Thoughts on INTERMITTENT FASTING?

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Hi! Just curious to know about the benefits of intermittent fasting from anyone who does this. I'm looking into the warrior diet, where there's a 4 hour feeding window (Thinking from 5-9pm). I usually don't get hungry until around that time anyway.
But then some say if you don't eat every few hours your metabolism slows down?
You don't see cavemen eating every few hours and they're fine lol. So I don't know.

Thoughts??