I saw a thread on this site a month or so ago about SPF ingredients reacting badly with those in make up to cancel out any SPF coverage- but I am not sure on the thread...
I have a question though and hope someone can offer some advice:
I have an SPF moisturiser with Titanium (sp?) Oxide in it. I can't remember if I was able to use it with make up which has zinc in it as I think I read this could cancel out the protection. Also, are there any other ingredients that clash with ingredients in sun care products??

I have a question though and hope someone can offer some advice:
I have an SPF moisturiser with Titanium (sp?) Oxide in it. I can't remember if I was able to use it with make up which has zinc in it as I think I read this could cancel out the protection. Also, are there any other ingredients that clash with ingredients in sun care products??