Which mineral can Zinc affect and should therefore be limited to 40mg per day?

Zinc is a vital mineral that plays numerous roles in the body, including immune function, enzyme activity, and protein synthesis. However, excessive intake of zinc can lead to negative consequences, particularly in relation to copper metabolism. High levels of zinc can interfere with the absorption of copper in the intestines, potentially leading to copper deficiency.

This interaction is significant as copper is crucial for several physiological processes, including iron metabolism and the functioning of enzymes important for energy production and antioxidant defense. The established upper limit for zinc intake is set at 40 mg per day for adults to mitigate the risk of such interactions and to prevent zinc-induced copper deficiency.

Recognizing the delicate balance between these two minerals is essential in gerontological nutrition, where the risk of deficiencies and interactions can be more pronounced due to age-related physiological changes and dietary considerations. Therefore, it is necessary to monitor zinc intake to ensure it remains at or below this upper limit to avoid compromising copper status in older adults.