2. A low-calorie diet
Calorie restriction—lowering your average daily caloric intake by about 20 to 30 percent—has been making headlines for years for its promise (primarily based on animal studies) to lengthen people’s lives. According to Stone, actor George Burns, who lived a long and healthy life, dying in 1996 at the age of 100, may have practised calorie restriction. And recent studies have shown that eating less could lower your risk of aging-related diseases such as cardiovascular disease, diabetes and possibly even Alzheimer’s disease.