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Low levels of vitamin D may raise a person's risk of premature death, a study by Johns Hopkins researchers shows. The research followed other recent studies showing low levels of vitamin D are linked to certain cancers, diabetes, and bone and immune system problems, but this is the first research to connect vitamin D deficiency to a higher risk of death

Being overweight or seriously underweight as a teenager curbs life expectancy as much as smoking 10 cigarettes a day, a study suggests.\nSwedish researchers followed 46,000 men from the age of 18 for 38 years.