Resveratrol, found in berries, grapes, peanuts, and Japanese knotweed root, is a natural immune system protector. Red wine is the best source of resveratrol. However, skeptics warn of unknown dangers, and some supplements have over 100 times more resveratrol than natural food. Plants with resveratrol have possible side effects.
The foods with the highest amounts of resveratrol are berries and grapes. Resveratrol is particularly associated with the outer skin of these foods, and in nature, it is used to protect plants as part of their natural immune system. It can also be found in peanuts and Japanese knotweed root. Even peanut butter has a significant amount of resveratrol, but in general, plants with resveratrol are best eaten in their natural state. The one exception is red wine, which is considered the best way to get resveratrol from grapes.
Plants generally produce resveratrol around the area of their outer skins as a protective substance, and any food process that removes the skin can also remove the resveratrol. It can also be lost during any type of cooking procedure. The fermentation of red wine actually leads to the creation of more resveratrol because the skin remains on the grapes while it is fermenting, and they continue to produce resveratrol to protect themselves.
In general, many experts are excited about the potential benefits of resveratrol, and as a result, some have suggested that people eat foods with the highest sources of resveratrol they can find. These experts cite studies suggesting that resveratrol could reduce the chance of heart attack, slow the aging process, fight cancer, and even help with weight loss.
Many skeptics are wary of these studies because they have generally only involved animals. No clinical trials involving the effectiveness of resveratrol in humans have been completed. These skeptics suggest that any effectiveness of resveratrol in rats may be irrelevant, arguing that people can’t necessarily expect the same results. They also suggest that there may be unknown dangers involved in using resveratrol.
Even the foods with the highest resveratrol don’t actually contain that much. For this reason, some companies have produced formulas with the highest amounts of resveratrol that they can deliver. Some of these supplements have over 100 times more resveratrol than any natural food. Some critics argue that these amounts have the potential to be unsafe, while proponents suggest that rats in successful laboratory tests were given similar amounts of the substance.
Many of the plants that contain resveratrol have some possible side effects. For example, Japanese knotweed contains an acid that can potentially cause arthritic symptoms. Some experts also fear that resveratrol could thin the blood too much and could have bad interactions with other medications.
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