Will a 17 Hour Fast Put Me in Ketosis? Understanding the Metabolic Switch
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3 min read
According to Johns Hopkins neuroscientist Mark Mattson, our bodies evolved to go without food for many hours, switching from burning sugar to stored fat for energy, a process called 'metabolic switching'. A 17-hour fast is a popular form of intermittent fasting that leverages this ancient survival mechanism, but whether it induces full ketosis depends heavily on individual factors.