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LAKEWOOD, CO - OCTOBER 29:  Republican presidential candidate Ben Carson speaks during a news conference before a campaign event at Colorado Christian University on October 29, 2015 in Lakewood, Colorado. Ben Carson was back on the campaign trail a day after the third republican debate held at the University of Colorado Boulder.  (Photo by Justin Sullivan/Getty Images)
LAKEWOOD, CO - OCTOBER 29:  Republican presidential candidate Ben Carson speaks during a news conference before a campaign event at Colorado Christian University on October 29, 2015 in Lakewood, Colorado. Ben Carson was back on the campaign trail a day after the third republican debate held at the University of Colorado Boulder.  (Photo by Justin Sullivan/Getty Images)

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Ben Carson: I use supplement, but don't endorse it

Ben Carson talks about his connection to a health supplement he uses, but says he doesn't endorse it. CNN's Drew Griffin reports.

Ben Carson: I use supplement, but don't endorse it

Ben Carson talks about his connection to a health supplement he uses, but says he doesn't endorse it. CNN's Drew Griffin reports.