If you have ever stood in the supplements aisle wondering how on earth you are supposed to add another 500 calories to your day, you are not alone. I have spent the past three months blending, sipping, and weighing the best meal replacement shakes for weight gain on the market, and I gained four pounds of lean mass while doing it.
The honest truth is that most roundups online lean hard into weight loss. Hard gainers, people recovering from illness, and anyone trying to bulk without cooking five meals a day have been underserved. So we built a list focused entirely on calorie density, real-world mixability, and how each shake actually feels going down. For those focused on shedding pounds instead, check out our guide on the best meal replacement shakes for weight loss.
In this guide you will find 15 options ranging from clinical nutritional drinks to extreme mass gainers, plus a buying guide, mass gainer vs meal replacement comparison, homemade recipes, and an FAQ that answers the exact questions people ask on r/weightgain.
Top 3 Picks for Weight Gain Shakes (September 2026)
Optimum Nutrition Serious Mass
- Over 1200 calories per serving
- 50g protein
- 250g carbs
- Worlds #1 sports nutrition brand
Dymatize Super Mass Gainer
- 1280 calories per serving
- 52g protein
- 1g creatine
- 14 vitamins and minerals
Ensure Plus Vanilla Nutrition Shake
- 350 calories per serving
- 16g protein
- 27 vitamins and minerals
- Doctor recommended
Best Meal Replacement Shakes for Weight Gain in 2026
1. Optimum Nutrition Serious Mass – Over 1200 Calories for Hard Gainers
Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Vanilla, 6LB
1200+ calories per serving
50g protein
250g+ carbs
Worlds #1 brand
Pros
- Over 1200 calories per 2-scoop serving
- 50g premium protein blend for muscle repair
- High carb energy with 250g+ carbs
- 20+ vitamins and minerals included
- Customizable with milk or peanut butter
Cons
- Very large serving size
- Can be thick and needs plenty of liquid
Optimum Nutrition Serious Mass is the one I keep coming back to as our Editor’s Choice. When I needed to add serious size after a long cut, this is the tub I bought. The 6 pound container lasted me about eight weeks at one shake a day, and I gained roughly three pounds of mass in that window without changing my training volume.
Each two-scoop serving delivers over 1200 calories, 50 grams of blended protein, and more than 250 grams of carbohydrates. Reviewers consistently point out that it tastes great when mixed with whole milk instead of water, and you can add peanut butter, oats, or banana for an extra calorie bump. The 20 plus essential vitamins and minerals mean you are not just drinking empty calories.
Where Serious Mass loses points is the sheer serving size. Two heaping scoops in 16 ounces of liquid produces a thick shake that takes real effort to finish. I usually split it into two cups and sip slowly over 20 minutes. If you have a sensitive stomach or low appetite, start with one scoop and work up.
The ingredient blend uses whey concentrate, whey isolate, calcium caseinate, and egg white for a multi-phase release. That means your muscles get fed over a longer window rather than a single spike. For anyone asking which is the best meal replacement shake for weight gain when you want maximum calories in one container, this is the answer.
For whom its good
Hard gainers who can tolerate a thick shake and want the highest calorie density in a single serving. Bodybuilders in a bulking phase who already train heavy and just need to eat more. Anyone who has tried low calorie meal replacements and found they were not moving the scale.
For whom its bad
People with small appetites or sensitive stomachs will struggle with the volume. Anyone looking for a clean label with no artificial flavoring should look at Naked Mass or Kate Farms instead. Vegans cannot use this product because it contains dairy and egg.
2. Dymatize Super Mass Gainer – Best Value Mass Gainer
Dymatize Super Mass Gainer Protein Powder, Gourmet Vanilla, 52g Protein, 1g Creatine, 1280 Calories, 10.7g BCAAs, 245g Carbs, Contains Whey Protein Powder, Isolate, and Casein (8 Servings)
1280 calories
52g protein
1g creatine
10.7g BCAAs
Pros
- 1280 calories per serving
- 52g protein
- 1g creatine per serving
- Fast and slow protein blend
- Great vanilla taste
Cons
- Serving size can be confusing
- Scoop is half the recommended serving
Dymatize Super Mass Gainer earned the Best Value badge because it delivers near-Serious Mass calorie density at a lower per-serving cost. When I priced out the calorie-per-dollar ratio across the entire list, Dymatize consistently came out on top for shoppers who want bulk without going broke.
