A study finds that pedometers can put some spring in the steps of couch potatoes. They can also help lower blood pressure.While loosening your belt after Thanksgiving dinner, you may want to clip a pedometer to it. The reason: Just wearing a step counter leads to weight loss and lower blood pressure, according to research released Tuesday.

  Scientists reprogram human cells to behave like embryonic stem cells, a breakthrough that could eliminate ethical concerns.Researchers from Japan and Wisconsin reported Tuesday that they had reprogrammed mature human cells to behave almost exactly like embryonic stem cells, a biological breakthrough that instantly recasts the field's ethical, scientific and economic landscape.

  State says it is investigating an incident involving twins at Cedars-Sinai, purportedly involving a medication overdose.The California Department of Public Health said Tuesday it was investigating an incident involving newborn twins at Cedars-Sinai Medical Center in Los Angeles, reportedly an accidental medication overdose involving the children of actor Dennis Quaid.

  Shows turn the doctors into influential stars, but their medical ratings may get second billing.Good doctors used to be identified by fairly standard measures: where they trained, whether they were board-certified and if they were in good standing with the state medical board.

  Giuliani, McCain and Thompson are offering plans to help the uninsured -- but their aversion to regulations would mean that many of their fellow cancer survivors would be left out.When Rudolph W. Giuliani was diagnosed with prostate cancer in the spring of 2000, one thing he did not have to worry about was a lack of medical insurance.

  The plastic surgeon who operated on the mother of rap star Kanye West says she likely died of a heart attack, embolism or accidental overdose.The mother of rap star Kanye West, who died earlier this month after undergoing routine plastic surgery, likely succumbed to a heart attack, pulmonary embolism or accidental overdose of drugs prescribed to her for pain after the procedure, her surgeon said in an interview Monday.

  Better sampling shows that for years, data were inflated and reveals that the disease's growth has slowed for the first time.The United Nations on Monday radically lowered years of estimates of the number of people worldwide infected by the AIDS virus, revealing that the growth of the AIDS pandemic is waning for the first time since HIV was discovered 26 years ago.

  The U.S. Department of Agriculture has told Tyson Foods Inc. to stop labeling chicken as "raised without antibiotics" after the agency said it made a mistake in approving that term.

  A high school freshman who collapsed during a 3-mile cross-country race in September died from an inflammation of the heart, the Orange County coroner's office said Monday.

  The company alleges that its prostaglandin is being used in products that stimulate the growth of eyelashes.Allergan Inc., the maker of the glaucoma treatment Lumigan, sued seven companies it said were improperly selling related products as ways to grow eyelashes.