How many hours does spf50 last and how often should I reapply it?

spf50 represents the sun protection ability of the sunscreen. This is a must-see when buying sunscreen. So how many hours can this spf50 protect? How often should I reapply spf50?

How many hours can spf50 protect

A 50x sunscreen can provide protection for 50*10=500 minutes to 50*25=1250 minutes. If you don't stay in the sun for a long time, a 50x sunscreen can provide protection for 500 minutes. However, if you stay in the sun for a long time, the protection time will be greatly reduced, and it may be less than 250 minutes.

The sun protection effect of sunscreen is affected by many factors. Even if the sun protection factor is 50 times, the intensity of ultraviolet rays, skin quality, usage, sweating and other factors will affect the sun protection ability.

How often should I reapply spf50?

SPF50 sunscreen can be reapplied every 2 to 3 hours. If you are in a swimming pool or at the beach, you need to reapply it every time you come out of the water. Of course, this depends on whether your sunscreen is waterproof. If it is waterproof, you can reapply it every 1 to 2 hours.

This is all I have to say about SPF50 sunscreen. Remember to reapply it regularly, otherwise you will get tanned.

When is SPF 50 suitable for use?

Sunscreen with an SPF of 50 has very strong sun protection ability and is only suitable for use at seaside beaches and when traveling to tropical areas. It is not needed in daily life or ordinary travel because SPF 50 sunscreen contains a lot of sunscreen, which is corrosive. Too much sunscreen can easily penetrate the skin and cause allergies and other problems, so it is not suitable for frequent use.