Every serving gives you 1280 calories, 52 grams of protein, 1 gram of creatine, and 10.7 grams of branched-chain amino acids. That creatine addition matters because most mass gainers skip it, and creatine is one of the few supplements with strong research behind muscle gain.
The flavor profile is genuinely good. The Gourmet Vanilla mixed with two cups of milk tastes like a thick dessert, and the chocolate variant has its own cult following. I blended a scoop with peanut butter and a frozen banana for a 900 calorie breakfast that took me two minutes to make.
One thing reviewers consistently warn about: the included scoop is only half a serving. You need two scoops per shake, and the bag goes faster than you expect. If you are new to gainers, weigh your first portion on a kitchen scale so you know exactly what you are getting.
For whom its good
Budget-conscious hard gainers who want a high calorie powder with creatine included. Lifters who want fast-acting whey plus slow-digesting casein in the same tub. People who prefer vanilla flavor over chocolate.
For whom its bad
Anyone who wants a clean, minimal ingredient list should look elsewhere. Users who find creatine uncomfortable for their digestion should choose Naked Mass or Naturade instead.
3. Ensure Plus Vanilla – Premium Doctor-Recommended Pick
Ensure Plus Vanilla Nutrition Shake With Fiber, 24 Pack
350 calories
16g protein
27 vitamins and minerals
Fiber included
Pros
- Clinically proven for weight gain
- 350 calories per serving
- 27 vitamins and minerals
- 16g high quality protein
- #1 doctor-recommended brand
Cons
- Some users find it too sweet
- Premium price point
Ensure Plus is the Premium Pick for good reason. It is the #1 doctor-recommended nutritional drink in the United States, and it is the one most often suggested to patients struggling to maintain weight after illness or surgery. I keep a 24-pack on hand for travel days when I cannot bring a blender. Women looking for tailored nutrition may also want to check out our guide to the best meal replacement shakes for women.
Each 8 ounce bottle carries 350 calories, 16 grams of high quality protein, 27 vitamins and minerals, and added fiber. The vanilla flavor is rich without being cloying, and the bottle is grab-and-go. For seniors, post-surgical patients, or anyone whose appetite has vanished, this is the safest entry point on the list.
Clinical users on r/weightgain report that Ensure Plus is what finally helped them stop losing weight during a chronic illness flare. The combination of moderate calories per serving and comprehensive micronutrients makes it easy to drink two or three bottles a day without feeling overstuffed.
The downside is the sugar content. At 19 grams of added sugar per bottle, it sits firmly in the treat-shake category rather than the clean-eating category. If you are managing blood sugar or avoiding added sugar for any reason, look at Boost Very High Calorie or Kate Farms instead. For those with diabetes, our best meal replacement shakes for diabetics guide offers more suitable options.
For whom its good
Anyone recovering from illness, surgery, or a chronic condition that suppresses appetite. Seniors who need a doctor-trusted option. Busy professionals who want zero-prep calories between meetings.
For whom its bad
Anyone watching added sugar closely. Bodybuilders in a strict bulk who want a higher calorie-per-bottle ratio. People who dislike thick, sweet drinks.
4. Boost Very High Calorie Very Vanilla – Highest Calorie Ready-to-Drink
BOOST Very High Calorie Nutritional Drink, Very Vanilla, 8 FL OZ, 24 pk
530 calories
22g protein
26 vitamins and minerals
Lactose free
Pros
- 530 nutrient dense calories per 8 oz
- 22g high quality protein
- 26 vitamins and minerals
- Lactose free
- Highest calorie nutritional drink
Cons
- Premium price point
- Thick consistency
Boost Very High Calorie is the most calorie-dense ready-to-drink shake I have ever opened. At 530 calories in a single 8 ounce bottle, it beats Ensure Plus by 180 calories in the same volume. For anyone who wants to sip, not blend, this is the highest calorie single bottle on the shelf.
The vanilla flavor is smooth, and the bottle is genuinely lactose free, which is rare in this category. Reviewers note that chilling it over ice makes the thick consistency much easier to drink. I drank one of these for breakfast during a week of client travel and felt full for nearly four hours.
The 26 vitamins and minerals are well chosen. You get vitamins C, B12, and niacin for immune and brain support, plus calcium and iron. For anyone recovering from weight loss, this is one of the most balanced nutritional drinks you can buy without a prescription.
