Is it serious for males to have estradiol levels below 20?
Sep 12, 2022
Source: Cainiu Health
Dr. Pan Yongyuan
Introduction
A male estradiol level below 20 pmol/L, as measured by radioimmunoassay (RIA), is considered clinically significant. However, an estradiol level below 20 pmol/L, measured by time-resolved fluoroimmunoassay (TR-FIA), is generally not clinically significant. Low estradiol levels in males may indicate underlying pathological conditions such as anterior pituitary hypofunction or pituitary dwarfism, and therefore represent an abnormal finding.
When using radioimmunoassay to measure male estradiol levels, a result below 20 pmol/L is considered severe. However, when measured via time-resolved fluorescence immunoassay, such low values are generally not concerning.
Under normal circumstances, the reference range for male estradiol levels measured by radioimmunoassay is 110–264.2 pmol/L. Therefore, a test result below 20 pmol/L indicates a significantly low and abnormal level. In contrast, the normal range for male estradiol measured by time-resolved fluorescence immunoassay is 0–1.6 pmol/L, in which case the result is considered normal and does not require excessive concern.
Estradiol levels below the normal range in males may be caused by conditions such as hypopituitarism or pituitary dwarfism, which are abnormal. Individuals should promptly visit a hospital for further evaluation. Prior to testing, avoid consuming greasy or high-protein foods and refrain from alcohol consumption, as these may affect test results. During the examination, it's important to stay relaxed and avoid excessive anxiety, which could lead to blood vessel constriction and make blood collection more difficult.
