
OK, so this morning I put on Clinique's City Block with an SPF of 25. On top of that, I used a foundation with an SPF of 15. Does this mean I now have SPF protection of 40? Or does it not work that way? |
From Paula Begoun's website (http://www.cosmeticscop.com/sun-care-essentials.aspx):
"If you are using more than one product that contains sunscreen, the two sunscreens do not add up to one SPF number. In other words, an SPF 8 and an SPF 15 do not add up to an SPF 23. Though you would get an increased SPF value for protection, there is no way of knowing what that increased protection would be. If you want to count on getting an SPF 30's worth of protection, then that is the number you should look for in one product." |
Thank you very much. |