Does SPF 50 last longer than 30?
Does SPF 50 last longer than 30? In theory, an SPF 50 sunscreen would allow users to stay out in the sun fifty times longer than they normally could without sunscreen, while SPF 30 would imply that users can stay out thirty times longer before getting sunburned.
Is SPF 50 overkill?
Properly applied SPF 50 sunscreen blocks 98 percent of UVB rays; SPF 100 blocks 99 percent. When used correctly, sunscreen with SPF values between 30 and 50 offers adequate sunburn protection, even for people most sensitive to sunburn.
What happens if you mix SPF 30 and 50?
But suffice it to say that if you mix sunscreen, the maximum SPF you'll get is the higher of the two you started with, she said. And you'll likely end up diluting it instead. In fact, if the two sunscreens use different active ingredients to protect you from the sun, they could end up compromising one another.