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The Conversation

Jack Janetzki, Lecturer in Pharmacy and Pharmacology, Adelaide University

Should I take zinc or eat oysters to ward off colds, boost my immune system or improve fertility?

Supersizer/Getty Images

Judging by the claims on the bottles, it’s easy to assume a simple zinc tablet is a quick fix for everything from the common cold to low immunity and even male fertility.

But do they actually work? And should you be taking them?

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