10 Best Mass Gainers 2026 in the United States

Dymatize Super Mass Gainer is designed for people looking to increase muscle mass and overall calories efficiently. Each serving packs a high 1,280 calories, making it ideal for those who struggle to eat enough through regular meals. It offers a solid 52 grams of protein from a mix of whey, isolate, and casein, which helps with both quick and sustained muscle recovery. The carb content is quite high at 245 grams, which is good for energy and replenishing glycogen but might be more than needed for those watching their sugar intake. With 1 gram of creatine added, it also supports strength and power during workouts, and the inclusion of 14 vitamins and minerals is a nice bonus for overall health.

The rich chocolate flavor is generally well-liked and it mixes easily, making it convenient to blend into shakes or recipes like pancakes and protein bars. However, the container only offers 16 servings, which could feel pricey given the size and frequency of use typical for mass gainers. This mass gainer suits active adults seriously focused on muscle growth and who need a substantial calorie boost, but casual users or those with lighter calorie needs might find it too dense.

Optimum Nutrition Serious Mass is a high-calorie weight gainer designed to help individuals who need to pack on mass. It boasts over 1,200 calories per 2-scoop serving, making it ideal for those struggling to meet their caloric needs through regular meals. Each serving also includes 50 grams of blended protein, which supports muscle growth and recovery, along with over 250 grams of carbohydrates, essential for energy and replenishment after workouts.

The inclusion of over 20 vitamins and minerals, such as Vitamin C and Zinc, provides added immune support, which is a nice bonus for overall health. Additionally, the product offers versatility, as it can be blended with various other calorie-dense foods to further boost caloric intake. The flavor, chocolate, is popular and generally well-received for its taste and mixability.

The product comes in a large 12-pound container, which might be bulky for some users. It provides 16 servings per container, which is reasonable but might require frequent repurchasing for those using it daily. Another point to consider is that while it is caffeine-free, it doesn't include digestive enzymes, which might make it harder to digest for some people. In summary, Optimum Nutrition Serious Mass is a solid choice for those seeking a calorie-dense mass gainer with good protein and carbohydrate content, but it could benefit from the addition of digestive enzymes for better digestion, and the large container size could be cumbersome.

Optimum Nutrition Serious Mass is a high-calorie mass gainer designed to help people who want to gain weight and build muscle. Each serving offers a substantial 1,250 calories, powered by 50 grams of protein mainly from whey, which supports muscle growth. It also provides over 250 grams of carbohydrates, which is good for fueling workouts and replenishing energy. The fat content isn’t specified in detail but is generally balanced for a weight gainer.

One nice touch is the inclusion of 25 vitamins and minerals, plus added creatine and glutamine for muscle recovery and immune support, enhanced by Vitamin C, Zinc, and Vitamin D. This makes it more than just calories – it supports overall health too. The vanilla flavor is a common favorite and tends to mix well, though users might want to blend it with fruits or nuts to boost calorie intake and taste variety.

On the downside, the product contains milk and soy allergens, which could be an issue for some. Also, it’s caffeine-free, so it won’t interfere with sleep or cause jitters. Note that the packaging can vary and the product is sensitive to heat, so customers should be home during delivery to avoid damage. If you are vegetarian and looking for a convenient, nutrient-rich mass gainer with a strong calorie and protein profile, this is a solid choice. However, if you have allergies or want more detailed fat information, you might want to consider those factors before buying.