It used to be that there would be days where our ancestors would not be able to bring home any meat so fasting probably was built in as part of our metabolism process.
It was only in the past 100 years that we've seen mass produced sugary food and drinks.
Like the diet difference is painfully obvious when you go to Japan's 7-11. Healthy stuff all around compared to deep fried fast food.
Some days I will only eat 1 meal, and I honestly feel great. The biggest difference being I have way more energy and just feel "light".
These days I've converted to mostly Korean food consisting of rice and veggie side dishes incl kimchi of course. I've lost 4kg within 3 weeks just by changing diet.
Of course can't resist the burger and fries once in a while....but eating primarily Korean food because I'm Korean I realize is the wise choice....our ancestors have been eating the same stuff for millenias so it's probably "right" for my metabolism.
there's a study that showed East-Asian men living in North America have high rate of prostate related issues which has traditionally never been prevalent in East Asia...and also the rise of American fast food chains have collectively made the world a lot less healthier with the increase of diabetes and obesity.