How long can humans survive without food or water?

This will vary a lot from person to person, but the ‘rule of three’ is generally valid: 3 days without drink and three weeks without food.

Tibi Puiu by Tibi Puiu July 8, 2020

Despite what was some new age gurus might claim, humans aren’t light beings that can subsist on air and sunshine alone. Like all creatures, we require food and water to survive.

Typically, humans can go without food for about three weeks before the effects of starvation on the body kill a person. But since the adult body is made of 60% water, typically a person would only last three to four days without a drop of water.

These are average values, however. There are outliers who have managed to survive for longer without food or drink. How long a person can last without access to calories and liquids depends on many factors, such as environmental conditions and a person’s underlying health.

For instance, lacking access to water in the desert under the broiling sun will kill a person much faster than in the middle of the forest where it’s much cooler.

More:
https://www.zmescience.com/other/feature-post/how-long-survive-no-food-water-052352/