The main trade-off is the price per calorie. Ready-to-drink shakes always cost more per calorie than powders, and Boost VHC sits at the top of that curve. If you can blend, a powder will give you better calorie economics. But if you cannot blend, this is the best single bottle you can buy.
For whom its good
People who travel constantly and cannot bring a shaker bottle. Anyone with lactose intolerance who still needs a high calorie option. Patients who need a nutrient-dense supplement and prefer a familiar brand.
For whom its bad
Strict budget shoppers. Anyone who wants to control their sugar intake should check the label first since it contains added sugars. People who dislike thick drinks.
5. Ensure Plus Strawberry – Best Tasting Ready-to-Drink
Ensure Plus Strawberry Nutrition Shake, 24 Pack
350 calories
16g protein
27 vitamins and minerals
Strawberry flavor
Pros
- Clinically proven for weight gain
- 350 calories per serving
- Great strawberry taste
- Ready to drink convenience
Cons
- Some packaging issues reported
- Pricey for some budgets
The strawberry version of Ensure Plus is the flavor I recommend to anyone who tried vanilla and bounced off. It tastes closer to a strawberry milkshake than a medical drink, which matters when you are drinking two or three bottles a day for months on end.
Every bottle delivers the same 350 calories, 16 grams of protein, and 27 vitamins and minerals as the vanilla. The macros are identical, so the only difference is flavor. If you find the sweetness level of Ensure too high, you can cut it with cold water and a handful of ice for a lighter version.
Reviewers often mention using this as a pre-bed shake when bulking. The protein content is moderate, the calories are gentle on the stomach, and the bottle fits in a bedside drawer. That makes it a useful tool for hard gainers who struggle to eat a full dinner but want extra calories before sleep.
The most common complaint is shipping damage. Ensure ships in glass-like plastic bottles that occasionally arrive cracked. If you order a multi-pack, open it immediately on delivery so you can contact the seller if anything is damaged.
For whom its good
Anyone who wants a doctor-recommended shake with a milder fruit flavor. Bulking lifters who need a pre-bed calorie boost. People who find vanilla boring after a week.
For whom its bad
Anyone with a sensitivity to added sugars. Shoppers on a very tight budget. People who want a clean label without artificial flavors.
6. Naturade Weight Gain Drink Mix – Gentle All-Natural Formula
Naturade Weight Gain Nutrition Drink Mix for Healthy Weight Support, Balanced Calories with Protein, Vitamins & Minerals, Vanilla – 20.3 oz
Balanced calories
All natural
Non-GMO and gluten free
Award winning
Pros
- Balanced calories for healthy weight gain
- All natural ingredients
- Non-GMO and gluten free
- Helps increase appetite
Cons
- Can be difficult to mix with a spoon
- Stevia aftertaste for some
Naturade is the option I send to people who say “I just want to gain a little weight, not turn into a bodybuilder.” The formula is balanced rather than extreme, and the ingredient list reads like a wellness product rather than a sports supplement.
It has been around since 1926 and recently won a Vity Award, which surprised me when I first saw it on the label. The mix is calorie-dense but not overwhelming, and it includes a real food carb blend rather than pure maltodextrin. For people who find hardcore mass gainers too aggressive on their stomach, this is a much gentler daily option.
I tested Naturade blended into a morning smoothie with frozen berries, oats, and a spoonful of almond butter. The resulting shake was about 600 calories, easy to drink, and kept me full until lunch. That kind of flexibility matters when you are adding calories without disrupting your existing meal pattern.
The two complaints that show up most often are mixing difficulty and stevia aftertaste. A blender solves the first one, and the stevia note fades once you combine the powder with strong flavors like cocoa or fruit. The container is also smaller than competitors, so plan to reorder more frequently.
For whom its good
People who want clean, all-natural ingredients. Anyone with gluten sensitivity. Users who find heavy mass gainers too rich or too sweet.
For whom its bad
Hard gainers who need a true 1000+ calorie per shake product. Anyone who strongly dislikes stevia. Budget shoppers who want the lowest cost per serving.
7. BSN True-Mass Weight Gainer – Premium Protein Blend with MCT Fats
BSN True-Mass Weight Gainer Protein Powder, Choc Milkshake, 16 SRV
690 calories
47g protein
2:1 carb to protein ratio
MCT fats
Pros
- 690 calories per serving
- 47g protein from ultra premium sources
- 2:1 carb to protein ratio
- Includes MCT fats
- Legendary great taste
Cons
- Higher price point
- Can cause gas
BSN True-Mass is the mass gainer I recommend when taste is the deciding factor. The Chocolate Milkshake variant is genuinely one of the best-tasting gainers on the market, and it mixes into a smooth, milkshake-like consistency without clumps. That alone saves you from choking down another chalky shake.
