How many hours can a 50x sunscreen protect you? When is a 50x sunscreen suitable for use?

The SPF value in sunscreen products is the multiple of the time the skin can resist ultraviolet rays. The higher the SPF index, the longer the sun protection time. So, how many hours can 50x sunscreen provide protection?

How many hours can a 50x sunscreen protect you?

Generally, SPF50 (i.e. 50 times sunscreen) provides sun protection for 500 minutes. However, the higher the sunscreen product index, the more physical and chemical sunscreens it contains. The specific choice should be based on the specific environment and length of time. The premise of 500 minutes of sun protection is not to expose yourself to the sun for a long time. If you are exposed to the sun for a long time, the protection time of 50x sunscreen will be greatly shortened to less than 500 minutes, usually less than half the time, so you still need to reapply sunscreen during this period.

When is 50 times sunscreen suitable for application?

The 50x sunscreen has a longer protection time and better ability to protect against ultraviolet rays, making it suitable for people who go to the beach or sunbathe. But applying 50x sunscreen doesn't mean you can go the whole day without applying sunscreen. Generally speaking, if you stay outside for a long time, you need to reapply sunscreen every 2 hours or so. If you are indoors, you can reapply sunscreen every 3-4 hours.

Don't choose 50x sunscreen lightly

Although 50x sunscreen has good functions, it is generally not recommended to apply this type of sunscreen. First of all, there are very few sunscreens that can truly reach an SPF of 50 times. Most of them are only around 30 times. You need to do your homework when purchasing, otherwise don't buy this type of sunscreen easily. Secondly, 50x sunscreens mostly use chemical sunscreens, which contain some ingredients that can absorb ultraviolet rays. 50x means that it can absorb more ultraviolet rays and act on the skin surface, so this type of sunscreen is not recommended. Of course, if you go swimming or sunbathing at the beach, it is inevitable to apply this type of sunscreen. Or you can choose 30x sunscreen, just remember to reapply it frequently.

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.