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Many people may be tempted to craft their own sunscreens out of all-natural ingredients. However, such creams will likely fail to offer any protection.
The Centers for Disease Control and Prevention (CDC) note that having “a history of sunburns, especially early in life,” can increase the risk of developing skin cancer. Thus, it is important to wear sunscreen that is tested and proven to be effective, from childhood onward, whenever exposed to strong sun.
Currently, the American Academy of Dermatology recommend using sunscreen that offers broad-spectrum protection — that is, protection against both UVA and UVB rays. It should also be SPF 30 or higher and water-resistant.
The same guidelines state that adults should apply about 1 ounce of sunscreen all over their skin. Individuals should reapply the cream once every couple of hours when out in the sun and even more frequently if they go swimming or become sweaty.