A cure for marijuana abuse could be on the horizon thanks to a new finding. Researchers found that increasing the levels of a naturally-occurring acid in the brain could stop addicts who are trying to give up from relapsing. The scientists discovered that kynurenic acid reduces the kick monkeys and rats get from THC, the active ingredient in marijuana. … Kynurenic acid, which can be produced from bananas and turkey, is thought to cause fewer side effects than other treatments that have been considered because it occurs naturally in the brain. …