For starters, IF doesn’t mean what we think it does. When we talk about Leangains’ 16:8 protocol or the 5:2 diet as methods of IF, the concept we’re really referring to is time-restricted feeding (TRF). In “The Longevity Diet,” Dr. Longo explains the label IF “represents a problematic direction because it allows people to improvise and pick and choose periods of fasting that range from 12 hours to weeks, giving the impression that… some ‘abstention from food’ is similar or equivalent

For starters, IF doesn’t mean what we think it does. When we talk about Leangains’ 16:8 protocol or the 5:2 diet as methods of IF, the concept we’re really referring to is time-restricted feeding (TRF). In “The Longevity Diet,” Dr. Longo explains the label IF “represents a problematic direction because it allows people to improvise and pick and choose periods of fasting that range from 12 hours to weeks, giving the impression that… some ‘abstention from food’ is similar or equivalent

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