How to check the sun protection index of sunscreen? What is the best index to use in summer?

Sunscreen is something that many people need to use, especially in summer. Without it, the whole person will become dark. How do you check the SPF of sunscreen? What sunscreen index is good for summer?

How to check the sun protection index of sunscreen

The ultraviolet rays in sunlight can be divided into four types according to their wavelengths, namely, UVA, UVB, UVC and UVD. The longer the wave rays, the greater the impact on human skin health. Generally speaking, the ultraviolet rays that human skin needs to be protected from are UVA and UVB. The sun protection index for protecting against UVA is expressed as PA or PPD, and the sun protection factor for protecting against UVB is expressed as SPF.

What sunscreen index is better in summer?

Although the weather is hot and the sun is strong in summer, when using sunscreen, sunscreen between SPF15 and SPF30 can meet daily needs. If you choose a sunscreen with a higher SPF in your daily life, it can easily cause greater irritation to your skin and cause problems such as acne and blackheads.

1. Sun protection in the office

If you stay indoors most of the time, SPF15 PA+ sunscreen is enough. Reapply every 4-5 hours.

2. Sun protection for outdoor sports

If you go out for exercise, you should use SPF25-30 PA++ sunscreen and reapply it every 3-4 hours.

3. Wear sunscreen when swimming

When swimming, it is best to choose a waterproof sunscreen with SPF30 PA+++ or above, and reapply it every 1-2 hours.