Lol, Where I'm from, whenever you are fasting, it literallly means You're conducting a prayer also.. Fasting goes err'where prayer goes.
This article thus seem much explained as you pointed out fasting does not heal, drugs does, it only aid recuperation.

Lets assume an ignorant man is sick, he decided to fast and pray while also using his drugs. He gets healed earlier than he expected. All he instantly believes is that his prayers were answered 😂😂 thats where I'm from.
PS: am not in any way against miracle/religion oh. Just saying Nature/Science deserves some credence.
About Leptin, we coined a quote for it in my class then "Whenever your leptin level rises, you'll stop eating" lol

Thanks for the post.. Gained something.