9 Best Drinks for Weight Gain | Skip the Junk, Sip Real Gains

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The clean-label heavyweight that has kept people fed through their hardest months.

This is the same 530-calorie powerhouse as the variety pack, but in a single chocolate flavor made without artificial flavors, colors, or sweeteners. It is BOOST’s highest-calorie drink, delivering 530 nutrient-rich calories, 22 grams of protein, and 26 vitamins and minerals per 8 fluid ounces. If you want maximum energy in a small glass, this is the formula.

The story here is survival and recovery. One buyer battling radiation-induced taste loss wrote: “This has been my survival. Having issues as a result of radiation, no taste and no appetite was able to keep my calories up. Recommend by a nutritionist.” Others bought it for elderly parents who lost weight from health issues and found it to be a genuine help in gaining it back.

The honest trade-off is the thickness. Because it squeezes 530 calories into such a small volume, the consistency is heavier than typical nutritional drinks — the manufacturer itself recommends chilling it over ice and sipping slowly. A family member of an older user found that blending it with a bit of ice cream into a milkshake made it far more palatable for someone who was reluctant to drink it plain.

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A plant-based, certified-organic shake for anyone who refuses to compromise on ingredients.

If you have a sensitive gut or simply want nothing artificial, this organic shake stands apart from the standard hospital-style drinks. Each serving gives you 455 calories, 20 grams of protein, plus 27 vitamins and minerals — a bit fewer calories than the BOOST above, so the flavor can stay cleaner. It is Certified USDA Organic, Non-GMO Project Verified, Kosher, gluten-free, and made without artificial flavors or sweeteners.

For those with digestive issues, this has been a genuine life-saver. Buyers with chronic stomach problems and acid reflux report it helps weight gain without the discomfort other shakes cause, and it has been recommended by nutritionists. The plant-based formula uses phytonutrients sourced from foods like organic broccoli, green tea, turmeric, and acai for an extra nutrition layer most competitors skip.

The catch: vanilla is best blended with fruit or peanut butter, while the chocolate flavor works fine on its own. Elderly users and cancer patients have maintained their weight on this during treatment, with smooth texture that is gentle even with a very low appetite. It costs more per serving than standard drinks, but the nutrient density and clean ingredient list justify the premium for many.

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The vanilla gainer that goes down easy and keeps your stomach quiet.

This powder is engineered for people whose bodies rebel against heavy shakes. The formula blends fast-digesting whey concentrate and isolate with slow-digesting micellar casein, then adds a 16-strain probiotic blend, fiber, and digestive enzymes to keep things moving smoothly. With 25 grams of protein per serving and only 7 grams of sugar, it is a measured approach to weight gain rather than a sugar bomb.

Taste is the thing everyone raves about — it is the most-mentioned positive in the reviews. Owners describe it as not too sweet, easy to mix with water, and completely free of chemical aftertaste. The digestive side is the quiet hero: people with sensitive stomachs and even mild lactose issues report no nausea and no bloating, which is rare in this category. One buyer who used it daily for two months gained weight without any stomach trouble.

Mix 2 scoops into 8-10 ounces of water or your favorite beverage for a filling shake. The texture blends well and stays smooth, with some noting it works best in a blender for the creamiest result.

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Beef protein isolate for lifters who cannot touch dairy but still want 50 grams per scoop.

If lactose intolerance has locked you out of every other gainer, this is your way in. CARNIVOR Mass is built on 100% beef protein isolate — no whey, no dairy — and it is completely lactose-free with 0 fat and 0 sugar. Each serving delivers over 700 calories, 50 grams of beef protein isolate, and 125 grams of carbs, making it among the most extreme calorie packages on this list.

The brand claims its protein is “350% more concentrated in amino acids than steak,” with added BCAAs for muscle-building support. Buyers with both lactose intolerance and soy allergies — a genuinely tough combination for shake drinkers — report it digests well and mixes perfectly even with just water. One long-time user called it their favorite protein supplement because it never upset their stomach.

The vanilla caramel flavor is sweet — some owners note it is “super sweet” — and the texture carries a slight collagen stickiness. It is a serious tool for serious mass-building: if you want the highest protein-per-scoop of any powder here, this 50-gram serving beats even the 25-gram MRM above by a wide margin, but it is a heavier, more intense daily drink.

