My experience with fat fasting is that all fats are not created equal and how the individual body reacts is also different. Only you will be able to tell what works for you.

Eating mostly fat, but keeping the calories low means that you don't get to eat much. Also, they say you need to already be keto adapted.

Two fats work best for me: Chicken skin chips and macadamia nuts.

Good luck and I hope some others also share their fat fast experiences with you.