Clove is a very popular herb for helping eradicate various parasites. It forms a close partnership with black walnut and wormwood in doing this job. Cloves are often used to flavor foods. However, they are also thought to have some medicinal purposes.

For instance, cloves have been used as pain relievers, digestive aids and warming stimulants

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http://en.wikipedia.org/wiki/Clove#Medicinal_and_nostrums