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Circadian Rhythm Fasting

New faster here, 37/f, been experimenting with 16:8 and ‘Circadian rhythm fast’ (on Zero app) which seems to be 13 fasted hours.

Query: does the fasted period lengthen as we move into winter? (& is there any research to support a longer fasted time when daylight is shorter?)

I’m in Midlands UK so shortest days are about 7.5hrs long.

Apols if this has been asked before!

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Answer

Oh and for context, I’m 61kg, 5ft 10, looking to gain muscle if anything.Eat a mixed diet but aiming towards higher protein and fat where possible. Fasting for mental clarity, and metabolic flexibility.

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