FAQ: Q: When to take tart cherry? A: Abdominal discomfort Diarrhea Can affect weight Q: What are the benefits of tart cherry capsules? A: Source of Antioxidants. Tart cherries contain more plant-based antioxidants,called anthocyanins,than sweet cherries. … Melatonin Improves Sleep. Some types of tart cherries contain melatonin,which is also naturally produced by your body and … Read more