What if the hormone that puts the brakes on muscle growth could be nudged in the right direction after 65? In a 12-week randomized trial of 96 healthy older women, combining circuit training with 5.5 g of essential amino acids twice daily produced the biggest shift in the follistatin/myostatin ratio. The combo group also gained muscle mass and saw broader drops in inflammatory markers. Here's the exact dose, the protocol, who it applies to, who should skip it, and what the study can't prove.
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