Mineral Cell Salt Combination Q contains Iron Phosphate, Potassium Chloride, Potassium Sulphate, Sodium Chloride. Ferr. Phos., Kali Mur., Kali. Sulph., Nat. Mur. 12 tablets provide +8ug of Biotin (16% Reference Intake). Formulated strictly in accordance with Dr. Schuesslers principles and system.