Dr. Ben Carson is denying a relationship with a controversial nutritional-supplement company called Mannatech. CNNs Drew Griffin reports.







Carson's ties to health-supplement company [fWFbWjyE8sJ]

Carson's ties to health-supplement company [fWFbWjyE8sJ]

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Dr. Ben Carson is denying a relationship with a controversial nutritional-supplement company called Mannatech. CNN's Drew Griffin reports.

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