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Remedy · supplement

Protein supplement (whey)

Also: whey protein, protein powder, dietary protein supplement

Supplemental protein that amplifies the muscle gains from resistance training.

Evidence by condition

Each grade reflects the research for Protein supplement (whey) and that condition specifically.

Adequate protein is leucine-rich fuel for muscle protein synthesis, and supplementing it clearly augments resistance-training gains — especially in older adults, who often under-eat protein. As with creatine, the training is what does the heavy lifting; protein amplifies it.