Solve 5 confusing sun protection problems! Is physical sunscreen better? The higher SPF, better?

Whether in recent years, boys or girls have begun to pay attention to "sunscreen and anti-aging products", many people still do not understand how to apply sunscreen. For example, more layers of sunscreen, better effect? The higher SPF, better? Do I need to apply sunscreen beforehand to be effective? Let's debunk 5 myths about sun protection together, and in future we must master good habits of sun protection.

The effect of sunscreen is mostly related to "whether amount of sunscreen used is enough" and has little to do with number of layers applied. When choosing a sunscreen, in addition to paying attention to protective ability of SPF and PA index, you should also be careful if amount of sunscreen you use is up to standard. “The standard amount of sunscreen used in sunscreen strength testing is 2mg. per square centimeter. If this amount cannot be achieved, it means that sun protection effect of SPF and PA index indicated on product cannot be achieved."

If it's a face and neck, you'll need a dime-sized sunscreen, or you can make a gesture of youth by squeezing your index and middle fingers; The number of body parts is roughly equal to number of one soybean on palm of one hand, and hands are about nine palms in size, that is, nine soybeans are enough.

So if sunscreen is applied over base makeup, flakes will appear, but effect of sunscreen will actually weaken, so more attention can be paid.

Many people think that buying a product with highest SPF is most economical, but in fact, when choosing an SPF, you should consider occasion and UV factor of day. If you are mostly indoors, you do not need to use a high factor sunscreen. SPF25~30 is sufficient, but if there are other outdoor occasions, you may need to choose a product with a higher SPF.

In addition, quality of leather is also one of considerations when choosing products. High SPF sunscreens tend to be thicker in texture and may not be suitable for acne-prone skin types, high SPF sunscreens require make-up removal, and sensitive skin may require make-up removal once a day. This will increase irritation, so doctors suggest that for sensitive/alcoholic skin, hats and umbrellas can be used to achieve first level of protection.

The main difference between physical sunscreen and chemical sunscreen is that "physical sunscreen reflects light" while "chemical sunscreen absorbs light." Generally speaking, chemical sunscreen is more effective. However, if skin type is male skin/sensitive skin, it is not recommended to use a chemical sunscreen as it will generate energy to stimulate skin when it absorbs light, and using a physical sunscreen will more efficient.

In fact, in addition to skin of face and body, hair and sun protection are also very important. If you go outside, you can wear an umbrella or a hat to protect yourself from sun. more complete.

Indoors, you still have to look at your environment to make a decision, because UVA rays can penetrate clouds and glass. If seat is far from window or there are thick curtains and curtains on window, then you should not worry. But if you'll be exposed to halogen lights and UV lights at work, you still need to wear sunscreen. On cloudy days, there will still be UV rays, so you can check UV index of day to determine degree of protection from the sun. A UV index of 0-2 is not dangerous for ordinary people, so you do not need to use sunscreen.

In fact, sunscreens begin to work immediately after their application. It is recommended to apply them 15 minutes or half an hour earlier, since the sunscreen takes some time to achieve a relatively even distribution.

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