/WHAT_IT_IS
Prolactin is a pituitary hormone primarily involved in lactation but also regulates the HPTA in men. Elevated prolactin can suppress testosterone independently of TRT.
/NORMAL_RANGE
Adult male reference: 4.0–15.2 ng/mL.
What does high Prolactin mean?
- +Prolactinoma (pituitary tumor) — most common pathologic cause.
- +Hypothyroidism, certain medications (antipsychotics, opioids).
- +Chronic stress, recent sex or nipple stimulation (transient).
What does low Prolactin mean?
- +Generally not clinically significant in men.
/ON_TRT
Elevated prolactin can cause low libido and erectile dysfunction independent of testosterone levels. If your T is in the upper range but libido is poor, check prolactin. Pathologic elevations (>2x upper limit) warrant pituitary imaging.
/RELATED
/TRACK_THIS
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