Biotherm Blue Therapy Serum In Oil Night. A revitalizing night serum with a non-greasy texture that transforms into an oil upon application has three natural aquatic extracts of Blue Micro-Algae, Golden Macro-Algae & Pure Thermal Plankton. Rich in omega 3 fatty acid with a lipid composition like skin. Repairs signs of aging while regenerates and strengthens skin. Ulkenia oil minimizes appearance of wrinkles so skin is smoother, more radiant & younger looking.