I heard it was the Zinc that made it work. But, they are using the combination of all three now here locally, and they say they are getting good results.
But there is no evidence of exogenous Zinc changing either the interstitial concentration of Zinc, the extracellular concentration of Zinc, of the intracellular concentration of Zinc. In fact it is improbable that anyone in the US could alter these values by taking exogenous Zinc in the absence of a Zinc Deficiency which is really unheard of in the US.