To apply sunscreen to your back, enlist someone else, which has been shown in at least one study to provide significantly better protection compared with doing an application yourself. That study ...

Don’t be stingy with your sunscreen. Apply a generous amount(Up to one and a half tablespoons equivalent for the entire face) ( upto one and a half tablespoons for the whole face) and additional ...

For example, one study randomized 28 patients with AK to topically apply sunscreens (SPF 50+) with DNA repair enzymes (1% photolyase and 1% endonuclease) or sunscreen alone for 6 months.

It should be noted that at least one study [2] has documented that consumers typically under-apply sunscreens at a rate of less than 50% that required for the basis of the official SPF test (2mg ...