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My makeup, Neutrogena Healthy Skin Makeup, contains an SPF of 20. Do you think that's enough to prevent sun damage/darkening? For me, using sunscreen, like Coppertone, generally irritates my skin and makes it look greasy. Furthermore, I don't go out in the sun much anyways.
 

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SPF of 30 can be added under your makeup. This will protect you for about 2 hours. Now this does not mean 2 hours IN the sun , but 2 hours of time. Apply it at 7am, it will not be effective at noon when you take a walk. Two ingredients are a must. Titanium
oxide (i believe) and parasol. Those really high numbers just give about 5% more coverage. Even if you stay in the house, the light at the windows and ******* window will age us.
 

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That's true, Suzy. Titanium dioxide (and zinc oxide) are nice broad spectrum sunscreens. Devita 30 is a great one.

Another option if you don't like those are the chemical sunscreens, but you need to look for the ingredients "mexoryl" or "tinosorb" provide photostability. Otherwise the ingredients are broken down by the photons in the sun and no longer provide any protection (and then you have to re-apply every 2 hours or so). Please read this about sunscreens, since it explains it better than I can! :

Why Tinosorb M and Tinosorb S are Effective Sun Filters Article | Pharmacymix.com, Skin Care Pharmacy and Blog Specializing in Anthelios and Mexoryl Sunscreens

Parasol is avobenzone and is easily degraded by the sun unless protected by Tinosorb S/M.



 
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