People's Pharmacy

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Sugarless Gums Can Cause Digestive Woes

Posting Date: 06/20/2005

Q. What is the latest research on the benefits of blueberries? I saw a doctor on Larry King Live discussing his book on this topic, but unfortunately I fell asleep.

A. Blueberries have more antioxidant activity than most other fruits and vegetables. Animal studies have shown that these compounds appear to improve learning and memory in aging lab animals. Muscle strength and coordination also benefit. No one knows, though, whether blueberries will turn out to be as helpful for humans.

Q. You recently mentioned black cohosh for treating hot flashes in menopausal women but left out some important warnings. Black cohosh can be associated with liver toxicity and therefore should not be used for more than six months. Any symptoms of liver failure should be reported to a physician immediately.

In animal studies, black cohosh has caused more aggressive tumors. Women with a history of breast cancer should avoid using black cohosh.

A. Thank you for pointing out that there have been several cases of liver toxicity reported with black cohosh. Scientists have not yet determined whether black cohosh poses a cancer risk. A study in the International Journal of Oncology (Nov. 2003) suggests that this herb does not have estrogenic activity. Theoretically, this should make it safer than hormone replacement therapy, but it may interact with chemotherapy agents.

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In their column, Joe and Teresa Graedon answer letters from readers. Write to them in care of this newspaper or e-mail them via their Web site: www.PeoplesPharmacy.org. Their newest book is The People's Pharmacy Guide to Home and Herbal Remedies (St. Martin's Press).