Zinc is used by some people to help with the common cold or lung infections, malaria, or asthma. Learn more about Zinc uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Zinc. Available in capsule, tablet, and lozenge form, there are plenty of options to get your daily dose of zinc — regardless of the type you choose. 1) Zinc and regulating immune function. Tablet, extended release (zinc gluconate).