How to prepare
Fasting for at least 8 hours before this test is recommended for the most meaningful result, as recent food intake can affect chromium levels. Drink plain water during the fasting period.
Let your practitioner know about any chromium-containing supplements you take. Avoid these for at least 24 to 48 hours before the test unless advised otherwise. A healthcare professional will take a blood sample from a vein in your arm.
After the test
Review your result with your GP, endocrinologist, or a practitioner familiar with metabolic health. Chromium results are most useful when reviewed as part of a broader picture of blood sugar and insulin function.
If chromium is low, your practitioner may discuss dietary sources of chromium (whole grains, broccoli, nuts, lean meats) or whether supplementation is appropriate for your specific situation.
Your test results will be available in your private dashboard. If there are any urgent issues, we'll let you know so you can follow up with your health professional.
Understanding results
Results are reported in nanomoles per litre (nmol/L) or nanograms per millilitre (ng/mL). Reference ranges are very low compared to other minerals, as chromium is present in the body in trace amounts only. Your result report will include the laboratory's reference range.
Chromium is present in blood at very low concentrations, and measurement requires specialised analytical techniques. Low chromium has been associated with impaired glucose tolerance and reduced insulin sensitivity, though establishing chromium deficiency from serum levels alone can be challenging due to the low concentrations involved.
Your practitioner will interpret this result alongside fasting glucose, insulin, HbA1c, and other relevant metabolic markers rather than in isolation.