Nanoformulated Progesterone+ Topical Replenishing Serum – 8 mg Bioidentical Progesterone – External Use Progesterone Serum for Women (1oz / 30ml) Progesterone+ Topical Replenishing Serum is our nanoemulsified, topical serum providing 8 mg of bioidentical progesterone per 2 pump dose. Our progesterone is derived from plant sterol diosgenin, a natural compound used to synthesize bioidentical progesterone.Progesterone+ is delivered using proprietary lipid nanoemulsion technology for enhanced absorption of ingredients.*