Supplements
We research and compare the best fitness supplements available on Amazon, from protein powders to pre-workouts.
All picks
Optimum Nutrition Gold Standard 100% Whey Protein
Optimum Nutrition Gold Standard is the most evaluated whey protein on the market and remains the benchmark for a reason. Each serving delivers 24g of protein from a blend of whey isolate, concentrate, and peptides. It mixes smoothly, the flavor range is extensive, and third-party lab results consistently verify label claims. Our research confirms it is the safest default choice for most athletes.
Premier Protein Shake 12-Pack (11.5 fl oz)
Premier Protein shakes are the most convenient way to hit your protein goals. Each 11.5oz bottle packs 30g of protein with only 1g of sugar and 160 calories. They require no mixing, no cleanup, and taste good straight from the fridge. According to owner feedback, the Chocolate and Vanilla flavors are the most popular, and the Caramel is a sleeper favorite.
Cellucor C4 Original Pre-Workout Powder
C4 Original is the best-selling pre-workout on Amazon and a solid starting point for anyone new to pre-workout supplements. The 150mg caffeine dose provides energy without the jitters many competitors cause, and the beta-alanine and creatine nitrate formula supports endurance. Based on our research, the Watermelon and Icy Blue Razz flavors receive the highest marks from owners.
Garden of Life Organic Plant-Based Protein Powder
Garden of Life Organic is the best plant-based protein we evaluated. The blend of pea, brown rice, and seed proteins delivers a complete amino acid profile with 22g per serving. It is USDA Organic, Non-GMO Project verified, and free of artificial sweeteners. The Vanilla flavor mixes well into smoothies, though the texture is grainier than whey — a characteristic of all plant proteins.
XTEND Original BCAA Powder
XTEND Original is the top-selling BCAA supplement on Amazon and the most evaluated recovery drink in our comparison. The 7g BCAA blend supports muscle recovery, the added electrolytes aid hydration during workouts, and the sugar-free formula keeps calories at zero. Our research found that the Mango Madness and Blue Raspberry Ice flavors consistently receive the highest ratings.