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It's fairly easy to lose weight by not eating anything for a few weeks (only first 1-3 days are tougher) though one risks developing vitamin & electrolyte deficiency that resembles effects of a major viral infection. Another way is to do HIIT but doing that properly is out of reach for most overweight people.

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That sounds like pretty much the opposite of an healthy eating behavior.

Healthy eating won't lead you to lose weight without losing your muscles. Radical fasting is the only known way to lose weight and mostly preserve muscles. Also, one could argue that historically people alternated between feast and famine (and you can still see it in some less developed countries these days) and we have the ability to run on our own fat for longer periods of time. Why else would we store fat?

Skipping meals like this is a sign of an eating disorder.

It can be. But could also be a fasting protocol. I’ve been doing rolling fasts for months now and it works great when you’re severely overweight.

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