Suggested use with: Medi-Clear Acne Serum™, Medi-Clear Lightening Gel™, Supernatural Vitamin A Crème™, Lemongrass Masque™, Oceana Mineral Gel™. Combine a small pinch of Medi-C™ with desired product and apply to face. Masque products should be removed after 10 minutes. All other products can be left to penetrate the skin.