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10 Best Weight Gain Supplements 2025 in the United States

#1

Winner

9.7 score

Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Vitamin C and Zinc for Immune Support, Vanilla, 12 Pound (Packaging May Vary)

Optimum Nutrition Serious Mass Weight Gainer Protein Powder is designed for those looking to increase their caloric intake and build muscle mass. Featuring 1,250 calories per 2-scoop serving, it provides a substantial caloric boost. Each serving also packs an impressive 50 grams of protein and over 250 grams of carbohydrates, ideal for muscle recovery and energy replenishment. Additionally, the product includes 25 vitamins and minerals, plus creatine and glutamine, to support overall health and muscle function.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Caloric Content
Tasty and not overly sweet, making it a convenient way to boost calorie intake for those struggling to gain weight.
Flavor and Mixability
Strawberry flavor tastes like strawberry milk and is pretty good.
#2
9.4 score

Optimum Nutrition Serious Mass, Weight Gainer Protein Powder, Mass Gainer, Vitamin C and Zinc for Immune Support, Creatine, Vanilla, 6 Pound (Packaging May Vary)

Optimum Nutrition Serious Mass is a weight-gain supplement designed to help individuals increase their calorie intake and gain weight. It offers a high caloric content with over 1,200 calories per 2-scoop serving, which is excellent for those looking to add mass. The product also provides 50 grams of protein per serving, which supports muscle growth and recovery. Additionally, it includes over 250 grams of carbohydrates, which are essential for energy and replenishing glycogen stores post-workout.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Caloric Content
With 1,250 calories per serving, this is a powerful supplement for those looking to gain weight and muscle. It mixes easily without clumps.
Protein Content
I gained about 10 pounds so far since I bought this. It works well if you pair it with other protein sources.
Digestibility
I mix it with my coffee, and while it is clumpy at first, it dissolves within minutes. The taste is absolutely doable.
Flavor and Mixability
The taste is pretty good; it's like strawberry milk. Just make sure to blend it long enough to avoid chunks.
#3
9.1 score

Dymatize Super Mass Gainer Protein Powder, 1280 Calories & 52g Protein, Gain Strength & Size Quickly, 10.7g BCAAs, Mixes Easily, Tastes Delicious, Gourmet Vanilla, Gourmet Vanilla, 6 Pound (Pack of 1)

Dymatize Super Mass Gainer Protein Powder is designed for individuals looking to quickly gain weight and muscle mass. Each serving packs a hefty 1280 calories and 245 grams of carbohydrates, making it easier for hard gainers to increase their calorie intake. The product also offers 52 grams of protein, which consists of both fast and slow-digesting proteins to keep muscles fueled throughout the day.

Customer Highlights

A summary of real customer reviews to highlight what shoppers are saying!
Caloric Content
It's an effective meal replacement for those struggling with appetite due to anxiety, thanks to its high calorie and protein content.
Protein Content
It's an effective meal replacement for those struggling with appetite due to anxiety, thanks to its high calorie and protein content.
Digestibility
No stomach issues have been experienced due to the quality ingredients and fineness of the powder.
Flavor and Mixability
The chocolate flavor is amazing and tastes exactly like a frothy Wendy's Frosty.

Top 10 Best Weight Gain Supplements 2025 in the United States

#1

Winner

9.7 score

Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Vitamin C and Zinc for Immune Support, Vanilla, 12 Pound (Packaging May Vary)

Caloric Content: 1250 calories per serving
Protein Content: 50 grams per serving
Carbohydrate Content: over 250 grams per serving
Vitamins and Minerals: 25 vitamins and minerals
Flavor and Mixability: Vanilla flavor, enhanced mixability

Chosen by 1220 this week

Mass Gainer MuscleTech 100% Mass Gainer Protein Powder Protein Powder for Muscle Gain Whey Protein + Muscle Builder Creatine Supplements Vanilla, 5.15 Pound (Pack of 1)

