|Caffeine and Dark Chocolate|
Dark Chocolate is rich in antioxidants. If there is anything in this world that I promise will improve your skin, second only to sunscreen, is antioxidants. You can eat your antioxidants or you can put them right on your skin. Dark chocolate will make your skin appear more smooth, soften wrinkles, and neutralize the free radicals that cause sun damage. It can also improve circulation in skin when combined with caffeine. According to PubMed, caffeine does penetrate into the skin. According to the published peer reviewed article linked in PubMed, the diffusion rate for caffeine through human skin is 2.2 x 10-6 grams per centimeter squared of skin, per hour.
When you mix your masks, do not forget to add the chocolate and caffeine.