The idea that fish-oil pills protect the heart has hit another snag now that a comprehensive review concludes that the supplement doesn't lower the risk of death, heart attack, or stroke among people at increased cardiovascular risk.

Long-term use of ginkgo biloba supplements doesn't prevent seniors with memory problems from progressing to Alzheimer's disease, according to a large, multi-center study in France published online this week in The Lancet Neurology.

Hidden drug ingredients that can cause serious and potentially fatal side effects have been found in Reumofan Plus and Reumofan Plus Premium, products marketed as "natural" dietary supplements for treating arthritis, muscle pain or other conditions, the Food and Drug Administration warned.

Calcium and vitamin D regimens widely recommended to prostate cancer patients who undergo hormone therapy are inadequate to prevent treatment-related bone loss--and may even increase the risk of heart disease and advanced prostate cancer. This according to a review article published online ahead of its publication in the September issue of The Oncologist, a peer-reviewed journal for cancer specialists.

Vitamin D is essential for bone growth and maintenance, and it might help reduce the risk of various diseases. But most people don't consume anywhere near the recommended daily allowance (RDA) of the vitamin from food sources, a problem that might be partially remedied by bumping up intake of vitamin D-fortified cereal and milk, according to a new study in the Journal of Food Science.

The Albanian weightlifter kicked out of the London Olympics on July 27 after he tested positive for steroid use told officials he had taken vitamins and dietary supplements and was unaware they contained stanozolol, a steroid on the list of prohibited substances.

Many dietary supplements, especially those that claim to enhance male sexual performance, are spiked with prescription drugs. That's one of the conclusions of our new report on 10 surprising dangers of vitamins and supplements.

Under threat of a lawsuit from the nonprofit Center for Science in the Public Interest, healthcare giant Pfizer has agreed to remove claims related to breast and colon health from some of its Centrum brand multivitamins, and to tone down certain other claims that the CSPI alleged are misleading.

Q. What is choline, and should I be taking a supplement of it?

Q. Are there any alternatives to Viagra that are sold over the counter?

If you have heart disease, a study out yesterday in the Archives of Internal Medicine might make you think twice about taking fish-oil pills to prevent a second heart attack. But the American Heart Association is sticking to its longstanding recommendations—and so are we.

About 10 percent of the U.S. population has nutritional deficiencies--mostly for vitamins B6, D, and iron--according to a report released Monday by the Centers for Disease Control and Prevention.

A diet lacking in an omega-3 fatty acid, predominantly found in fish, may cause the brain to age faster and lose some of its memory and thinking abilities, according to the results of a study released today by the journal Neurology.

There's insufficient evidence to support the use of Pycnogenol, a dietary supplement extracted from French pine bark, to treat certain chronic disorders, according to a review published Wednesday in The Cochrane Library.

The U.S. Food and Drug Administration and Rexall, Inc., of Deerfield Beach, Fla., have issued a recall alert for one lot of the company's calcium supplements. The bottles of Rexall Calcium 1200 mg plus 1000IU Vitamin D3 actually contain tablets of triple strength glucosamine chondroitin, which are derived from crustacean shells and may be harmful to consumers with shellfish allergies.