DHT (dihydrotestosterone) is the androgen that drives male pattern hair loss, prostate growth, and a chunk of what men blame on "low T" without ever having it measured. Testing DHT levels men actually deal with day to day tells you more about hair, libido, and prostate risk than a testosterone number alone.
- DHT levels men are tracking matter most alongside total testosterone, free testosterone, and SHBG, never as a standalone number.
- DHT is 3 to 5 times more potent than testosterone at the androgen receptor and drives androgenetic alopecia in genetically susceptible follicles.
- Starting testosterone therapy raises DHT because it raises the substrate 5-alpha-reductase converts, so a DHT bump on TRT is expected, not a dosing error.
- GoodLife Health's Cardiometabolic Optimization Membership rechecks DHT-relevant hormone markers every 90 days through its Biomarker Audit - a reasonable buy for men who want measured tracking instead of guessing at hair loss and libido changes.
Why this matters
Most men who ask about DHT are really asking one of three questions: why is my hairline moving, why did my libido change, or why did my doctor mention my prostate. DHT sits underneath all three. It is made when the enzyme 5-alpha-reductase converts testosterone into DHT in the skin, scalp, and prostate, and once it's bound to the androgen receptor it acts with far more force than testosterone itself.
The mistake most men make is treating DHT like a single villain to eliminate. In 2026, the more accurate framing GoodLife Health uses with patients is systemic: testosterone, DHT, SHBG, thyroid function, and metabolic markers move together. A man with low testosterone symptoms and normal DHT needs a different conversation than a man with normal testosterone and elevated DHT-driven hair loss. Same complaint on the surface, different lab picture, different plan.
A man with low testosterone symptoms and normal DHT needs a different conversation than a man with normal testosterone and elevated DHT-driven hair loss. Same complaint on the surface, different lab picture, different plan.
What DHT actually does in the body
DHT binds the androgen receptor with roughly three to five times the affinity of testosterone. That potency is why small shifts in DHT produce outsized effects on hair follicles, sebaceous glands, and prostate tissue, even when total testosterone looks unremarkable on a standard panel.
In hair follicles genetically sensitive to androgens, DHT triggers a shrinking process called miniaturization: each growth cycle produces a thinner, shorter hair until the follicle stops producing visible hair at all. This is androgenetic alopecia, the most common form of hair loss in men, and it is a receptor-sensitivity problem as much as a hormone-level problem. Two men with identical DHT levels can have completely different amounts of hair loss because their follicles respond differently.
DHT also drives benign prostatic hyperplasia (BPH), the age-related prostate enlargement that shows up as urinary symptoms in men over 50. That's one reason DHT doesn't get evaluated in isolation inside a hormone optimization plan; it gets tracked alongside PSA, testosterone, and the rest of the panel your clinician is already reading.
Assessing DHT levels: the process
1. Rule out the obvious first
Before ordering anything, a clinician reviews family history of pattern baldness, timeline of hair changes, libido and erectile changes, and any current testosterone or finasteride-type medication use. Pattern baldness that runs in the family points toward follicle sensitivity, not necessarily a DHT level out of range.
2. Order the right panel, not just DHT
DHT drawn alone tells you almost nothing. A useful panel pairs total testosterone, free testosterone, SHBG, and DHT together, because SHBG determines how much testosterone is even available to convert. Reading your testosterone lab results in isolation, without DHT and SHBG on the same requisition, is a common reason men get an incomplete answer from a rushed primary care visit.
3. Draw the sample under consistent conditions
Androgens follow a diurnal rhythm and peak in the morning, so labs drawn before 10 a.m. give a more reliable read than an afternoon draw. Fasting isn't strictly required for DHT itself, but a fasting draw lets the same blood sample cover glucose and lipid markers without a second visit.
4. Interpret DHT against a range, not a single cutoff
Many labs report normal total DHT in adult men somewhere between roughly 25 and 75 ng/dL, though the exact reference range shifts depending on the assay a given lab uses. A number sitting at the top of a reference range with aggressive hair loss and a number sitting at the bottom of the range with mild thinning are two different clinical pictures, not the same problem at different severities.
5. Separate DHT-driven hair loss from other causes
Thyroid dysfunction, iron deficiency, and chronic stress all cause hair shedding patterns that look similar to androgenetic alopecia at first glance but respond to completely different treatment. This is exactly why DHT gets checked inside a broader panel that also covers thyroid and metabolic markers rather than as a single isolated test ordered because a man is worried about his hairline.
6. Expect DHT to move if testosterone therapy starts
Adding exogenous testosterone increases the substrate available for 5-alpha-reductase to convert, so DHT commonly rises alongside testosterone during treatment. That's an expected physiological response, not automatically a sign the dose or protocol is wrong, and it's one of the protocol adjustments that matter a clinician watches for over the first several months.
7. Recheck on a schedule instead of once and done
A single DHT draw is a snapshot. Hormone levels drift with age, body composition changes, medication changes, and stress, so tracking the trend across multiple draws over a year tells you far more than one number ever will.
