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The American Academy of Dermatology recommends using a sunscreen that offers a minimum protection of SPF 30, broad-spectrum coverage so it will properly defend against UVA and UVB rays, both of ...
According to the MD Anderson Cancer Center, an SPF 15 sunscreen blocks 93% of the sun’s harmful UVB rays, and SPF 30 blocks 97%. Once you get higher than that, you’re only getting a small ...
Levin also cautions people this summer to seek shade during peak sun (10 a.m. to 4 p.m.) and avoid tanning beds as they're also associated with significant skin cancer risk.
The UVA seal used in the EU A tube of SPF 15 sun lotion. As part of revised guidelines for sunscreens in the EU, there is a requirement to provide the consumer with a minimum level of UVA protection in relation to the SPF. This should be a UVA protection factor of at least 1/3 of the SPF to carry the UVA seal. [90]
While this offers strong protection, many chemical SPF naysayers point out that the very nature of these ingredients draws the damaging rays further into the skin, potentially causing more sun damage.
UPF (ultraviolet protection factor) represents the ratio of sunburn-causing UV without and with the protection of the fabric, similar to SPF (sun protection factor) ratings for sunscreen. While standard summer fabrics have UPF ~6, sun protective clothing typically has UPF ~30, which means that only 1 out of ~30 units of UV will pass through (~3%).
As SPF levels increase beyond 50, the formulations tend to be thicker and leave a chalkier appearance, and most people will under compensate that white chalkiness by not utilizing the right amount ...
To make sure you are adequately protecting your skin from damaging rays, dermatologists say this is the exact amount of sunscreen to slather on. Plus, tips on how to reapply.