The active ingredient Red Bone Marrow, is found in our Purifying Exfoliant Masque. This product is a more potent skin immune cell stimulant than any other. All of the other products that contain ingredients which are supposedly powerful immune enhancers, e.g. Beta Glucan, Thymus etc., even though they have wonderful effects on the immune system, they do not nourish it. Red bone marrow is the only key ingredient in the world that directly nourishes the network of Langerhan Cells in the skin.