Be Wary of High SPF Factors

Fall 2009 CSANews Issue 72  |  Posted date : Sep 22, 2009.Back to list

SPF 80 is not twice as strong as SPF 40. In fact, SPF 40 blocks out 97% of the ultraviolet-B (UVB) radiation and SPF 80 blocks out 99% of UVB radiation. SPF factors of 15 to 30 are quite adequate for most people. SPF only applies to the level of protection for UVB rays and does not apply to UVA protection. The ingredients that you should look for on a bottle of sunscreen to protect your skin from cancer-causing ultraviolet-A (UVA) radiation are zinc oxide, titanium dioxide, avobenzone or Mexoryl. The most effective way to ensure proper protection is to reapply the spray or lotion generously every two hours in order to achieve the desired results.