Can plant protein really build muscle like whey? A 12-week trial of 161 men put pea protein, whey, and placebo head-to-head, and the beginner results turned heads: +20.2% biceps thickness for pea versus +8.6% for placebo. But the full-group difference was only a trend, and the standout finding came from a subgroup analysis. Here's what the study found, what it didn't prove, and how vegan or lactose-intolerant lifters can use it.
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