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.

Naked Vegan Mass is a plant-based weight gainer designed for those looking to add calories and protein cleanly, without artificial additives. Each serving provides 1,230 calories, making it excellent for people who struggle to consume enough energy to gain weight. With 40g of protein sourced from a blend of pea and rice proteins, it offers a complete amino acid profile that supports muscle growth effectively. The carbohydrate content is high at 245g per serving, using gluten-free tapioca maltodextrin as a clean source of complex carbs, which is a better choice than wheat-based carbs for those avoiding gluten.

Fat content is low, coming mainly from organic coconut sugar, which keeps the formula simple and focused on gaining lean mass. The product does not include digestive enzymes, which might affect digestion for some users when consuming such a dense shake. The vanilla flavor is mild and easy to mix, allowing you to customize shakes with fruits or other ingredients to suit your taste. While it is free from soy, gluten, dairy, and GMOs, the flavor options are limited to vanilla only.

This product is ideal for vegans and vegetarians who want a clean, high-calorie supplement without artificial ingredients and works best when combined with a solid weightlifting routine for muscle gain.

Serious Mass Strawberry Weight Gain Protein Powder is designed to help those looking to gain weight and build muscle with an easy calorie boost. Each serving packs a hefty 1,250 calories, making it suitable for individuals who struggle to eat enough through regular meals. It offers 50 grams of protein from whey, which supports muscle growth. The carb content is very high, over 250 grams, mostly from complex sources without added sugar, providing energy and aiding in weight gain.

One notable benefit is the inclusion of creatine, glutamine, and glutamic acid, which can help with muscle recovery and overall workout performance. It also contains 25 essential vitamins and minerals, which is a nice bonus for overall nutrition. The strawberry flavor is reported as tasty and generally mixes well, which is important since some mass gainers can be chalky or clumpy.

This powder is best suited for active individuals or athletes who need a significant calorie surplus to gain weight. Those new to mass gainers or with lower calorie needs might find the servings too large or heavy. Serious Mass delivers a powerful calorie and protein punch along with extra nutrients, making it a solid choice for serious weight gain goals, provided you can handle the volume and rich calorie content.