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Currently you are able to watch "Generation Iron: Natty 4 Life" streaming on Amazon Prime Video. It is also possible to buy "Generation Iron: Natty 4 Life" on Apple TV as download or rent it on Apple TV online.
This next chapter in the flagship Generation Iron film series explores the controversial world of professional natural bodybuilding by following top pros competing for the Natural Olympia title in a league dedicated to ensuring all competitors are free of performance enhancing drugs. With drug use evolving at a rapid pace across sports and entertainment, natural bodybuilding as a whole has been criticized and questioned. Can the league guarantee that these competitors are truly natural?