Precautions for sun protection

April 9, 2023
The key to the function of whitening care products is to make every effort to cross the stratum corneum and enter the deeper layers of the skin, while a truly attentive sunscreen should stay on the surface of the skin to protect against UVA and UVB, which can cause damage to the skin once it crosses the stratum corneum. Therefore, whitening sunscreen should be separated. Now let me tell you the unknown side of the sunscreen, you can pay attention to it.

Sun Protection Summary

UVB can make the skin a short time sunburn, sun red. uva with a long wavelength, strong penetrating ability, can penetrate the skin surface, deep into the dermis below the tissue, destroy collagen, elastic fiber tissue and other skin internal microstructure, so that the skin wrinkles and young lines, so that the skin sagging aging.

Is the higher the sun protection factor, the safer it is?

Q: In the harsh environment of global warming and UV rays, is the higher the sun protection factor, the safer it is? A: The choice of sunscreen value depends on the actual demand, if the daily only on the work, stay in the office all day indeed no need to choose SPF50 sunscreen. Many people reject high factor sunscreen products because of safety considerations. But the fact is, not high sun protection factor is equal to high risk burden. The real concern is: the factor is not high, but the proportion of sunscreen added high; factor is high but there is no function to prevent the ingredients from penetrating into the skin; in order to ensure a refreshing texture, ignore the easy loss of control ingredients.

SPF and PA indistinguishable

Q: want to not be tanned old, only look at the SPF value is not enough, PA is the key? A: Generally speaking, sunscreens made of physical powders, such as titanium dioxide and zinc oxide, can definitely block both UVA and UVB, while sunscreens with high SPF values usually also have high PA values.

The correct time to apply sunscreen

Q: Apply sunscreen fifteen minutes before going out to work effectively? A: Most of the sunscreens used in summer have waterproof and sweatproof functions. The purpose of applying it in advance is to let the non-sunscreen component of the lotion partially evaporate so that the sunscreen component can adhere tightly to the skin, so it is best to take slightly longer than 15 minutes. But for the winter and indoor use of sunscreen does not have a waterproof function, early application in addition to increasing the burden on the skin, there is no benefit.

Sunscreen frequency

Q: Sunscreens are lost with sweat, etc., so should I reapply every two hours? A: If the sunscreen is good enough to prevent penetration and there is no significant loss, there is no need to reapply.
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