William Horlick was a British-born American businessman and inventor, best known for co-founding the Horlicks company in the late 19th century. He developed a malted milk powder that became popular as a nutritional supplement and infant food. His product was marketed as a health food, gaining widespread acclaim in both the United States and the United Kingdom. Horlick's innovation contributed to the growing interest in dietary supplements during that era. The success of Horlicks led to its use in various applications, including as a food for soldiers during World War I. Today, malted milk remains a popular ingredient in various food products.