Experts from Cleveland Clinic ask 17 men and women with an average age of 64, whose blood levels of vitamin D were insufficient to take their supplements with their largest meal of the day.
Two or three months down the line the study participants had about a 50% increase in blood levels of the vitamin regardless of the dose they took.
The researchers speculated that the increase was due to the vitamin being fat soluble which means better absorption.
Although vitamin D is not crucial for maintaining bone strength research has suggested it contributes to the reduction of system problems such as cancer and cardiovascular disease.
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