John Romaniello is the New York Times bestselling fitness author of Man 2.0 Engineering the Alpha: A Real World Guide to an Unreal Life and a superhero fitness geek. He has been featured on programs such as Good Morning America, and is an adviser to nearly a dozen fitness and tech companies. On today’s episode of Bulletproof Radio, Dave and John talk about proper testosterone use, sleep cycles, chronotypes, understanding hormone levels and more. Enjoy the show!

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