The Dihydrotestosterone (DHT) test measures a potent and active form of testosterone that is linked to specific hormonal symptoms. In men, DHT is the primary hormone responsible for prostate enlargement (BPH) and male-pattern hair loss. In women, high levels are a key indicator for 'hirsutism' (unwanted male-pattern hair growth). This specialized blood test is essential for getting to the root, hormonal cause of these specific, often distressing, symptoms. A simple blood draw is required. This test provides the specific, actionable data your doctor needs to create a targeted and effective treatment plan.