Sunscreen sun protection index how to choose

In the process of buying sunscreen, what does the SPF marked on the sunscreen bottle mean and how should we buy the right SPF sunscreen for our skin?

Sunscreen sun protection index SPF

Commercially available sunscreen cosmetics are generally marked with three letters of the alphabet and an Arabic numeral SPF. The so-called SPF (English: abbreviation of "Sun Protection Factor"), that is, the sun protection index. Such as SPF15 means 15 times the strength of sun protection, assuming that a person in the absence of sunscreen in the case of sun 15 minutes skin began to appear red spots, then after smearing the SPF15 sunscreen, can ensure that she in 15 minutes x 15 minutes before sunburn skin, where "15" is a multiple, a multiple of 15 minutes to 20 minutes minutes.

High index sunscreen is irritating to the skin

The sunscreen products currently on the market range from 6 times to 40 times the coefficient, the greater the multiplier, the longer the sunscreen time, the better the sunscreen effect; but the coefficient of high products often contain a large number of physical or chemical sunscreen agents, the stimulation of the skin is greater some, easy to block pores, and even breeding acne and pimples. Previously, the higher the coefficient of sunscreen cosmetics, the texture and feel of the more sticky, breathable, oily skin but to avoid it. Now well, although the coefficient of new sunscreen increasingly high, but most brands are well eliminated greasy defects, customers no longer have to worry about not breathable.

How to choose the right SPF

There are two types of sunscreens: UV absorbers and UV shielding agents (such as titanium dioxide and zinc oxide ultra-fine powder.) It is impossible to have a product with an SPF of 20 or more that does not contain titanium dioxide. Sunscreens absorb UV rays while there is a certain stimulating effect on the skin, and if there is an excess of UV absorbers, it will also become a burden on the skin, so choose what kind of sunscreen, depending on your workplace, time and the intensity of the sun to decide.

Choose sunscreen index by scene

If your job is indoors and you don't go out much, a sunscreen with SPF15~SPF20 is sufficient; If your job requires you to run around or travel on holidays, you can use products with SPF 20 or above; If you travel to the beach or tropical areas, then you should choose sunscreen products with SPF 30 or more.

Choose sunscreen index according to skin type

Specifically: general type of skin people, SPF value to 8 ~ 12 is appropriate; people sensitive to light, SPF value to 12 ~ 20 is appropriate; sensitive skin should pick plant-formulated sunscreen or sun oil containing titanium dioxide, you can also use products containing vitamin E and preservative-free, vitamin E anti-sun efficiency is quite high, its lubricant composition and purification effect, can neutralize the sun caused by It has a lubricating and purifying effect that neutralizes cell damage caused by the sun. When using skin care products with fruit acids, they should be combined with physical sunscreens with a high sun protection factor to prevent new skin from being damaged. This is because fruit acid skin care products can make the skin thinner, more fragile and less resistant to UV rays.

Choose sunscreen index by skin tone

In addition, the choice of sunscreen should also depend on skin tone. Fair-skinned people should preferably use sunscreens with an SPF of more than 30 to prevent spotting; dark-skinned people can use sunscreens with an SPF of 15 on weekdays.