The Game Changers is a 2018 documentary film about the benefits of plant-based eating for athletes. It covers multiple success stories of plant-based athletes, references scientific studies, and touches on other arguments for plant-based diets that extend to non-athletes.
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note the section starting at 43:24 minutes claiming "early humans ate mostly plants'' followed by
''human ancestors were nearly all vegetarians"
available on youtube, netflix and
https://yts.lt/