Caloric Content: 1,500 calories with 2 cups milk
Protein Content: significant protein from whey
Carbohydrate Content: contains carbohydrates
Fat Content: contains fats
Digestibility: consider individual tolerance to ingredients
Flavor and Mixability: vanilla-flavored, good mixability

Optimum Nutrition GS Pro Gainer Weight Gainer Protein Powder, Double Chocolate, 5.09 Pounds (Packaging May Vary)

Caloric Content: 650 calories per serving
Protein Content: 60 grams per serving
Carbohydrate Content: 85 grams per serving
Vitamins and Minerals: 32 vitamins and minerals
Flavor and Mixability: Double Chocolate, mixes effortlessly

BSN TRUE-MASS Weight Gainer, Muscle Mass Gainer Protein Powder, Vanilla Ice Cream, 5.82 Pound

Caloric Content: 700 calories
Protein Content: 46g to 50g
Carbohydrate Content: 2:1 carbs to protein
Fat Content: Medium chain triglycerides (MCT)
Flavor and Mixability: Vanilla Ice Cream, good mixability
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Buying Guide for the Best Weight Gain Supplements

Choosing the right weight-gain supplement can be a game-changer in your fitness journey. Whether you're looking to build muscle, recover from an illness, or simply add some healthy weight, it's important to understand the key specifications of these supplements. By knowing what to look for, you can select a product that best fits your needs and goals.
Caloric ContentCaloric content refers to the number of calories provided by the supplement per serving. This is crucial because gaining weight requires a caloric surplus, meaning you need to consume more calories than you burn. Supplements with higher caloric content are ideal for those who struggle to eat enough food throughout the day. If you're just starting out or have a fast metabolism, look for supplements with higher calories per serving. For those who are more advanced or have a slower metabolism, a moderate caloric content might be more appropriate.
Protein ContentProtein content indicates the amount of protein in each serving of the supplement. Protein is essential for muscle growth and repair, making it a key component of weight-gain supplements. Typically, supplements will range from 20 to 50 grams of protein per serving. If your goal is to build muscle, opt for a supplement with higher protein content. If you're looking to gain weight without focusing too much on muscle, a moderate protein content will suffice.
Carbohydrate ContentCarbohydrate content shows how many carbs are in each serving. Carbohydrates are the body's primary energy source and are important for fueling workouts and daily activities. Supplements can vary widely in their carbohydrate content, from low-carb options to those with over 100 grams per serving. If you have a high activity level or are looking to gain weight quickly, choose a supplement with higher carbohydrate content. For those who are less active or prefer a slower weight gain, a lower carbohydrate content might be better.
Fat ContentFat content refers to the amount of fat in each serving of the supplement. Fats are a dense source of calories and are important for overall health. Supplements can range from low-fat to high-fat options. If you need to increase your caloric intake significantly, a supplement with higher fat content can be beneficial. However, if you are concerned about maintaining a balanced diet, a moderate fat content might be more suitable.
Vitamins and MineralsVitamins and minerals are essential nutrients that support various bodily functions and overall health. Some weight-gain supplements are fortified with additional vitamins and minerals to ensure you're getting a well-rounded nutrient profile. If you have a balanced diet, this might not be as crucial, but if your diet lacks variety, choosing a supplement with added vitamins and minerals can help fill those gaps.
DigestibilityDigestibility refers to how easily the supplement is absorbed and utilized by your body. This is important because a supplement that is hard to digest can cause discomfort and may not be as effective. Look for supplements that are known for being gentle on the stomach, especially if you have a sensitive digestive system. Ingredients like digestive enzymes and probiotics can enhance digestibility.
Flavor and MixabilityFlavor and mixability are about how the supplement tastes and how well it mixes with liquids. This is important because if you don't enjoy the taste or find it difficult to mix, you're less likely to use the supplement consistently. Choose a flavor you enjoy and check reviews to see if the supplement mixes well with water, milk, or other beverages. This will make your weight-gain journey more pleasant and sustainable.

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