Assertion: zinc's presence | /r/CapableOf | prevent their release
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Source sentences:
text: Because the presence of mannitol and sorbitol in the formulation of zinc lozenges has been demonstrated to chelate zinc ions in saliva and prevent their release, a meta-analysis of 7 trials (N=575) sought to minimize heterogeneity and re-evaluate the effects of only the acetate and gluconate formulations of zinc lozenges on duration of the common cold.