Muscle-building claims evidence brief
Epicatechin is a cocoa-derived flavanol marketed for myostatin reduction, muscle growth, blood flow, and endurance. The bodybuilding claims are much stronger than the human evidence.
Cocoa flavanol and epicatechin data are not strong enough to support muscle-building or myostatin-blocker marketing.
Human trials do not establish myostatin-blocking or muscle-building effects; cocoa-flavanol exercise data are indirect.
Products vary between isolated epicatechin, cocoa extracts, and flavanol blends; these are not interchangeable.
Human evidence is small, population-specific, and includes possible training-adaptation concerns.
Source Drawer
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
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