Cobalt Blood Test in California

What this test measures

This test measures the concentration of cobalt in serum or whole blood, depending on the laboratory method. Cobalt is needed in tiny amounts as part of vitamin B12, but higher exposures can occur through inhalation or ingestion in industrial settings. Metal-on-metal hip replacements and other cobalt-containing implants can also release particles over time. Measuring blood cobalt helps evaluate whether exposure is elevated relative to reference ranges.

The sample is collected by venipuncture using trace-element collection tubes to avoid contamination. Laboratories generally analyze cobalt with inductively coupled plasma mass spectrometry, a method sensitive enough to detect very low concentrations. Because cobalt exposure often occurs alongside other metals, related tests such as chromium or nickel may be ordered at the same time. Kidney function markers can also be included to provide context.

People typically order cobalt blood testing when they work with cobalt-containing materials, have a metal implant being monitored, or experience symptoms that a provider suspects may relate to metal exposure. The test supports evaluation and monitoring rather than diagnosis on its own. Results should always be reviewed by a qualified healthcare provider who knows your exposures and medical background.