Wilhelm Heinrich Schüßler — also spelled Schuessler, particularly in English-language publications — (21 August 1821 – 30 March 1898) was a German medical doctor in Oldenburg who searched for natural remedies and published the results of his experiments in a German homeopathic journal in March 1873, leading to a list of 12 so-called "biochemic cell salts" that remain popular in alternative medicine.
Although firmly within the homeopathy movement of his day, the modern definition of homeopathy tends to exclude his concept of homeopathic potency that, while very dilute, still retained small amounts of the original salt.