Dr. Enuf is a brand of soft drink bottled by Tri-City Beverage in Johnson City, Tennessee. It is a lemon-lime flavored drink (though its taste is different from common lemon-lime sodas such as Sprite or 7-up), and is fortified with several water-soluble vitamins. Its marketing slogan is "Enuf is Enough!"
Dr. Enuf's origins date back to 1949, when a Chicago businessman named William Mark Swartz was urged by coworkers to formulate a soft drink fortified with vitamins as an alternative to sugar sodas full of empty calories. He developed an "energy booster" drink containing B vitamins, caffeine and cane sugar. After placing a notice in a trade magazine seeking a bottler, he formed a partnership with Charles Gordon of Tri-Cities Beverage to produce and distribute the soda.
Read more about Dr. Enuf: Early Product Heritage With Mountain Dew, Where To Find Dr. Enuf