Sun protection is divided into physical sun protection, chemical sun protection and biological sun protection;

Among them, the level of sunscreen index can reflect the ultraviolet protection ability of sunscreen products.

Sun protection method:

First, keep out the sun.

1, when the sun is strong, wear dark clothes instead of white. White clothes only reflect heat and can't block ultraviolet rays.

2, exposed to the hot sun, you can wear a wide-brimmed light-colored sun hat and an umbrella.

3. Wear sunscreen or sunscreen to protect your skin.

4. You can use sunscreen and the usage of sunscreen. Apply sunscreen products 10-20 minutes before going out. At least 1-2 ml at a time and a certain thickness can achieve the best sunscreen effect.

Second, weight loss and sun protection

Eat the following sunscreen foods;

1. Vitamin C fruit

Guava, kiwi, strawberry, cherry tomato, tomato or citrus are all acceptable. ? [5]?

2. Yellow and red fruits and vegetables

Red and yellow fruits and vegetables and dark green leafy vegetables, such as carrots, mangoes, tomatoes, papaya, water spinach, etc. They all contain a lot of carotene, which helps to resist oxidation and enhance skin resistance. ? [5]?

3. Bean products

Isoflavone in soybean is a phytoestrogen with antioxidant capacity.

Third, sun protection during travel.

1, apply sunscreen repeatedly.

Sweating or towel wiping will reduce the sunscreen effect. Repeated application is not to obtain new protection, but to maintain the sunscreen effect. Any skin care product, even water, will affect its sunscreen function as long as it is coated with sunscreen, so it is necessary to apply sunscreen after swimming or sweating.

2. Avoid going out at noon

In summer, every morning 10 to 2: 00 pm is the time when the intensity of solar ultraviolet radiation is the highest. Avoid or reduce going out.

Step 3 use sunscreen

The protection of sunscreen depends not only on the composition and coefficient of sunscreen, but also on the thickness and uniformity of wiping.

Extended data

Interpretation of sun protection index of sun protection products

The smaller the SPF value, the worse the sunscreen effect; The higher the SPF value, the better the sunscreen effect.

PA+stands for maintenance efficiency, and PA +++ stands for good maintenance efficiency.

PFA 2-4 has mild sun protection, and the effective sun protection time is 2-4 times, and the effect is so.

Baidu encyclopedia-sun protection