The only benefit with mineral makeup I find is my forehead tends to be less shiny. I use liquid mineral makeup then put powder over that. Otherwise, it's just the same, if in some cases not worse, than non-mineral.
In the end, I think it's a lot of hype. If it wasn't for the fact that an hour after washing my forehead is shiny enough to signal airplanes at night I wouldn't bother with mineral makeup at all.
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