A homeopathic medicine is obtained from a precise and controlled process of successive homeopathic dilutions. Boiron manufactures their medicines according to the highest standards, complying with U.S. FDA regulations and the Homeopathic Pharmacopoeia of the United States (HPUS). Boiron creates remedies using different dilutions (ex. C, CK, CH). If a certain dilution method is important to you, please call Customer Service for what we currently have: 1-800-252-0275