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Comment by mensetmanusman | Hacker News Reader

During intermittent fasting, an hour after my morning coffee, sometimes I set a recurring hour timer and drink a full water bottle on the hour. After about the fourth or fifth hour I get this really interesting sense of being hyper alert/awake.

It’s essentially the opposite of how I felt when I used to eat lunch and would get tired/slow.

This is more doable during WFH since I wouldn’t get noticed going to the restroom so often…

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A lot of water is probably not a good thing while fasting.

The easiest fasts I ever done were dry fasts. The hardest was with a lot of water.

However since I got a kidney stone after dry fasting (I have no 100% proof it's correlated but it was close to a fast and it never happened before or after) I now drink a little bit of water while fasting (something like 300 ml per day, I do several days fasts, not intermittent).

I have never heard of dry fasting. It sounds pretty dangerous.

It’s not intense fasting, just the ‘only eat from 5-9pm’ daily type. I definitely feel better drinking water than not though, so it may vary by body type.

My doctor told me kidney stones are very closely associated with mild dehydration. I’ve upped my water consumption and never had another (yet).

Water is almost never bad for you, except in very large amounts.

You absolutely need to drink more water/tea than usual while fasting and this is pretty much recommended at least by most professionals is the survival sector (probably by more, but in this case I know for sure). Especially if you need to get things done; while having no food drinking is even more important.

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