CHICAGO (Reuters) - An abnormality in two genes can make a common class of chemotherapy drugs used to fight breast cancer less effective, U.S. researchers said on Sunday in a finding that could help doctors better tailor treatments.

WASHINGTON (Reuters) - Fake versions of GlaxoSmithKline’s over-the-counter diet pill were contaminated with dangerously high levels of a prescription weight loss ingredient, U.S. officials warned on Saturday.

NEW YORK (Reuters Health) - Women who smoke marijuana during pregnancy may impair their baby’s growth and development in the womb, a new study suggests.

NEW YORK (Reuters Health) - Depression is a major health issue for breast cancer survivors, but new research hints that regular exercise and drinking green tea may help.

WASHINGTON (Reuters) - General Electric Co’s healthcare unit made misleading claims about an imaging drug on a company website, U.S. health officials said in a letter released on Friday.

NEW YORK (Reuters Health) - Drugs used to treat malaria may be useful for patients with lupus, a chronic debilitating “autoimmune” disease, according to according to a new report.

NEW YORK (Reuters Health) - A simple training program requiring no special equipment and little extra time can sharply reduce knee injuries in soccer-playing teen girls, Swedish researchers report.

BOSTON (Reuters) - Shaving 3 grams off the daily salt intake of Americans could prevent up to 66,000 strokes, 99,000 heart attacks and 92,000 deaths in the United States, while saving billion in health costs per year, researchers reported on Wednesday.

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CHICAGO (Reuters) - Newer digital mammograms may deliver significantly lower radiation doses than conventional film mammograms, especially for women with larger and denser breasts, U.S. researchers said on Thursday.