Its not so hard doing Eight Precepts and fasting from noon, while staying at a Wat, with the structure and time to slow down, burn less calories and meditate.
In daily life back at home or when traveling its more challenging.
A Middle Way of not eating at night on eg five or more nights per week, seems more realistic. The Buddha recommended not eating at night to his bhikkus.
You too should abstain from eating at night. Doing so, you’ll find that you’re healthy and well, nimble, strong, and living comfortably. MN 70
Presumably it was later the rules got even more restrictive with no eating after noon?
Even in the Buddhas day abstaining from eating at night wasn’t easy with some rebellious bhikkus showing the resistance to giving up meals:
“Reverends, we eat in the evening, the morning…
Doing so, we find that we’re healthy and well, nimble, strong, and living comfortably.
Why should we give up what is apparent in the present to chase after what takes effect over time?
We shall eat in the evening … MN 70 ”
Well if it was hard for bhikkus its much harder for lay followers.
Some studies may support the Buddhas dietary advice in certain aspects for some people at some times: Time-restricted Eating 2022
Possible benefits of Time Restricted Eating do indeed seem to occur with eating early and fasting in the evening. The benefits seem to take three months to appear, as the rebellious monks complained of.
Please share any practical tips for a longer overnight fast on most days?