Got the sniffles? The largest study of the popular herbal remedy echinacea finds it won't help you get better any sooner.

U.S. health authorities intensified pressure on makers of dietary supplements, warning individuals or companies marketing "tainted" products that they could face criminal prosecution, among other consequences

Studies suggesting vitamin D, known for its crucial role in building bone, plays a role in preventing a host of ailments such as cancers, heart disease, stroke and even diabetes, are coming fast and furious. There are also indications it may help boost immune function.

Not every illness requires a trip to the doctor or drugstore, and some ailments can be prevented altogether.

People with a genetic predisposition to basal cell carcinoma, the most common form of skin cancer, may trade one health risk for another, a study suggests.

Despite reducing levels of a protein associated with heart disease, supplements containing the B vitamin folic acid don't reduce the risk for cardiovascular disease, death or cancer, according to a new large-scale analysis of studies on the issue.

The Food and Drug Administration warned eight companies on Thursday to stop marketing miracle cures that claim to treat everything from autism to Parkinson's disease by flushing toxic metals from the body.

American pharmaceutical company says it doesn't know whether an indigenous South African plant has been approved by U.S. regulators or how soon it may be available to consumers. It's said to reduce stress, relieve hunger, sedate and elevate moods when chewed.

Two popular supplements used to treat joint pain don't work and health authorities should stop paying for them, a new study says.

A new study out this week suggests a dietary supplement from a Chinese plant may create changes on the ends of our chromosomes that help keep DNA intact, possibly boosting the immune system.

Tai chi, an ancient Chinese practice of exercise and meditation, may relieve symptoms of the painful condition fibromyalgia, a small study finds.