Can Longevity Be Increased By Eating Less?

A recent study by St. Louis University revealed that cutting back on calories may assist in slowing aging. The results, published in the June 2008 issue of Rejuvenation Research, are based on a year long study of healthy but sedentary non-smoking volunteers comprised of 50 to 60 year old men and post-menopausal women. Participants were divided into three groups: one comprised of reducing daily caloric intake by 300-500 calories; a second group remained on their regular diet and participated in a consistent exercise regimen; a third group maintained their normal routine. Participants in the reduced calorie and exercise groups both lost body fat mass. Those in the reduced calorie group also had lower levels of the thyroid hormone triiodothyronine (T3). Some have theorized that reducing caloric intake decreases production of T3, which may then slow metabolism and tissue aging. Additional studies in rats and mice have shown that reducing caloric intake does slow the aging process. According to the study lead author Edward Weiss, "Our research provides evidence that calorie restriction does work in humans like it has been shown to work in animals...the next step is to determine if this in fact slows age-related tissue deterioration. The only way to be certain is to do a long term study." In the meantime, attaining and maintaining a healthy weight, eating a reasonable diet, incorporating physical activity and some means of stress reduction have all been proven to promote a healthier you.