Is the higher the SPF of sunscreen, the better? What is the appropriate SPF of sunscreen?

Sunscreen is actually useful. We all know that sunscreen has an index. Is it true that the higher the index, the better? What is the appropriate SPF level for sunscreen?

Is the higher the SPF of sunscreen, the better?

The sun protection factor refers to the SPF value of the sunscreen, that is, the level of sun protection performance that the sunscreen can provide. From a safety perspective, the higher the SPF, the better. Because sunscreen products must reach a high SPF index, they must contain relatively large amounts of sunscreens, oils, and film-forming agents. These ingredients will cause varying degrees of impact when covered on the skin surface, so sunscreen should have a moderate SPF and should be reapplied regularly.

What is the appropriate SPF for sunscreen?

The choice of sunscreen index depends on the environment. Each person's environmental conditions are different, so the sunscreen multiples chosen are also different. Generally, when you are indoors and there is no strong sunlight and ultraviolet rays, you can choose an ordinary sunblock. The multiple of isolation cream is generally between SPF15-20, and it is mainly used to isolate the ultraviolet rays reflected by windows and floors and generated by computers. If you need to be outdoors for a long time in autumn, winter and spring, you can choose a sun protection factor of around SPF25~30. But in the hot summer, we need to be outdoors for a long time, and when we are at the beach or in places with strong ultraviolet rays, we should choose a long-lasting sunscreen with a high SPF factor of about SPF50.

Does sunscreen with a higher SPF value mean it is more oily?

The higher the sunscreen index, the greasier your skin will be after use. These oily ingredients are the best skin protection film when it comes to resisting ultraviolet rays, so the higher the sunscreen index, the oilier it will be. When we use sunscreen, we must pay attention to people with oily skin and try to choose a sunscreen that is not too high. We also need to choose according to our own environmental conditions. The right sunscreen is the best.

Is it necessary to apply sunscreen in advance?

If you need to go out for outdoor activities, you must apply sunscreen 15 minutes in advance before going out, because sunscreen does not have a sun protection effect as soon as it is applied. After the sunscreen is applied to the skin, it needs a certain amount of time to absorb the sunscreen ingredients in the sunscreen so that it can be deposited in the basal layer of the skin to form a protective film, so as to effectively block the absorption of light by melanocytes.