How many times sunscreen can you really understand?

We all know that the sunscreen products we usually use have an SPF or PA value. Do you know what this means? What is its maximum value? How to choose?

How many times sunscreen can be applied

The highest sunscreen factor is 50. Sunscreen refers to cosmetics that have added sunscreen agents that can block or absorb ultraviolet rays to prevent the skin from tanning and sunburn. Sunscreen products with different SPF or PA values ​​need to be selected according to the specific target to achieve the purpose of sun protection. Generally speaking, the higher the SPF index or PA value, the more protection it provides.

What does SPF mean?

SPF (Sun Protection Factor) is the sun protection effect value that prevents UVB damage and refers to the sun protection factor of sunscreen. The higher the SPF, the longer the sun protection time, but the greater the burden on the skin. For Asian skin types, daily sun protection only requires a sunscreen with an SPF value of 8-15, but when outdoors you must use a sunscreen of 15 or higher to ensure that your skin is not sunburned.

What does PA mean?

The main function of PA is to prevent the skin from being tanned or aged, and it is an indicator of the degree of protection against ultraviolet rays. The effect of PA is divided into three levels: PA+, PA++, and PA+++, which respectively mean effective, very effective, and extremely effective. The more plus signs there are, the better the defense effect. The SPF value refers to the skin's sun protection time, and PA refers to the ability to resist tanning.

How to choose sun protection factor

The higher the SPF factor, the greater the burden on the skin. It is important to choose the right SPF factor. For daily care, shopping, and window shopping, you can choose sunscreen products with SPF5-8; when going out for fun, you can choose sunscreen products with SPF10-15; when swimming or sunbathing, use waterproof sunscreen products with SPF20-30. The time of use should be appropriate. Sunscreen should not be used before putting on makeup, nor should it be applied just before going out.