DeForest Clinton Jarvis (March 15, 1881 – August 18, 1966) was an American physician from Vermont. He is best known for his writings on the subject of folk medicine. He recommended a mixture of raw apple cider vinegar and honey that has variously been called switchel or honegar, as a health tonic. He promoted the use of vinegar to keep the acidity of the body more acidic than alkaline, which he believed treated medical problems like burns and varicose veins. Source: Wikipedia (en)