He recommended a mixture of raw apple cider vinegar and honey that has variously been called switchel or honegar, as a health tonic.

[5][6] Jarvis's hobbies included making jewelry and playing the cello, and he managed a children's orchestra for 22 years.

One reviewer wrote, "Pliny, the ancient Roman originator of the doctrine of signatures, used honey and vinegar to cleanse the system and promote good health.

[citation needed] In 1960, copies of Jarvis' book Folk Medicine were seized by the Food and Drug Administration in connection with sales of "Honegar".

)[12]Jarvis promoted the idea that apple cider vinegar and honey could be used to cure arthritis, diabetes, high blood pressure, heart disease and many others.