Hello, Free radicals are, in general terms, molecules resulting from the normal metabolic processes in the body (or environmental exposures) but they are highly unstable and highly reactive. They are also known as oxidative agents . They can damage the DNA, proteins, carbohydrates, lipids and are thus involved in many diseases. The body reacts to free radicals through antioxidative processes, and thus a balance between oxidants and antioxidants is needed for maintaining good health. When free radicals are not opposed optimally by antioxidants then oxidative stress takes place, which impairs health and enhances disease. In this context, and since free radicals are produced on a regular basis, any food or supplement that increases antioxidant activity has beneficial effects for the health. Literature findings suggest that free radical production increases with age. It is why natural antioxidants and supplements having antioxidant properties are more important for advanced age persons. Selenium is well-known for its antioxidant properties. Good natural sources of selenium include eggs, poultry, meat, fish, Brazil nuts, etcetera. Vitamin D is recommended for women at your age because it can improve calcium retention in the body and enhance bone structure and strength. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Ervin Toçi