Choosing Sunscreen

Sunscreen – The most common classification system for sun protection in the United States is the protection factor or SPF system burns. SPF is a measure of the effectiveness of a particular sunscreen can prevent a person from getting sunburned. – Sunscreen

Theoretically, an SPF number indicates how many times more radiation than the skin of a person can hold with sunscreen than without. For example, a sunscreen with an SPF 15 would allow a person to stay in the sun 15 times longer without burning. – DDF Enhancing Sun Protection

Of course, in practice, a multitude of other factors that may influence the effectiveness of any sunscreen. Absorption through the skin or contact with water, for example, you can essentially remove the sunscreen from the skin surface, reducing its effectiveness over time. – Sunscreen

SPF Ratings also take into account the fact that there are two types of harmful ultraviolet rays – UVA and UVB rays. While UVB rays cause sunburn and increase the risk of developing squamous cell carcinoma (SCC) and basal cell carcinoma (BCC), two common types of skin cancer, UVA rays cause tanning and can cause damage to DNA leads to malignant melanoma, a rare but deadly form of skin cancer. – Sunscreen

The bad news? Although most sunscreens provide significant amounts of protection against UVB rays, the vast majority offer little or no protection against UVA. Also, since SPF is measured against the risk of burns, does not provide information on the effectiveness of a product works in the spectrum of UVA rays. – Sunscreen

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