Zinc (Serum/Plasma)
Zinc is an essential mineral measured in your serum or plasma. It supports immune function, wound healing, taste and smell, and the activity of many enzymes.
Zinc is involved in immune defense, growth, and countless enzyme reactions, so adequate levels matter for healing and everyday function. Serum zinc is the common test, though it can be influenced by recent meals, inflammation, and time of day. Levels can shift with diet, gut conditions, and certain medications.
A high zinc level often reflects supplementation. Sustained high zinc intake can interfere with copper absorption and, over time, lead to copper deficiency, so a high result is worth reviewing if you take supplements. It can also affect immune function at very high doses.
A low zinc level suggests inadequate intake or increased losses and can affect immunity, healing, and taste over time. It is more common with limited animal-protein intake or gut conditions.
Labs provide a reference range, and results are best interpreted with attention to inflammation and recent food intake. A clinician can help you understand your value and any supplement balance with copper.
Sources
Educational context only, not medical advice or a diagnosis. Reference ranges vary by lab, age and sex; always discuss your results with a clinician.