lozenge

zinc + vitamin c

Zinc and vitamin C act on complementary arms of the immune system: zinc supports T-cell, B-cell, and natural killer cell function and can interfere with rhinovirus replication in the throat, while vitamin C supports white blood cell function and maintains skin and mucosal barriers. Taken together, the pair may modestly shorten and ease common cold symptoms when started early, though the human evidence for the combination specifically is limited.