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 Though often touted as a way to strengthen bones, taking vitamin K for osteopenia does not protect postmenopausal women from age-related declines in bone density, a new study shows.

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 Raghuveer wanted to see if early signs of damage could be documented. She and colleagues used painless ultrasound tests to measure the thickness of the wall of a major neck artery in 70 children, ages 10 to 16. Almost all had abnormal cholesterol and many were obese.

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 A review of 600 cancer patients who died within 30 days of treatment found that in more than a quarter of cases it actually hastened or caused death.

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New research indicates that overweight patients with operable breast cancer are less likely than their normal-weight peers to achieve a complete response with chemotherapy.

Prior research has linked obesity with worse breast cancer outcomes, but the mechanisms involved were unclear, note Dr. Abenaa M. Brewster and colleagues from the University of Texas M. D. Anderson Cancer Center in Houston.

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