A chemical compound in wine reduces levels of a harmful molecule linked to Alzheimer's disease. In a recent study, resveratrol--one of several antioxidants found in wine--helped human cells break down the molecule, which contributes to the lesions found in the brains of Alzheimer's patients. Fortunately for teetotalers, the compound is also found elsewhere. Resveratrol is a natural polyphenol occurring in abundance in several plants, including grapes, berries and peanuts.