Regardless of the SPF value, it takes 2 hours to refill it?
2 hours to apply a sunscreen product
Sun Yu Bao Jie, Senior Skin Care Specialist, Master of Dermatology, Senior Manager of Skin Care Products Marketing Department, Greater China:
It is recommended that the recoating every 2 hours is only a general rule, not absolutely.
The main reason why sunscreen products need to be replenished is not only because the sunscreen ingredients will fail, but also because sunscreen products will be lost due to many internal or external factors, such as sweating, clothing friction or swimming, water play, etc. The frequency depends on the situation and there is no absolute value. If the environment is hot and sweaty, and it is in outdoor activities, it may be reapplied in less than one hour; if it is in a cool indoor environment without sunlight, it can be replenished in 5 to 6 hours.
When the products with different sun protection factors are used together, can the sun protection effect be superimposed?
Use with different SPF products
Chen Ruijun L'Oreal Skin Care Laboratory Research Coordination:
The sunscreen effect cannot be superimposed, and the sunscreen with two SPF 15 superimposed is not equivalent to the protective ability of SPF30.
Do you need sunscreen only in the summer?
Sunscreen is only needed in summer
Li Bingjie Lan Lan (China) Chief Skin Care Specialist:
This is not the case. It is generally recommended to use PA++ or SPF30 or SPF50 sunscreen products throughout the year. SPF1 stands for 15 minutes against UVB, and UVB is stronger in spring and summer. It is the culprit for sunburn. SPF30 can fight UV rays for about 7 hours, and SPF50 can fight UV for about 12 hours. The PA value represents anti-UVA, one + indicates strong, two ++ indicates strong, and three +++ is strongest. UVA is the culprit for skin aging. It is recommended to use sunscreen all year round.
Does sunscreen clog your pores?
Sunscreen can clog pores
Chen Ruijun L'Oreal Skin Care Laboratory Research Coordination:
Whether the sunscreen clogs pores can be verified by some professional tests. Each product is different and it is difficult to generalize.
The higher the sun protection factor, the more greasy and thick the texture will be. The more clogged the pores are outdated. The current formula and technology have already advanced by leaps and bounds. Many high-power sunscreen products can also be light and comfortable.
Apply sunscreen to your face, how much is it enough each time?
Apply sunscreen on the face
Dr.YAPING E Member of the Medical Beauty Group of the Chinese Medical Association Dermatology Branch, Member of the Chinese Photobiology and Photochemistry Professional Committee, Senior Skin Care Scientist:
In general, if it is used for full face coverage, it is necessary to use about 1 ml (about 1 cent coin) of sunscreen at a time.
The amount of sunscreen needed to apply the entire body is about 30ml, which is 1/4 of a 120ml bottle of sunscreen.
Of course, the specific amount depends on the viscosity and comfort of the sunscreen product, but the amount of sunscreen products must not be too thin.
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