Zinc- Plasma NaF, in Visit Clinic

A plasma zinc test measures the concentration of zinc in blood to assess zinc status. It’s used to detect zinc deficiency or excess, monitor supplementation or chelation therapy, and evaluate causes of poor growth, impaired wound healing, recurrent infections, or suspected malabsorption. Results must be interpreted with clinical context because illness, fasting, and inflammation can alter plasma zinc levels.

Yes. A zinc blood test is usually done on an early-morning, fasting sample (commonly 8–12 hours) because recent meals and supplements can raise serum zinc and there is diurnal variation. Avoid zinc supplements for at least 24 hours, heavy exercise and alcohol before the draw, and topical zinc-containing creams; labs use trace-element–free tubes to prevent contamination.

Low plasma zinc suggests zinc deficiency or redistribution (often from inadequate intake, poor absorption, chronic illness, inflammation, or increased needs). It can cause impaired immunity, delayed wound healing, hair loss, taste changes, skin rashes and growth problems. Plasma zinc levels can be affected by time of day, fasting and inflammation, so abnormal results require clinical correlation and further evaluation before starting supplementation.

A good plasma (serum) zinc level in adults is generally about 70–120 µg/dL (10.7–18.3 µmol/L). Values below this range may indicate deficiency; higher values may suggest excess. Results can be affected by fasting status, time of day, recent meals and inflammation, and lab reference ranges vary. Discuss abnormal results with a healthcare professional for proper interpretation and management.

Yes. Physical and emotional stress can lower circulating zinc by increasing urinary loss, shifting zinc into tissues during inflammation, and raising physiological demand. Chronic stress may deplete zinc stores and impair immunity, healing, and mood. Eat zinc-rich foods, watch for symptoms, and consult a healthcare professional for testing or supplementation rather than self-prescribing.

Zinc deficiency can cause weakened immunity with frequent infections, slow wound healing, hair loss, loss of appetite and weight loss, and altered taste or smell. Other signs include skin rashes or dermatitis, persistent diarrhea, delayed growth and sexual development in children, impaired cognition or mood changes, and eye problems. Severe deficiency may also cause reproductive issues.