Jason: How does zinc act as an antihistamine? By itself. DAO SOD Metallothioneins. ChatGPT4 at Bing: Zinc is a mineral that supports your immune system and metabolism. It plays a role in wound healing and is also important to your senses of smell and taste. Zinc depletion is linked to histamine-related itching, mast cells releasing … Continue reading Zinc (and Copper) as an Antihistamine