What is the maximum daily zinc dosage stated, noting to stop when deficiency is resolved to prevent copper deficiency?

• A. up to 40ml/d
• B. up to 40mg/d
• C. up to 400mg/d
• D. up to 4ml/d

Answer: (A)

The key idea is dosing zinc when using a liquid preparation, where the daily amount is given as a volume (milliliters) rather than a straight milligram amount. The guidance specifies a maximum daily volume of zinc-containing liquid, because the actual zinc delivered depends on the product’s concentration per milliliter. Importantly, you should stop zinc supplementation when the deficiency is resolved to prevent copper deficiency, since excess zinc can interfere with copper absorption and metabolism.

Thus, the stated maximum is up to 40 milliliters per day. The other options refer to milligrams or much smaller volumes, which don’t match the given dosing format or the referenced maximum. If you know the product’s zinc concentration per milliliter, you can convert 40 mL to the corresponding mg of zinc, but the key point is the volume-based maximum and stopping when deficiency improves to avoid copper-related issues.