Zinc · high result
What does a high Zinc mean?
Short answer
High zinc is nearly always supplement-driven — zinc lozenges, immune formulas and high-dose tablets — and matters mainly because sustained excess (above about 40 mg/day) suppresses copper absorption, causing anemia, low neutrophils and, over time, nerve damage. Hemolyzed samples and some tube types also read falsely high.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
What is the normal range for Zinc?
- age 18+: 60.0 – 130 mcg/dL
Full reference table, citations and testing options: Zinc biomarker page.
What are the common causes of high Zinc?
- Zinc supplements and lozenges, 'immune' formulas, denture creams
- Occupational exposure (welding, galvanizing)
- Sample hemolysis or contaminated collection tubes (false high)
What symptoms go with high Zinc?
- Nausea, stomach upset, metallic taste
- Over time: fatigue, anemia and neurological symptoms from copper deficiency
What do clinicians usually check next?
- Stop supplements and retest
- Copper and ceruloplasmin, CBC if intake has been high for months
Follow-up tests available at TestWell: CBC with Differential ($21.99), CBC (Complete Blood Count) ($21.99), Copper ($31.99).
How do you recheck Zinc?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| Vitamin & Mineral Deficiency Panel | Panel · 9 tests | $189.99 | No | 3–5 business days |
| Men's Hair Health Panel | Panel · 19 tests | $499.99 | No | 4–7 business days |
| Women's Hair Health Panel | Panel · 19 tests | $469.99 | No | 4–7 business days |
| Zinc | Test | $26.99 | Yes | 3–6 business days |
Common questions
How much zinc is too much?
The adult upper limit is 40 mg/day. Many lozenge regimens exceed it during a cold — fine for a few days, a problem over months.
Sources
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.