Ok, no worries, beautione if your GA is 70% and you want to make 15%, you will add 2.3 ounces of GA to your base lotion. See how you do with the 15%...
What matters is Vit C can be harsh on your stomach if your not careful, so always go for the buffered version. This is the one I take and have taken...
You don't need a prescription to purchase Obagi with HQ, I get it no problem! Its not the HQ that needs the prescription, its the RA that goes along...
Natural Green Veins