How long might someone live If they give up on eating? Eating only 100-200 calories a day and a few small glasses of fluids

1 Answer 1


The currently recognized world record in fasting - by drinking only water and taking multivitamin supplements - is 382 days by a 27 years old man who went from 207 to 82 kg in this time (Postgradual Medical Journal, 1973, Wikipedia). This was a medically supervised experiment and should be considered a gross exception.

For a healthy adult with normal initial weight eating nothing or 100-200 calories worth of food per day, the realistic period to survive and remain healthy would be about a month (Scientific American, BBC).

I can't answer this for a cancer patient (one of the tags in the question is "cancer"). It is known that some people have attempted to cure cancer by fasting; this is a matter of a personal belief; scientifically it is not recognized as successful treatment. Fasting may reduce the side effects of chemotherapy, though (Aging, 2009).

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.