Cold-Clear (known as Cold-Eeze in the USA) has been subject to a number of clinical trials. These trials have demonstrated the effectiveness of the active ingredient in Cold-Clear for the symptoms and severity of the common cold.

Zinc Lozenge Study 1_Godfrey.pdf
Zinc Lozenge Study 2_Godfrey.pdf
Zinc Lozenge Study 3_Mossad.pdf

Use as directed. Always read the label. Consult your healthcare practitioner if symptoms persist.