DIY Natural Mascara November 12, 2015 by DIY Natural Mascara Print recipe Ingredients 1 tablespoon activated charcoal powder 2 teaspoons unscented liquid castile soap 6 - 7 drops vitamin E oil (optional) Directions 1. Thoroughly combine all ingredients. The vitamin E oil is optional, but does act as a preservative. 2. Using a syringe, fill a clean, empty mascara tube. (With a new mascara brush, the coverage may seem very light at first, but as the brush fills, it's just perfect).