The longest fasting record in the existing medical research records in the world-382 days. The record holder is Angus Barbier, a 27-year-old Scottish brother. During the period from 1965 to 1966, he was reduced from 207 kg to 82 kg through complete fasting, and he was … alive. Don't eat anything during fasting, just drink water and some calorie-free drinks. The doctor asked to take vitamins, potassium, sodium and other mineral supplements, but did not take other drugs. However, AB really persisted and lost weight quickly. More interestingly, hunger didn't bring much discomfort to AB. I think he's really going against the sky.