Sunscreen works by either absorbing, reflecting, or scattering the sun's rays. UV filters contained in sunscreen are either organic or inorganic.
How Often Should You Reapply Sunscreen? Sunscreen's effectiveness, even water resistant sunscreen, has an ephemeral "skin-life". You will only receive the full protection advertised on the bottle if you apply it as often as needed.
Sunscreen DOES block vitamin D from being absorbed by the skin. It is a fact that for most people, sun exposure is the primary source of vitamin D.
Discover what SPF on sunscreen stands for, what the SPF numbers mean and a brief look at UV radiation as it affects our bodies.
Find a comprehensive list of all the professional sources referenced in this feature including professional journals, associations and government websites.
Sunscreen does NOT cause acne but it may aggravate acne if your brand contains particular ingredients.
Discover is sunscreen expires and a look at the chances that last's year's sunscreen is still potent.
Discover if sunscreen can whiten your skin and a look at what the labels mean.
Discover which is better sunblock or sunscreen and why combining the two is your best bet.