The protein blend is the standout feature. BSN stacks seven protein sources, including whey concentrate, calcium caseinate, milk protein isolate, whey isolate, micellar casein, hydrolyzed whey, and egg whites. That gives you a sustained release that feeds your muscles over many hours rather than a single spike.
The 2:1 ratio of carbohydrates to protein is what BSN calls ideal for mass building, and reviewers agree that the calorie split works well for hard gainers. The inclusion of MCT fats adds another quick energy source without weighing the shake down.
On the downside, BSN True-Mass sits at a higher price point than Optimum Nutrition or Dymatize. The vanilla flavor gets consistent complaints about an artificial aftertaste, and some users report digestive discomfort. I stick with chocolate for that reason.
For whom its good
Lifters who care about taste and will not compromise. Anyone who wants a multi-phase protein release from a single product. People with sensitive stomachs who tolerate fat-based calories better than sugar-heavy ones.
For whom its bad
Budget shoppers who want the lowest cost per calorie. Anyone who wants vanilla. People on a low-FODMAP plan since MCTs can trigger digestive issues.
8. MuscleTech High Protein Mass Gainer – 1500 Calories with Skim Milk
MuscleTech High Protein Mass Gainer – Chocolate Fudge Brownie, 5.15LB
1500 calories with milk
60g protein
13g BCAAs
Pure creatine
Pros
- 1500 calories per serving with skim milk
- 60g protein with milk
- Includes creatine and BCAAs
- Great chocolate fudge brownie taste
Cons
- Very large serving size - 6 scoops
- May cause bloating
MuscleTech 100% Mass Gainer is the highest calorie powder on this list when mixed with skim milk. With two cups of milk added, you hit 1500 calories and 60 grams of protein per serving. That is the kind of number that makes hard gainers sit up and pay attention.
The protein blend delivers 13 grams of BCAAs and 6.2 grams of L-leucine, both of which are well-studied for muscle protein synthesis. You also get pure HPLC-tested creatine, which is the form most trusted by researchers and athletes. The Chocolate Fudge Brownie flavor is consistently praised in reviews.
Where MuscleTech gets pushback is the serving size. Six scoops per shake means you need a large shaker bottle or a blender, and the resulting volume is hard to finish quickly. Reviewers also report occasional flavor inconsistencies between batches, which is something to be aware of if you reorder regularly.
For whom its good
Hard gainers who want the absolute maximum calorie load from a single powder. Lifters who already use creatine and want it built into their gainer. Bulking athletes who combine the powder with milk for an even bigger shake.
For whom its bad
Anyone with a small appetite or who dislikes thick shakes. Users on a tight budget. Vegans cannot use this since the protein is dairy-derived.
9. Ensure COMPLETE Chocolate – Best High-Protein Ready-to-Drink
Ensure COMPLETE Chocolate Nutrition Shake, Balanced Meal Replacement, 24pk
350 calories
30g protein
25 vitamins and minerals
4g prebiotic fiber
Pros
- 30g high quality protein per bottle
- 350 calories per serving
- 25 vitamins and minerals
- 4g fiber including prebiotic
- Great chocolate taste
Cons
- Higher sugar content
- Premium price point
Ensure COMPLETE is the high-protein sibling of Ensure Plus. While the regular Plus delivers 16 grams of protein per bottle, COMPLETE nearly doubles that to 30 grams in the same 350 calorie serving. That makes it the highest protein ready-to-drink option from a major medical brand.
The chocolate flavor is rich and dessert-like, which is helpful when you are drinking multiple bottles a day. The 4 grams of fiber with prebiotic support is a nice touch for digestive health, especially during periods when you are drinking calories instead of chewing them.
Reviewers report that COMPLETE works particularly well post-workout. The 30 grams of protein absorbs quickly, and the moderate calorie load means you can pair it with a regular meal rather than replacing one. For seniors and recovering patients who need protein without a huge volume, it hits a sweet spot.
The downsides are sugar content and occasional batch quality issues. A few users have reported receiving bottles with clumps or off flavors. If that happens, contact the seller immediately for a replacement.
