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[ling]

If my moisturizer is SPF 15 and my powder foundation is SPF 15, does that make SPF 30? Or is it still 15?

Comments

[dsmoen.livejournal.com]

It should be 30. Then again, there may be limits to an ingredient's efficacy that mean it's somewhere between 15 and 30.

I usually use 25 or 50 (the latter if I expect to spend a non-trivial amount of time in the sun).

[lingtm.livejournal.com]

I have a sunscreen that I use that's SPF 30 if I'm going to be out in the sun. Living in Florida, you basically HAVE TO always wear sunscreen. I worry that all the sunscreen is also too much chemical stuff on my face.