Everything You Didn't Know About the Sunscreen You Bought
You bought the sunscreen with the highest number, but do you really know what it means? What is important to know when purchasing sunscreen?
There are two types of sun rays: UVA and UVB. The term "SPF" measures the sunscreen's ability to filter UVB rays, which are associated with sunburn and skin cancer, only. UVA rays, which are no less dangerous, are also linked to an increased risk of skin cancer. However, they are not filtered by the ozone. Although UVA rays do not cause sunburn, they lead to tanning and aging and penetrate more deeply into the skin, significantly impacting collagen, which maintains the skin's elasticity.
There are many types of sunscreens available, but only if the phrase "broad spectrum" appears, does the cream provide protection from UVA as well as UVB rays.
The numbers associated with SPF mean that the user can stay in the sun for that many times longer without the skin color changing as it would without sunscreen. For example: SPF 15 means you can stay in the sun 15 times longer, while SPF 30 means you can stay 30 times longer. Contrary to common belief, SPF 30 does not offer double the protection of SPF 15. The difference in protection levels is only about 2 percent.
In conclusion, the most important factor when purchasing sunscreen is the phrase "broad spectrum." SPF 30 is excellent and sufficient. The sunscreen should be water-resistant, and you should reapply it every few hours and use a generous amount.
