How is it promoted for use?
What does it involve?
What is the history behind it?
What is the evidence?
Are there any possible problems or complications?
Most such supplements have not been tested to find out if they interact with medicines, foods, or other herbs and supplements. Even though some reports of interactions and harmful effects may be published, full studies of interactions and effects are not often available. Because of these limitations, any information on ill effects and interactions below should be considered incomplete.
More information from your American Cancer Society