It seems the data on drinking black coffee during your fasting window for autophagy is not clear.
Does anyone here know a bit of information on the effect of black coffee during your fasting window?
Would it interfere the benefits of fasting like lowering blood glucose, etc.?
From what I remember, drinking coffee increases cortisol, which increases blood glucose. I can’t find specific data point studies about it other than over a week, the group that consumed coffee had an 8 percent higher blood glucose level. Also That coffee use had the potential to reduce insulin sensitivity but also decrease the risk of diabetes.
Anecdotally, I’ve been gulping pots of coffee for ten years and everything’s fine, still lean, still sleeping well. Even if you have a genetic test that tells you if you’re a fast metabolizer, I think you need to try for yourself and see what works.