Doctor's Assessment Included
Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
Prolactin
Prolactin is a pituitary hormone that, when elevated in men, may suppress testosterone production and affect libido and energy. Monitoring prolactin is important for understanding your complete hormonal picture.
Reference Ranges
Low
4
Normal
15.2
High
Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.
What It Measures
This test measures the concentration of prolactin in your blood. Prolactin is produced by the anterior pituitary gland and plays a role in breast milk production, reproductive function, and various metabolic and immune processes.
Why It Matters
For men, elevated prolactin may be associated with decreased testosterone, reduced sex drive, and fatigue. Keeping prolactin in a healthy range supports optimal testosterone function and male vitality.
When to Test
Testing may be recommended if you experience irregular menstrual periods, unexplained milk discharge, infertility, decreased libido, or headaches and visual changes. Testing is typically done in the morning for most accurate results.
Symptoms
Low Levels
Low prolactin is uncommon and usually not associated with significant symptoms. In postpartum women, very low levels may be associated with difficulty breastfeeding. Consult your healthcare provider for interpretation.
High Levels
Elevated prolactin may be associated with irregular or absent periods, unexpected milk production, headaches, decreased libido, or erectile dysfunction in men. Very high levels could suggest a pituitary adenoma.
Lifestyle Tips
Stress management, adequate sleep, and avoiding medications known to raise prolactin may help maintain healthy levels. Regular exercise at moderate intensity is often beneficial. Consult your healthcare provider about any medications that may affect prolactin.
Frequently Asked Questions
Can medications affect prolactin levels?
Yes, many medications including certain antipsychotics, antidepressants, and anti-nausea drugs can raise prolactin levels. Always inform your healthcare provider about your medications before testing.
Is prolactin testing only for women?
No, prolactin testing is important for both men and women. In men, elevated prolactin may affect testosterone levels, libido, and fertility.
What time of day should prolactin be tested?
Prolactin levels are typically highest in the early morning. Testing is usually recommended in the morning after fasting, while avoiding stress and strenuous exercise beforehand.