Sun products are particularly used during the summer and this is understandable. That said, we tend to confuse the SPF indices. We light up your lantern.
What is an SPF?
The Sun Protector Factor in short SPF, is an index which assesses the degree of protection of a sun product against UVB as a priority, but also against UVA accelerators of skin aging. There are 4 levels of SPF:
- Low, in the range 6-10.
- Medium, in the range 15-25.
- High, in the range 30-50.
- Very high, over 50.
The difference between SPF 15, 30 and 50
The main difference to note is the degree of UVB blocking which is expressed as a percentage. An SPF blocks around 92% UV, while an SPF 30 blocks 95% and finally, SPF 50 blocks 98% UV.
It is important to know that no cream in the world can block 100% UV. This is the reason why, whatever SPF you choose, you will need to apply it on a regular basis without leaving out the most sensitive parts of your body. For example, you can put it on every hour, taking care to avoid the 11 am-3pm time slot, because this is a period during which the sun’s rays are particularly aggressive for the skin.
Finally and contrary to what we read here and there, you can totally tan using an SPF 50 cream.