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Medical-grade organic nutrition that works as a full meal or a tube feed.

This is the most versatile shake on the list because it is formulated for the most extreme situations. These 11 fluid ounce shakes are designed as medical nutrition, suitable for both oral consumption and medically necessary tube feeding. The organic, plant-based formula is made without dairy, soy, corn, gluten, nuts, artificial colors, or sweeteners — an allergen list shorter than almost anything else here.

With 16 grams of protein and 27 vitamins and minerals per bottle, it works as a meal replacement or a supplement drink. Reviews show a striking pattern: hospital-recommended, credited with helping people recover from life-threatening illness, regain appetite after PTSD, and support an elderly grandfather through heart failure. The vanilla flavor is the standout, described as not overly sweet with an excellent clean taste.

The value opinions are genuinely split — some find it expensive for what you get, and there are occasional complaints about receiving the wrong flavor from Amazon. But for anyone who needs a shake that is simultaneously organic, vegan-friendly, gluten-free, and dairy-free, this is the bottle that checks every box. It is the purest option here, and that purity is exactly what some situations demand.

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The 1,200-calorie bulldozer for skinny guys who have tried everything else.

When diet alone is not enough, this is the mass gainer people actually reach for. A single 2-scoop serving delivers over 1,200 calories, 50 grams of blended protein, and over 250 grams of carbohydrates. It also brings 20+ essential vitamins and minerals including Vitamin C and Zinc, plus creatine, glutamine, and BCAAs — a complete bulking toolkit in one scoop.

Customers note gaining up to 15 pounds, with one user adding 10 pounds back after losing 25 during an illness and another gaining 15 pounds while cutting body fat by 4%. The chocolate flavor gets consistent praise for being dessert-like without being overly sweet, and it mixes well with ice and milk in a blender.

The honest warnings: the shake is thick, and hand-mixing is difficult — you really want a blender. The bigger recurring issue is digestive: some reviewers point out gas, bloating, and constipation unless they add extra fiber to their diet. This is a heavy-duty tool for heavy-duty goals, and it pairs best with a fiber-rich diet to keep your gut comfortable.

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A 560-calorie lean gainer that tastes like frozen yogurt and mixes without a blender.

For lifters who want to add size without the sloppy carb-heavy feeling of classic mass gainers, this is the clean middle path. Each serving delivers 560 quality calories, 30 grams of protein, and 97 grams of multi-source carbs from premium proteins, fast-fueling carbohydrates, and energy-packed lipids. It is also banned-substance tested, which matters if you compete.

Taste is the headline — owners literally compare the soft serve vanilla flavor to vanilla frozen yogurt and vanilla milkshakes. It is sweet, but that sweetness is the draw for people with low appetites who need to actually enjoy the calories. The mixability is a big practical win: it mixes cleanly with water or milk and needs no blender, and the zip-top bag keeps the powder fresh for long-term use.

The digestive feedback splits in half. Many find it easy on the stomach and non-clumping, but a subset reports stomach pain — and the culprit seems to be sucralose, which one owner says causes nausea at full serving size. If artificial sweeteners bother you, this may not be the gainer for you, despite its otherwise excellent formula.

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A 60-gram protein hammer that rebuilds what illness or hard training takes away.

This one answers a specific question: what if you want huge protein numbers without a face-full of sugar? Each serving delivers 650 calories, an enormous 60-gram protein blend, and more than 80 grams of carbohydrates — all with less than 8 grams of sugar. That protein count is the highest on this list, beating even the 50-gram serious mass options above.

The results are fast and dramatic. One buyer gained 5 pounds in 6 days, while another recovering from surgery used it to help her husband regain 15 pounds and return to workouts. People on GLP-1 medications — who often lose their appetite entirely — use it as a survival meal replacement. The vanilla custard flavor is described as “amazing,” and it mixes smoothly with both water and milk.

Owners mention no bloating and good digestibility, which is notable for a shake with this much protein. The main knock is price — it is the most expensive pick here, and a few note the serving size feels moderate for the cost. But if your priority is rebuilding muscle fast after a loss, this 60-gram formula is the most efficient protein delivery system in this entire roundup.