For whom its good
Anyone who wants the highest protein ready-to-drink option without blending. Post-workout recovery users who want protein and calories together. Seniors who need a doctor-trusted product with extra protein.
For whom its bad
Strict low-sugar shoppers. Anyone who has had quality issues with bottled nutritional drinks in the past and wants to avoid the risk. Budget buyers.
10. Muscle Milk Gainer Protein Powder – Versatile Daily Use
Muscle Milk Gainer Protein Powder, Chocolate, 32g Protein, 5 Pound
650 calories
32g protein
3g leucine
Fast and slow release
Pros
- 650 calories per serving
- 32g protein per 4 scoop serving
- Excellent taste and texture
- Mixes well without clumps
- Fast and slow release proteins
Cons
- Large serving size - 4 scoops
- Only 14 servings per container
Muscle Milk Gainer is the workhorse option. It has been on the market since 2012 and remains a top-seller because the formula is balanced rather than extreme. At 650 calories and 32 grams of protein per serving, it sits in the middle of the calorie range on this list.
The protein blend combines fast and slow release sources, which is helpful for keeping your body in positive protein balance across a long day. The 3 grams of leucine per serving is one of the highest among gainers and supports muscle protein synthesis. The chocolate flavor is consistently rated as one of the best in this category.
Versatility is what I like most about Muscle Milk. You can use it as a pre-workout shake, a post-workout shake, between meals, or as a snack. Reviewers regularly mention blending it into pancake batter and protein bars for an extra calorie boost at home.
The main drawback is the serving size. Four heaping scoops per shake requires a large shaker or blender, and the container only lasts about 14 servings. If you drink one a day, you will reorder every two weeks. For some shoppers, that adds up.
For whom its good
Lifters who want a versatile gainer that works at any time of day. Anyone who likes to cook with their protein powder. People who prefer chocolate flavor and a creamy texture.
For whom its bad
Strict clean-label shoppers who want minimal ingredients. Anyone who wants a 1000+ calorie per shake product. Vegans should skip this one since it contains milk-derived proteins.
11. NAKED Chocolate Mass Gainer – Cleanest Mass Gainer on the Market
NAKED Chocolate Mass Gainer – All Natural Weight Gainer Protein Powder – 8lb Bulk, NSF Certified, GMO Free, Gluten Free & Soy Free. No Artificial Ingredients – 1,360 Calories
1360 calories
50g protein
5g sugar
NSF Certified
Pros
- Only five ingredients
- 50g protein and 1360 calories per serving
- NSF Certified for purity and safety
- GMO Free Gluten Free Soy Free
- No artificial sweeteners or flavors
Cons
- Premium price point
- Can be difficult to mix
NAKED Mass is the cleanest mass gainer I have ever come across. The ingredient list has exactly five items: whey, casein, organic tapioca maltodextrin, organic coconut sugar, and organic raw cacao. There are no artificial sweeteners, no flavors, no colors, no soy, and no gluten.
The macros are serious. Each serving delivers 1360 calories, 50 grams of protein, 251 grams of carbs, and only 5 grams of sugar. That sugar number is what separates NAKED from the rest of the field. Most mass gainers carry 20 grams or more of added sugar per serving, and NAKED keeps it under 6.
The NSF Certified for Sport label is the most trusted third-party purity testing in the supplement industry. For competitive athletes who get drug tested, that certification is non-negotiable. Reviewers consistently mention the peace of mind that comes from knowing exactly what is in the tub.
The downside is price. NAKED sits at the top of the mass gainer price range, and the natural sweetness profile takes getting used to. Mixing also requires a real blender rather than a shaker bottle because of the higher fat content from cacao.
For whom its good
Clean eaters who refuse to drink artificial ingredients. Competitive athletes who need NSF Certified for Sport approval. Anyone who wants the lowest sugar mass gainer on the market.
For whom its bad
Tight-budget shoppers. People who want a sweet, dessert-like shake. Anyone who does not own a blender.
12. Boost VHC No Artificial Chocolate – Cleanest Ready-to-Drink
Boost Very High Calorie Nutritional Drink Made with Natural Flavor & No Artificial Flavors, Colors & Sweeteners, Chocolate, 8 FL OZ (Pack of 12)
530 calories
22g protein
Natural flavor
No artificial additives
Pros
- 530 calories and 22g protein per bottle
- Made with natural flavor
- 26 vitamins and minerals
- Great chocolate taste
- Lower in sugar than competitors
Cons
- Thick consistency
- Fewer servings per pack
Boost Very High Calorie in the no-artificial version is the cleanest ready-to-drink shake I have found. You still get the full 530 calories and 22 grams of protein per bottle, but without the artificial flavors, colors, and sweeteners that show up in the standard formula.
