Yes, I know its silly to ask same question, what happens in your body every week to AI. Answers are mostly Same but Just to re-enforce idea, of what you body currently undergoing every few hrs helped me. For example, I watched "What happens with 36hr water fasting youtube video" every time I go on fast - It somehow keep right kind of mindset during fasting. similar to this: https://www.youtube.com/watch?v=URSwRHb4Uv0

Yes, definitely dont take medical advice from LLM. Only thing, I suggest is taking food, which foods to take or skip. And also random questions to keep you on track with fasting. like "what happens if I take tiny fruit juice - does it break the fast etc"

If you end your water fasts at 48h circa, you're missing out on most of the benefits as the body fully enters fasting mode past 36h-48h. So in a sense you're ending the fast when it is just getting started.

Can't give you medical advice, just a benchmark tip: a short water fast is 3-5 days, the first 2 days being the most difficult ones.

My personal experience is that mind/spirit plays a major role. If i'm down mentally, i'll break my fast prematurely. If you think about it, the only difference between fasting and starving are your motives and mindset. So this is a major item, that people approching fasting from a purely medical angle often fail to appreciate.

Make sure you are at peace, and embracing a mindset of healing, spiritual renewal. Have something to do. For example, as a Christian, this is a time where I'll read the Bible, sing/workship more frequently throughout the day, and of course rest. You can do something equivalent independently from your religion.

I don't know if this mental angle can help with your headaches, but consider giving it some though in case this can help. That's all i can think of i'm afraid. Just my 2 cents.

Headache goes away after few days when body switches to full ketosis.

I did several one month water water fast, the brain sharpen after a week usually. And I stars getting headaches agents below 10% body fat.

To be honest, for me the result is quite unbelievable. I never thought I'll lose 14kg in my mid 40's but managed to do it with very little exercise and following water fasting and mostly focused on diet, its surprising.

Looking back, when I was not remote working, I did intermittent fasting by default (not eating between 8pm to 11:30am), that kept my health in control. But WFH changed everything and gained weight.

That is true presuming that the author does not intend to keep this fasting regime up after they reach their goal weight. There are certainly people who do long fasts on a regular basis.

My experience is the opposite. Fasting is great to stop cravings making it much easier to eat healthier when braking the fast.