Courtesy of the author
Madeline Tolle for BI
This as-told-to essay is based on a conversation with Dr. Darshan Shah, the 53-year-old founder and CEO of longevity clinic Next Health, who's based in Malibu, California. It's been edited for length and clarity.
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Cavan Images/Getty Images/Cavan Images RF
Don Arnold/Getty Images
Only around 300 cases of so-called "keto rash" have been documented worldwide.