Naked Nutrition's Naked Mass claimed the top ranking in a 2026 evaluation of mass gainer protein powders, outperforming more than 35 competing products on ingredient transparency, protein sourcing, and third-party testing at a calorie density suited to hardgainers. Vegan Naked Mass, the plant-based version, placed second, and Transparent Labs Mass Gainer rounded out the top three based on ingredient cleanliness and carbohydrate source diversity. The rankings emerge as the mass gainer category continues to see wide variation in quality. Products in this segment commonly deliver between 500 and 2,000-plus calories per serving, with many relying heavily on maltodextrin and artificial additives to inexpensively achieve calorie density. Background: What a Mass Gainer Is A mass gainer is a high-calorie supplement formulated to help consumers increase daily caloric intake through a combination of protein, carbohydrates, and fat in a single serving.…