What is the best brand of sunscreen, in your experience?
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Are all sunscreens equally effective against UV radiation?
No. Some sunscreens protect against only one type of ultraviolet
radiation: ultraviolet-B (UVB). Others protect against both types of
ultraviolet radiation that reach earth's atmosphere from the sun: ultraviolet-B and ultraviolet-A (UVA). UVB rays account for only 5% of the UV rays reaching the surface of the earth. UVB rays cause sunburn and contribute to aging of skin, skin cancers, and hyperpigmentation. The majority
(about 95%) of UV rays that reach earth are UVA rays. While these are less potent than UVB rays, they are also thought to promote skin cancers and skin aging.
Sunscreens that protect against both UVA and UVB, and are thus
classified as "broad spectrum," are recommended for everyone. There are new regulations in labeling of sunscreen products that allow consumers to better understand the degree of protection offered by a given product.