[m348e912]

You bring up some interesting points. I've dabbled with fasting in the past and it seems to be relatively safe and beneficial up to 10 days but there are two mistakes I see people make.

Mistake 1: Drinking pure water. Your body does need some specific minerals even when fasting. Cole Robinson, a fasting focused youtuber (who is not for everyone), has shared a Magnesium, Sodium, Potassium, Sodium Bicarbonate & Water recipe he calls Snake Juice that keeps electrolytes steady during a fast.

Mistake 2: Drinking liquids that break the fast. I've watched youtube videos of fasters add things like diet soda, gatorade, and even jello to their fast. That defeats the whole purpose and negates any positive effect.

[godshatter]

Diet sodas get a bad rap and for good reason, but I've been unable to stick with anything other than diet soda long term (though I've tried multiple times). I know that diet sodas can spike blood sugar in some people, but it doesn't break me out of ketosis when fasting. YMMV.

[m348e912]

Just my perspective, but I think diet soda certainly breaks a fast. I can see how it could potentially not affect ketosis, but as far as fasting goes, water & minerals are truly the way to go. I will also concede a true "water" fast makes the fast much harder, although I think that's part of the experience. It's not supposed to be easy.