If you are using an SPF 30, you would probably want to re-apply it in 2 hours. On the other hand, SPF 50 would probably be still effective on your skin for up to 4 hours. (Please note that these estimates depend on your skin type. We will get there!)
But isn’t SPF 50 also stronger than SPF 30?
Yes, it is. If SPF 30 blocks 97% of UVB, SPF 50 blocks 98%. So, the difference is not that high, but the effective period is longer.
Well, that was easy, right? But wait. There’s more!
Not every sunscreen is the same. There are 2 main types of sunscreens; which are physical and chemical.
As we know, you can categorise your skin type as normal, dry, oily, combination skin. When it comes to SPF, we need to look at your skin more in-depth. Such as; acne-prone, mature, or ageing skin. And then you can choose the right SPF for your skin type.
If you don’t know your skin type, you can find it
SPF for normal skin
For those who are lucky enough to have normal skin, every SPF would be suitable to use.
All you need to decide is the strength of your SPF. Depending on the weather, if you are not going to spend much time outside, you can choose 15 SPF. But if you are planning to do some gardening under the sun, you can go up to 100 SPF!