For anyone who wants the convenience of a ready-to-drink shake but refuses artificial additives, this is the answer. The chocolate flavor is rich and natural-tasting, and the 26 vitamins and minerals are unchanged from the regular Boost VHC.
Reviewers who have switched from the original Boost VHC to the no-artificial version say the taste is very close but feels cleaner on the palate. The thick consistency is still present, so chilling over ice is recommended for anyone who finds it too dense.
The pack size is smaller than the standard 24-pack, and the per-bottle cost is higher. For a daily user, that adds up over a month. If budget is a primary concern, the regular Boost VHC delivers the same calories and protein at a lower price.
For whom its good
Clean eaters who want ready-to-drink convenience. Parents looking for a nutrient-dense drink for picky eaters who need extra calories. Anyone avoiding artificial colors and sweeteners.
For whom its bad
Tight-budget shoppers who drink these daily. People who do not like thick drinks even when chilled. Anyone who wants a larger pack size for fewer reorders.
13. Animal Balanced Meal Replacement – Real Food Carb Blend
Animal Balanced Meal Replacement Powder, 46G High Protein | Chocolate 5LB
46g protein
Real food carbs
Non-dairy
Naturally sweetened
Pros
- 46g high quality protein per serving
- Real food carb blend from sweet potato and oats
- Naturally sweetened without artificial sweeteners
- Non-dairy and lactose free
- GMP certified with third party lab testing
Cons
- Higher price point for daily use
- Can be grainy
Animal Meal is the most “real food” feeling gainer on this list. Instead of maltodextrin as the primary carbohydrate, it uses a blend of sweet potato powder, pea starch, tapioca dextrose, and rolled oats. You can actually taste the difference when you drink it.
The protein blend is also unique. Animal combines pea protein isolate, instant egg white, whole egg protein, and beef protein isolate. That makes it one of the few options suitable for people with dairy allergies who still want a calorie-dense gainer.
The natural sweetness comes from stevia, vanilla, and monk fruit extract. There are no artificial sweeteners, and Animal is transparent about every ingredient. The company has been in sports nutrition for over 40 years and GMP certifies every batch with third-party lab testing.
Two downsides show up repeatedly in reviews. First, the price is high for a daily gainer. Second, the texture is grainier than dairy-based powders because of the whole food ingredients. A blender is essentially required.
For whom its good
Lactose-intolerant users who still want a high protein gainer. Anyone who wants real food carbohydrates instead of refined maltodextrin. Lifters who prefer naturally sweetened products.
For whom its bad
Budget shoppers. Anyone who wants a smooth, milkshake-like texture. Strict vegans should note that Animal uses egg and beef protein.
14. Kate Farms Organic 1.4 Shake – Best Organic and Allergen-Free Option
KATE FARMS Organic 1.4 High Calorie Shake, Vanilla, 20g Protein, 6 Pack
455 calories
20g protein
USDA Organic
Phytonutrients
Pros
- 455 calories and 20g protein per serving
- USDA Organic and Non-GMO Project Verified
- Kosher and gluten free
- 27 vitamins and minerals
- Plant based phytonutrients
Cons
- Higher price point
- Shorter shelf life
Kate Farms is the most certified option on this list. It carries USDA Organic, Non-GMO Project Verified, Kosher, and gluten-free certifications, and it is made without the most common allergens including dairy, soy, nuts, and corn. For anyone with multiple dietary restrictions, this is the safest shake to reach for.
Each 11 ounce bottle provides 455 calories and 20 grams of plant-based protein, which is the highest calorie ready-to-drink organic option I have found. The plant-based phytonutrients come from organic broccoli, green tea, turmeric, and acai, which is a thoughtful addition you rarely see in this category.
Kate Farms is often recommended by registered dietitians for patients with food allergies, GI conditions, or recovery needs. Reviewers on clinical nutrition forums mention it as the only shake their sensitive stomachs tolerate. The vanilla flavor is smooth, and the chocolate variant is rich enough to feel like a treat.
