Mercury

Mercury (Hg) is a biomarker classified under toxic metals. It serves as a reference point for information about mercury in the body, placing findings within the broader context of toxic-metal assessment.

Mercury is measured in a whole-blood sample. Fasting is not required, so the test can be arranged without scheduling around an empty-stomach collection. When arranging testing, confirm that the laboratory is ordering a whole-blood mercury measurement, since the sample type is part of how the result is defined.

Results are reported in μg/L and interpreted against the reference and optimal ranges shown with the test. Because lower is better for this biomarker, a result is generally more favorable when it is lower within those comparison ranges. The ranges shown do not differ by sex, so interpretation does not require choosing a separate male or female interval.

Selenium is listed as a related marker. A clinician or testing professional can explain which measurements are appropriate for an individual’s circumstances and how to interpret the result.

Interpret a Mercury result against the reference range and the tighter optimal range shown on the report. The reference range describes the laboratory’s usual comparison interval, while the optimal range is narrower. Because lower results are considered better for this biomarker, a result nearer the lower end is generally more favorable within the ranges provided.

A result should be read with its units and sample type in mind, and compared with the range printed on that specific report rather than with a range from another source. Laboratory ranges and reporting conventions can differ, so the same number may not have the same context when reported elsewhere.

A single value is not a diagnosis. Results outside the report’s reference range should be discussed with a clinician, who can interpret them alongside the reason for testing and other relevant health information.