Last I read, the evidence that fasting is beneficial beyond the caloric restriction is controversial at best. I would like to see you back up the claim with strong evidence.

> A Systematic Review and Meta-Analysis of Randomized Clinical Trials

>"despite these short-term benefits, FBS did not show superior long-term outcomes compared to CCR."

https://pubmed.ncbi.nlm.nih.gov/39458528/

> Anything that kicks off your metabolism will make it not fasting.

That's the key part. Black coffee is key. I also sometimes go with tea or fruit infused water.

Isn’t a caloric deficit implicitly fasting though? Guessing there’s number of calories / time formula there.