Common Resveratrol Side Effects
Some substances in red wine are thought to be heart healthy ingredients. Resveratrol, with its antioxidant properties, is one of them. Researchers are currently looking into both the benefits and side effects of resveratrol in red wine and nutritional supplements. Resveratrol is a chemical compound that occurs in red grapes and other natural sources, such as blueberries, cranberries and even dark chocolate. As a dietary supplement, it offers many health benefits. For example, heart-healthy resveratrol increases “good” blood cholesterol, prevents artery damage and clotting, improves circulation and more. Red wine antioxidants also serve as anti-cancer agents. Some studies suggest that resveratrol may also benefit Alzheimer’s patients. Like many supplements on the market, however, resveratrol can produce some unwanted side effects. Fortunately, the negative effects are minimal. Resveratrol and Diarrhea Diarrhea is a resveratrol side effect that concerns some people. Those who experience it usually take supplements derived from Japanese knotweed rather than grapes. Manufacturers often use knotweed, a bamboo-like plant, for bulk production of supplements. While knotweed is a good source for resveratrol, it also contains an alkaloid with laxative properties that induce diarrhea. People can avoid this by choosing dietary supplements derived from grapes instead of knotweed. The product label should list the supplement’s ingredients. Alternatively, red wine is a natural resveratrol source that is less likely to cause diarrhea. Resveratrol and the Blood Resveratrol is a natural blood thinner. This is not a bad resveratrol side effect, unless the supplement is taken in very high doses. People who take prescription blood thinners, or those who are about to undergo surgery, should avoid taking resveratrol and other anticoagulant substances. Resveratrol and Headaches The valuable properties of resveratrol -- antioxidant, anti-cancer, antiviral, anti-aging -- make it a “miracle” substance of sorts. However, the supplement can trigger headaches for people who get migraines. This is an unfortunate resveratrol side effect. For some people, a glass of red wine can easily cause a headache. Dietary supplements, with their much higher concentration of resveratrol, will almost certainly do so. Headache-prone people should do a controlled test and track the results before committing to resveratrol supplementation. Special Precautions Given the lack of substantial evidence regarding their safety and integrity, resveratrol is not recommended for some people. Women should not take the supplement if they are pregnant or nursing. Additionally, resveratrol is not recommended for children under 18 years of age. As with all dietary supplements, resveratrol should not be taken without doctor approval. People with hormone-sensitive health conditions may experience negative reactions. Resveratrol may also interact with antidepressants, cancer drugs and other prescription medications.