- care ▁products ▁though ▁both ▁offer ▁full ▁protection ▁from ▁the ▁sun . ▁ ▁Sun block — S un block ▁is ▁op aque ▁and ▁stronger ▁than ▁sun screen , ▁since ▁it ▁is ▁able ▁to ▁block ▁most ▁of ▁the ▁U VA / U VB ▁ray s ▁and ▁radiation ▁from ▁the ▁sun , ▁and ▁does ▁not ▁need ▁to ▁be ▁re app lied ▁several ▁times ▁in ▁a ▁day . ▁T itan ium ▁dio x ide ▁and ▁z inc ▁ox ide ▁are ▁two ▁of ▁the ▁important ▁ing red ients ▁in ▁sun block . ▁▁ ▁S uns creen — S uns creen ▁is ▁more ▁transparent ▁once ▁applied ▁to ▁the ▁skin ▁and ▁also ▁has ▁the ▁ability ▁to ▁protect ▁against ▁U VA / U VB ▁ray s , ▁although ▁the ▁sun screen ' s ▁ing red ients ▁have ▁the ▁ability ▁to ▁break ▁down ▁at ▁a ▁faster ▁rate ▁once ▁exposed ▁to ▁sun light , ▁and ▁some ▁of ▁the ▁radiation ▁is ▁able ▁to ▁pen et rate ▁to ▁the ▁skin . ▁In ▁order ▁for ▁sun screen ▁to ▁be ▁more ▁effective ▁it ▁is ▁necessary ▁to ▁consist ently ▁re apply ▁and ▁use ▁one ▁with ▁a ▁higher ▁sun ▁protection ▁factor . ▁ ▁Diet ▁ ▁Vit amin ▁A , ▁also ▁known ▁as ▁ret ino ids , ▁benefits ▁the ▁skin ▁by ▁normal izing ▁ker atin ization , ▁down reg ulating ▁se bum ▁production ▁which ▁cont ributes ▁to ▁ac ne , ▁and ▁revers ing ▁and ▁tre ating ▁phot od am age , ▁st ria e , ▁and ▁cell ul ite . ▁ ▁Vit amin ▁D ▁and ▁anal ogs ▁are ▁used