An essential trace element which is necessary for growth and protein synthesis, selenium acts as an antioxidant to protect cells from free radical damage that may contribute to aging and many age-related diseases. Johns Hopkins University of Public Health (Maryland, USA) researchers studied more than 13,800 subjects for 12 years, and found that a modest selenium level, between 130 and 150 ng/mL, associated with a reduced risk of death from all causes, including cancer and cardiovascular disease.

Be sure to incorporate selenium-rich foods into your daily diet.  Brazil nuts are the richest dietary source of selenium.  The mineral is also found in organ meats, tuna, seafood, brewer's yeast, fresh garlic, mushrooms, wheat germ, and some whole grains.