Prolactin

Prolactin, also known as PRL, is a biomarker classified among sex hormones. It is expressed in ng/mL, providing a standardized way to report prolactin measurements.

Prolactin is tested using a serum sample collected from blood. The result is reported in ng/mL and interpreted against the reference information shown with the test, including general, sex-specific, and optimal ranges. These ranges provide context for understanding where a result falls rather than changing how the sample is collected.

Fasting is not required for prolactin testing, so the test does not need to be scheduled after a period without food solely because prolactin is being measured. If several blood tests are arranged together, the laboratory or clinician can confirm whether any other test has separate preparation requirements.

When clinically relevant, prolactin may be considered alongside related markers such as Testosterone Total, Estradiol, and Dopamine Plasma. Interpretation should account for the full clinical context rather than relying on the prolactin result alone.

Interpret a Prolactin result against the reference range printed on the same laboratory report. A value inside that interval is within the laboratory’s reference range, while the optimal range is a narrower interval used for a more specific interpretation. These ranges are not interchangeable, and the applicable range may also differ by sex.

Laboratories can use different reference ranges and units, so a number has meaning only in the context of the range, unit, and sample information shown on that report. The result described here is based on a serum sample, and fasting is not required.

A single Prolactin value is not a diagnosis. Results outside the report’s reference range should be discussed with a clinician, who can interpret the finding alongside the wider clinical context.

Trials that measured prolactin directly found no meaningful change with Resveratrol, Ashwagandha, or Maca Root. Because prolactin has an optimal range, an unchanged result means these interventions did not shift the measured marker during the study periods; it does not indicate whether an individual’s prolactin level was within that range.

Across these assessments, prolactin was generally rechecked after 5.7 to 16.0 weeks. These findings describe the measured marker itself, rather than effects on related outcomes, and they do not establish that the same result applies to every person or circumstance.