Level three in the Herbal Face Food Serum Series. Same ingredients as Serum II, but twice the formulation strength. Serum III is the most powerful serum in the series and is generally not for beginners. Serum III has the most intense warming sensation (Thermo-phytochemical Activation) and aromatherapeutic profile. Delivers the most comprehensive results in the shortest amount of time. Each level has a higher concentration of plants, intensity and healing power. Start with level one and power your way up.