How to scientifically choose sunscreen cosmetics?

So how to scientifically choose sunscreen cosmetics? In fact, the human body should be comprehensive in protecting against UV rays. As long as the skin exposed on the outside of the clothes should be coated with sunscreen, including the neck, chin, ears, arms, calves, etc.; of course, the lips should be protected, if necessary, you can choose A sunscreen-based lipstick or lipstick to protect sensitive areas; in addition to wearing a hat and a parasol, you can also use a sunscreen shampoo or some hair care before going to the shampoo to prevent the hair from experiencing UV rays. After the infringement, the hair becomes brittle, bifurcated, dry, discolored and shedding.

It is necessary to determine the type of sunscreen cosmetics and sun protection index to be used according to the conditions, circumstances and circumstances of the occasion, season and time. In daily situations, a product with an SPF of 10-15 can achieve a good sunscreen effect. If it is exposed to the sun for a long time, especially for outdoor activities such as tourism, swimming, hiking, etc., you can choose a higher SPF value. Products, such as the choice of SPF value of 15-30 or SPF30 + products are more suitable, of course, it is more desirable to choose both UVB and UVA. At present, there is no clear regulation on the evaluation criteria of UVA in China, and it is still under study. Some sunscreen products on the market have been marked with the words UVB/UVA or the words SPF/PA+ (PA++, pA+++). Nowadays, SPF18/PA+++, SPF16/PA+++ have been marked on the cosmetics market. SPF15/PA+++, etc., generally speaking, it has both protection against UVB and UVA. Consumers can purchase sunscreens according to the instructions as needed. However, don't neglect other functions of cosmetics. Take sunscreen as one of the functions, and comprehensively weigh the comprehensive purchase of suitable cosmetics.

It is best to use sunscreen cosmetics evenly 30 minutes before going out and apply evenly to the parts you need to use. If you are outdoors for a long time, you need to apply it every 2-3 hours. Working in the office, rainy days (UV coverage rate is 21%-54% of sunny days), cloudy days (UV exposure rate and 81%-95% of sunny days), under general umbrellas (and 50% of UV energy) Penetration) also requires the use of sunscreen cosmetics, but the SPF value should not be chosen too high. Pay attention to the choice of sunscreen cosmetics. The higher the SPF value, the better. The choice should be appropriate. Cosmetics that use too high a sunscreen index can affect the function of skin pores and other functions, and increase the burden on the skin. When the skin is sunburned, do not use it again. Use sunscreen cosmetics after recovery.

From the analysis of the development of international cosmetics, the addition of sunscreen to cosmetics, regardless of the amount of addition, is a development trend, it can not underestimate the efficacy of cosmetics, and currently some cosmetics to improve and improve product quality Add a small amount of sunscreen under the conditions permitted by the regulations, but do not mark it. Pay attention to the sunscreen to be perennial, and keep the skin careless, so that the skin is not black, the sun is not hurt, the sun is not old, and the whiteness is healthy and radiant, which is the pursuit of the cosmetics industry.