IF is my primary WOE. I did IF before I started going down the carb ladder. I learnt so much from "The Obesity Code", but when I fast I have only water, plain black coffee, plain green tea. I would only consider bone broth, cream in coffee etc were I to do extended fasting.

This is a blog from the owner of an IF Facebook Group. She does not promote low carb, but I follow her guidelines on "clean" daily fasting.

Gin Stephens on Clean Fasting