What is the recommended maximum daily zinc supplementation to avoid copper deficiency when treating pressure ulcers?

• A. 40 mg
• B. 100 mg
• C. 10 mg
• D. 1 mg

Answer: (A)

Zinc helps wound healing by supporting collagen formation, epithelialization, and immune function, but too much zinc can interfere with copper absorption. The body’s response to excess zinc involves increasing intestinal metallothionein, which binds copper and limits its uptake, potentially leading to copper deficiency with long-term high-dose zinc use. To balance healing benefits with safety, the daily amount kept within the established safe ceiling is about 40 mg of elemental zinc. Doses around this level avoid pushing copper absorption down, whereas much higher amounts (like 100 mg) raise the risk of copper deficiency, and far lower amounts (such as 10 mg or 1 mg) may not provide enough zinc to support healing in more severe ulcers. So the recommended maximum daily zinc supplementation to avoid copper deficiency when treating pressure ulcers is 40 mg per day. If high-dose zinc is used, monitor copper status and consider copper supplementation if needed.