At one of the nation's top trauma hospitals, a nurse circles a patient's bed, humming and waving her arms as if shooing evil spirits. Another woman rubs a quartz bowl with a wand, making tunes that mix with the beeping monitors and hissing respirator keeping the man alive.

They are doing Reiki therapy, which claims to heal through invisible energy fields. The anesthesia chief, Dr. Richard Dutton, calls it "mystical mumbo jumbo." Still, he's a fan.

"It's self-hypnosis" that can help patients relax, he said. "If you tell yourself you have less pain, you actually do have less pain."

Alternative medicine has become mainstream. It is finding wider acceptance by doctors, insurers and hospitals like the shock trauma center at the University of Maryland Medical Center.

People turn to unconventional therapies and herbal remedies for everything from hot flashes and trouble sleeping to cancer and heart disease. They crave more "care" in their health care. They distrust drug companies and the government. They want natural, safer remedies.

But often, that is not what they get. Government actions and powerful interest groups have left consumers vulnerable to flawed products and misleading marketing.

Dietary supplements do not have to be proved safe or effective before they can be sold. Some contain natural things you might not want, such as lead and arsenic. Some interfere with other things you may be taking, such as birth control pills.

"Herbals are medicines," with good and bad effects, said Bruce Silverglade of the consumer group Center for Science in the Public Interest.