The best prevention involves using good sun care practices, such as sunscreens, uv protective clothing, hats, and doing outdoor activities before 10 am and after 4 pm. A good topical antioxidant
helps to reduce the harmful effect of ultraviolet radiation that gets through a sunscreen
, and some does even with the best sunscreens.
See you dermatologist who can educate you on the best sunscreens etc.