C-Serum, short for cytoserum, is a highly concentrated seaweed extract rich in vitamins, minerals amino acids and trace elements. Helps to prevent dehydration, fine lines and to return moisture to restore overall skin vitality. IngredientsWater/Aqua/Eau, Algae (Seaweed Cytoserum), Glycerin, Chondrus Crispus (Carrageenan),Phenoxyethanol, Sodium Dihydroxyacetate, Potassium SorbateDirectionsUse all over face, neck & decolletage twice daily alone or under Hydro-Complex PFS moisturizing cream. Expiration04/02/2019