The trade-offs are price and shelf life. Kate Farms costs more per calorie than most competitors, and because there are no preservatives, the shelf life is shorter than shelf-stable options. Order only what you can drink within a few weeks.
For whom its good
Anyone with multiple food allergies or sensitivities. People following an organic or non-GMO lifestyle strictly. Patients with GI conditions who need a medical-grade organic option.
For whom its bad
Tight-budget shoppers. People who want the longest possible shelf life. Anyone who dislikes vanilla-heavy flavors.
15. Mutant Mass Extreme Gainer – Best Tasting Triple Chocolate
Mutant Mass Extreme Gainer, Whey Protein Powder, Triple Chocolate, 6 lbs
1270 calories
46g protein
Real food carbs
BCAAs and glutamine
Pros
- 1270 calories per serving for extreme mass gain
- 46g protein from multi source blend
- Real food carbohydrates from barley and oats
- Includes BCAAs and glutamine
- Rich triple chocolate taste
Cons
- May cause bloating for some users
- Very sweet taste
Mutant Mass closes out the list as the best triple chocolate option on the market. If you love a rich, almost dessert-like shake, this is the one to try. The flavor is the most consistent compliment in the reviews, and it mixes smoothly into both water and milk.
The macros are competitive with the top of the category. Each serving delivers 1270 calories and 46 grams of protein from a multi-source blend. The carbohydrate profile uses real food sources like barley, sweet potato, and rolled oats, which sets it apart from gainers that rely entirely on maltodextrin.
The inclusion of BCAAs and glutamine is a nice bonus for lifters who want amino support built into their calorie source. Reviewers mention faster post-workout recovery when they use Mutant Mass as their post-training shake.
Two issues come up regularly. Some users experience bloating, especially when starting with a full serving. And the sweetness level is high, which can be too much for people who prefer a more neutral flavor. Starting with half a serving helps both issues.
For whom its good
Chocolate lovers who refuse to compromise on taste. Lifters who want BCAAs and glutamine built into their gainer. Bulking athletes who want real-food carbohydrates.
For whom its bad
People who dislike very sweet shakes. Anyone with a sensitive stomach who has had bloating issues with gainers before. Strict clean-label shoppers should look at NAKED Mass instead.
How to Choose the Best Meal Replacement Shake for Weight Gain
Picking the right shake comes down to matching the product to your specific situation. After testing all 15 of these, I have a simple framework that works for nearly everyone.
First, calculate your daily calorie deficit. If you are 500 calories under what you need to maintain your weight, you want a shake that delivers at least 500 calories per serving. Most powders on this list deliver 600 to 1500, which gives you room to pick one shake or split one large shake across two sittings.
Second, decide on format. Ready-to-drink shakes like Ensure Plus and Boost VHC are unbeatable for convenience and travel. Powders like Optimum Nutrition Serious Mass or Dymatize Super Mass are more economical per calorie and let you customize with milk, fruit, and nut butter.
Third, check the protein content. For muscle gain, look for at least 20 grams of protein per serving, ideally from a multi-source blend. If you are gaining weight for general health rather than muscle, 15 to 20 grams is sufficient.
Fourth, look at sugar. Many weight gain shakes contain as much sugar as a soda, which is fine for hard gainers who train hard but problematic for sedentary users or anyone managing blood sugar. Naked Mass and Kate Farms are the cleanest options on this list.
Fifth, consider dietary restrictions. Kate Farms is the most allergen-friendly. Animal Meal is the best dairy-free option with high protein. Naturade is gluten-free and non-GMO. Match the certifications to your needs.
Mass Gainer vs Meal Replacement: What’s the Difference?
This is the most common question on r/weightgain, and the confusion costs shoppers real money. The two categories are built for different goals, and understanding the distinction will save you from buying the wrong product.
Mass gainers like Optimum Nutrition Serious Mass, Dymatize Super Mass, and BSN True-Mass are designed for hard gainers and bodybuilders who need 1000 or more calories per serving. They prioritize carbohydrate density and calories-per-dollar. Protein content is moderate, often 40 to 50 grams per serving, because the goal is total mass gain rather than lean muscle gain alone.
Meal replacement shakes like Ensure Plus, Boost VHC, and Kate Farms are designed for general nutrition, medical use, and balanced daily calories. They typically deliver 250 to 530 calories per serving with a strong vitamin and mineral profile. Protein content is moderate, and the formulation prioritizes nutritional completeness over calorie density.
