A study found: this is the diet that will make you reduce two and a half years from your biological age. The diet involves eating less than 1,000 calories, and consists of low-fat foods, soups, energy drinks and supplements.

This diet makes the body think it is fasting, which causes the release of enzymes and other chemicals in the body that are related to longevity. Researchers believe that this diet has a rejuvenating effect on the immune system. According to the researchers, this diet also switches cells throughout the body to a protected 'anti-aging state'