How long can a person sustain himself without water and food? Theoretically, the body can only stop working when it has depleted its stores of fat, protein and carbohydrates and is depleted of energy. The nutritional doctor who guided him through the post-starvation restorative diet in 2003, Dr. Jeremy Powell, who performed the hunger strike in London in 2003, said that the body can only work for so long if it is depleted of fat, protein and carbohydrates. Powell? Teck believes that life does not need to wait until physical energy is completely exhausted: “He is likely to have long gone to the West.” Obese people may live longer, provided there is enough water-soluble vitamin B in the body to help convert the stored fat. Therefore, it is likely that a person has died of starvation, while the torso is still obese. The record for the longest period of time without food was set by Irish hunger striker Kieran Doherty. Doherty, who passed away in 1981 after 73 days without eating a single morsel of rice. With water and vitamin supplements, some people have gone without food for more than a year. Powell? Teck explained, “More than 30 years ago, it was a very fashionable way to lose weight.” If there are only vitamins and no drinking water, the survival time will be greatly reduced. A person can expect to make it through weeks without food, but can only last a few days without water to drink. Michael of the U.S. Army Environmental Medicine Institute in Nettico, Massachusetts? Savarka said: “It depends on the rate of water loss.” Lack of water, the amount of blood in the body will drop, and blood pressure will also be lowered. The blood will become increasingly sticky, resulting in blood not being transported around the body, and in compensation the person’s heart rate will accelerate. Even in a cool environment, a person cannot support himself for more than a week at most without drinking water.