The Reverend Sylvester Graham (July 5, 1794 – September 11, 1851), a 19th-century Presbyterian minister, was an American dietary reformer, best known for his emphasis on vegetarianism, the temperance movement, and on eating whole-grain bread as a cure for alcoholism and sexual urges; he did not invent graham flour, graham bread, or graham crackers, but those products were inspired by his preaching.