10 Best Mass Gainers 2026 in the United States

Naked Mass is a natural weight gainer protein powder designed to help individuals increase their calorie and protein intake efficiently. With 1,250 calories per serving, it is ideal for those struggling to gain weight. Each serving contains 50g of protein and 252g of carbohydrates, highlighting its high-calorie content essential for bulking up. The protein blend includes fast-release whey and slow-digesting casein, offering a sustained protein release that supports muscle synthesis over time.

The product is free from artificial sweeteners, flavors, and colors, making it a clean option with only three ingredients: Naked Whey, Naked Casein, and organic maltodextrin from tapioca. It's also non-GMO, gluten-free, and soy-free, catering to individuals with dietary restrictions. Additionally, it includes 11.5g of BCAAs per serving, which are crucial for muscle recovery and growth. Its unflavored nature makes it versatile for mixing into various shakes and recipes without altering taste.

The lack of added digestive enzymes might be a downside for those who experience digestive issues with high-calorie supplements. Additionally, with only 11 servings per 8-pound container, it may not be the most economical option for long-term use. Despite these drawbacks, Naked Mass stands out for its clean ingredient profile and high nutritional value, making it suitable for individuals focused on weight gain and muscle building.

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 designed for those seeking a high-calorie boost to support weight gain, providing more than 1,200 calories and 50 grams of protein per two-scoop serving. The carbohydrate content is quite high, at over 250 grams, which helps fuel energy and supports muscle growth but may be more than some users need if they are monitoring their sugar intake. The product includes 22 vitamins and minerals like Vitamin C and Zinc, which are nice additions for immune support.

It does not list any digestive enzymes, so those sensitive to digestion might want to be cautious or try a smaller amount first. The vanilla flavor is a common favorite and typically mixes well, especially when blended with fruits or nut butters for variety and extra calories. One downside is that the container offers only about 8 servings, which may not last long for daily use. Since this product has been discontinued, availability could be limited.

Serious Mass suits individuals needing a significant calorie and protein boost who don't mind a large serving size and want an easy way to add nutrients with some flexibility in flavor customization.