What does spf15 lip balm mean? How long can spf15 protect against the sun?

Lip balm is the most direct and effective way to protect the lip skin from dryness. I found that most lipsticks now have spf15, so what does spf15 lip balm mean?

What does spf15 lip balm mean

Lip balm spf15 refers to a lip balm with a sun protection factor of 15. SPF is the abbreviation of sun protection factor, which indicates the sun protection effect of sunscreen products. The higher the SPF, the stronger the sun protection. 15 is the basic SPF.

Benefits of sun protection for lips

In fact, lips also need sun protection. Many people have dark lips, which is related to genetics, physical factors, and daily bad habits, but it is also closely related to not paying attention to sun protection. Lip sunscreen can prevent the lip color from further darkening; prevent the lip lines from deepening; and delay lip aging and reduce dryness and cracking.

How long does spf15 protect against the sun?

SPF15 can provide sun protection for 225 minutes (4 to 5 hours), and SPF1 can block ultraviolet rays within 15 minutes. If you want to calculate the specific sun protection time, just multiply the SPF value by 15. This is very suitable for daily use or people who often go indoors.

Is the higher the SPF factor, the better?

Although sunscreens with high SPF factors are more effective, it does not mean they are good. The higher the SPF factor of the sunscreen, the more chemical sunscreens it contains, which will cause certain irritation to the skin and easily cause skin damage.

The SPF of sunscreen should be selected according to the applicable occasion. For example, 15x sunscreen is suitable for people who commute to get off work or mainly engage in indoor activities. For other occasions, such as outdoor activities, it is better to choose a higher-factor sunscreen.