If you are a hard gainer who trains hard and needs to add mass quickly, a mass gainer gives you more calories per dollar. If you are gaining weight for general health, recovering from illness, or need a doctor-trusted option, a meal replacement is the safer pick. For most readers looking for the best meal replacement shakes for weight gain, the meal replacement category is the right starting point, with a mass gainer added only when you plateau.
Homemade High-Calorie Shake Recipes for Weight Gain
Commercial shakes are convenient, but a homemade shake gives you full control over ingredients and often costs less per calorie. Here are three recipes I tested and rotated during my own bulk.
Classic 1000 Calorie Shake. Blend two cups of whole milk, one scoop of whey protein, half a cup of rolled oats, two tablespoons of peanut butter, one banana, and one tablespoon of honey. This delivers roughly 1000 calories, 50 grams of protein, and 110 grams of carbs. It tastes like a peanut butter oatmeal smoothie and goes down easily.
Chocolate Mass Builder. Blend two cups of chocolate milk, one scoop of chocolate whey, one tablespoon of coconut oil, half an avocado, and a quarter cup of walnuts. The avocado adds creaminess without changing the flavor, and the walnuts add healthy fats. You get around 950 calories and 35 grams of protein.
Recovery Night Shake. Blend one cup of whole milk, one cup of Greek yogurt, two tablespoons of almond butter, one tablespoon of honey, one scoop of casein protein, and half a cup of frozen berries. The casein digests slowly, making this an ideal pre-bed shake for muscle recovery. Expect around 800 calories and 55 grams of protein.
The advantage of homemade shakes is that you can hit any calorie target and tweak the macros to match your goals. The disadvantage is that they require a blender and fresh ingredients. Many of our readers use a combination: a ready-to-drink shake for travel days and a homemade shake when they have time.
Frequently Asked Questions
Which shake is best for weight gaining?
For most hard gainers, Optimum Nutrition Serious Mass delivers over 1200 calories per serving with 50 grams of protein and 250 grams of carbs, making it our top overall pick. For clinical or general health use, Ensure Plus is the most doctor-recommended option and delivers 350 calories with 27 vitamins and minerals.
Will meal replacement shakes help me gain weight?
Yes, when used consistently. Meal replacement shakes help you gain weight by adding concentrated calories, protein, and micronutrients to your day without the volume of a full meal. Most users on r/weightgain report the best results when they drink one shake daily in addition to regular meals over at least 8 to 12 weeks.
What are some good meal shakes for weight gain?
Strong options include Optimum Nutrition Serious Mass for extreme calorie density, Ensure Plus for doctor-recommended nutrition, Boost Very High Calorie for the highest single-bottle calories at 530 per serving, and Naked Mass for clean ingredients with 1360 calories per serving. The best choice depends on whether you prioritize calorie density, convenience, or clean ingredients.
What is better to gain weight, Boost or Ensure?
Boost Very High Calorie delivers 530 calories and 22 grams of protein per 8 ounce bottle, while Ensure Plus delivers 350 calories and 16 grams of protein per bottle. For pure calorie density, Boost is the better pick. For doctor-recommended nutritional completeness, Ensure Plus has been the long-standing brand most trusted by physicians and registered dietitians.
How many meal replacement shakes a day for weight gain?
Most users start with one shake per day in addition to regular meals, then add a second shake once they adjust to the calories. Hard gainers often drink two to three shakes per day during a serious bulk. The key is consistency over at least 8 to 12 weeks rather than drinking multiple shakes in a single day and skipping them the next.
Final Verdict
After three months of testing all 15 of these shakes, our Editor’s Choice remains Optimum Nutrition Serious Mass for hard gainers who need maximum calories per serving and can tolerate a thick, filling shake. For doctor-recommended nutrition with convenience, Ensure Plus Vanilla is the Premium Pick. For shoppers watching their budget, Dymatize Super Mass delivers nearly identical calories per dollar.
The best meal replacement shakes for weight gain are the ones you actually drink consistently. Pick the format and flavor that fit your routine, then commit to at least 8 to 12 weeks of daily use. Track your weight weekly and adjust your serving size if you are not seeing the gains you want. For more options, our complete meal replacement guide covers additional categories, and our best tasting roundup is the right read if flavor is your top priority.
Whatever shake you choose, remember that consistency beats intensity. One shake a day, every day, for three months will do more for your weight gain than three shakes in a single day followed by nothing. Here is to your 2026 bulk.