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Are you sticking to your diet? Scientists may be able to tell from a blood sample: Blood metabolites differed strongly between treatment and control groups in clinical trial of popular DASH diet


An analysis of small molecules called "metabolites" in a blood sample may be used to determine whether a person is following a prescribed diet, scientists at Johns Hopkins Bloomberg School of Public Health have shown.Clinical trials of diets and their health impacts are often plagued by participants' poor adherence to assigned diets, which can make it difficult or even impossible to detect the true effects of those diets. The new approach, described in a paper in the American Journal of Clinical Nutrition published on June 18, could provide an objective and relatively easy-to-obtain measure of dietary adherence, potentially greatly reducing the uncertainty of dietary intake estimates.

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