Understanding Cobalt: Normal vs Optimal Ranges
Also known as: cobalt, cobalt blood level, Co
?What is Cobalt?
Cobalt is a trace element essential in small amounts as a component of vitamin B12 (cobalamin). Elevated blood cobalt is toxic and most commonly seen in patients with metal-on-metal hip implants or occupational exposure.
!Why It Matters
Chronically elevated cobalt causes cardiomyopathy, thyroid dysfunction, neurological damage (hearing and vision loss), and polycythaemia. It is a well-documented complication of metal hip prostheses where cobalt-chromium particles are released.
Reference Ranges
| Range Type | Min | Max | Unit | Note |
|---|---|---|---|---|
| Lab Normal | — | 1 | µg/L | Standard lab reference range |
| Optimal | — | 0.5 | µg/L | Evidence-based optimal range for health |
| Longevity Target | — | 0.5 | µg/L | Per longevity medicine research (Attia et al.) |
Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.
Symptoms of Imbalance
- Cardiomyopathy — heart failure from cobalt toxicity
- Thyroid dysfunction (hypothyroidism)
- Hearing loss and tinnitus
- Visual impairment
- Peripheral neuropathy
How to Improve Your Levels
- 1Identify and eliminate exposure source (hip implant revision if needed)
- 2Chelation therapy (NAC, EDTA) in severe cases under medical supervision
- 3Occupational safety: PPE, ventilation in hard metal industries
- 4Regular monitoring if hip implant present
When to Test
Mandatory monitoring for patients with metal-on-metal hip implants. Also test in occupational screening for hard metal workers, or when unexplained cardiomyopathy, hypothyroidism, or neuropathy is present.
Related Biomarkers
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