Three and a half weeks, 25 days.

More than forty years ago I was lost in the wilderness on a school camp. Broke both ankles and couldn’t walk. Drank water from a stream and waited.

~72 hours. I think I went beyond that, but gave up because there’s diminishing returns for fasting that long, that is, your body starts shutting down in a way that eating again after that period can be dangerous if not done very slowly with like bone broth or whatever.
Mind you, it’s not easy fasting what with it being impossible not to flush out electrolytes, so making sure you get enough salt, magnesium and potassium supplements is a must. Obviously, other vitamin supplements doesn’t hurt. The only dangerous one is potassium, so make sure the dosage is right. Oh, and there ought to be enough calcium in the tablets alone if you take vitamins daily and depending on where you live, if the water is hard enough (like here in Denmark), that’s another source.

Probably around 72 hours. I had a severe bout of depression a decade ago. I’m not certain how long I went without food because my memory of that period is hazy, but I barely ate or left my bed for a week. A few years before that I had salmonella poisoning (do NOT recommend) and didn’t eat or really even sleep for something like 10 days. I drank sugar water and electrolytes to stay alive but I still lost about 10 kilos.

It depends on whether you’re working or just slacking off. I think i’ve gone for 60 hours without eating, but that was when i was a teenager and bed-rotting and just didn’t care about eating properly.

Now, i don’t do that anymore. While being active (going to school, working), i guess it’s less than 24 hours.

Less than 48 hours, I’m sure, and I’ve been homeless.

Something like 36 hours without food, and around 12 hours without water in prep for surgery. I was delirious the last several hours.

Around 30 hour when my great grand mother died.

When I was in high school I went 48 hours just as an experiment when my mom went out of town. Now that I have GERD I don’t think I could make it that long again though

About 30 days.

Something like 65 hours. I used to routinely do 3 day fasts when I was working out a lot. But routinely like every 3 to 6 months. They are very hard to sleep and be functioning on.

A few 24 hour periods for surgery. I’ve gone at least 48 hours without eating, it made me feel pretty rotten

From a Sunday lunch through dinner Wednesday evening.

Not a purposeful fast, I just had a huge hours-long meal of endless samples of steak, lamb, and chicken at a Brazilian Steakhouse. Also several large salads, and a small dessert.

So anyway, I just wasn’t hungry for days after that. I didn’t have any constipation, no drop in energy, so I went about my business as usual, but without eating for a few days.

At Ramadan

Wake up, eat breakfast at 4 am Go to work, come back home Fall asleep, don’t wake up at the correct time, Come home, fall asleep, wake up late once more, break my fast because I gave up

4:00 to 21:00, sleep from 16:00 to 5:00, forget to break the fast, 6:00 to 20:00, finally break the fast

17 hours + 12 hours = about 30 hours

Even more if you include sleep (45 hours)

I used to fast 36 hours a week, but I am sure the 4 day migraines are the longest (can’t even drink water without puking). Unless it was that one time we all got the flu, 10 days, but we did drink stuff with calories to stay alive.

So:

From poverty or ED never more than a day. Plenty of skipped meals and undereating but no long stretches with nothing.

Voluntarily fasting, only a couple of days

From sickness 4 days or 10 days, depending on how you define not eating.

32 hours after making a dumb bet. It messed up my appetite for months afterwards. I got $20 though. Not worth it.