Where the DHT conversation gets confused
A separate class of medications, 5-alpha-reductase inhibitors such as finasteride and dutasteride, works specifically by blocking the conversion of testosterone into DHT. Clinical trial data on these drugs shows finasteride lowers serum DHT by roughly 70%, and dutasteride, which blocks a broader set of the enzyme's isoforms, lowers it closer to 90%. That is a fundamentally different mechanism than testosterone replacement therapy, and it is worth understanding the distinction even outside a specific treatment plan, because it explains why some men on hair loss medication see their hairline stabilize while their testosterone number stays flat.
Finasteride vs. dutasteride
Both block DHT conversion, but not to the same degree
| Medication | Mechanism | DHT reduction |
|---|---|---|
| Finasteride | Blocks conversion of testosterone into DHT | Roughly 70% |
| Dutasteride | Blocks a broader set of the enzyme's isoforms | Closer to 90% |
Bioidentical hormone optimization, the approach GoodLife Health's clinical protocols are built around, works from the opposite direction: it addresses testosterone, thyroid, and related hormone deficiencies rather than blocking a single downstream conversion. Board-certified physicians of Beluga Health, P.A., working under those protocols, decide what's clinically appropriate based on the full panel, not a single symptom.
Troubleshooting common DHT problems
"My DHT is normal but I'm still losing hair." Follicle sensitivity to DHT varies by genetics, so a man with an unremarkable DHT number can still have significant androgenetic alopecia if his follicles are highly reactive. The fix is evaluating family history and hair loss pattern alongside the lab, not chasing the number lower.
"My hair loss got worse after starting testosterone therapy." This is the DHT rise from added substrate described above. It's a known, common response and one reason a clinician tracks DHT alongside testosterone during the first several months of any protocol rather than checking testosterone alone.
"My doctor only checked total testosterone, not DHT or SHBG." That's an incomplete workup for a man reporting hair loss, libido changes, or urinary symptoms tied to prostate size. Ask specifically for DHT and SHBG to be added to the requisition.
"I want lower DHT without losing muscle or libido." This is the real tradeoff with 5-alpha-reductase inhibitors: some men report reduced libido or mood changes on these medications, which is part of why the decision belongs in a conversation with a clinician who is looking at the whole hormone panel, not a single symptom in isolation.
"My labs came back within range but I still feel off." A number sitting inside a wide reference range doesn't mean it's optimal for you individually. Tracking the same markers over multiple 90-day cycles shows whether a level is trending in a direction worth addressing.
Tools and resources
- A morning blood draw, ideally before 10 a.m., for the most reliable androgen reading
- A panel that includes DHT, total testosterone, free testosterone, and SHBG together, not DHT alone
- Family history of pattern baldness and a timeline of hair, libido, or urinary changes to bring to the visit
- Low testosterone symptoms in men as a reference for what else to flag to your clinician
- A repeat-testing cadence, since one draw is a snapshot and a trend across quarters is data
GoodLife Health structures this around its flat $299-a-month Cardiometabolic Optimization Membership, which includes a comprehensive Biomarker Audit every 90 days run through the Beluga Health lab network. That's four full panels a year covering hormone, thyroid, and metabolic markers, not a one-time hair loss test ordered in isolation. Membership starts with a two-month commitment ($598 first charge), then runs month to month with the option to cancel after.
What to do next
If hair loss, libido changes, or prostate symptoms are the reason DHT came up, the next step isn't a single test, it's a clinician reading DHT next to testosterone, SHBG, and the rest of a hormone panel to figure out which lever actually applies to your case. One flat fee covers the doctor, and medication, when it's part of the plan, is billed at pharmacy cost with zero markup.
FAQ
What is a normal DHT level for men?
Many labs report normal total DHT in adult men between roughly 25 and 75 ng/dL, though the exact range depends on the assay a given lab uses. A single number matters less than how it compares to your own testosterone, SHBG, and prior results.
Does high DHT always cause hair loss?
No. Hair loss depends on how sensitive your specific hair follicles are to DHT, not just the circulating level. Men with similar DHT levels can have very different amounts of hair thinning based on genetics.
Can testosterone therapy make hair loss worse?
Testosterone therapy commonly raises DHT because it increases the substrate available for conversion by 5-alpha-reductase. That can accelerate hair loss in men who are already genetically prone to androgenetic alopecia.
How do you test DHT levels in men?
DHT is measured with a blood draw, ideally in the morning before 10 a.m. when androgen levels peak. It should be ordered alongside total testosterone, free testosterone, and SHBG rather than as a standalone test.
Can you lower DHT without lowering testosterone?
5-alpha-reductase inhibitors like finasteride and dutasteride specifically block the conversion of testosterone into DHT, lowering DHT by roughly 70% to 90% in clinical trials while leaving testosterone largely intact. That is a different mechanism than testosterone replacement therapy.
Does DHT affect libido and erections?
DHT contributes to libido alongside testosterone, and medications that sharply lower DHT are sometimes associated with reduced libido in a subset of men. This tradeoff is a reason DHT-lowering treatment decisions belong in a conversation with a clinician reviewing the full hormone picture.
Is DHT bad for prostate health?
DHT drives benign prostatic hyperplasia, the age-related prostate enlargement common in men over 50. That's one reason DHT gets tracked alongside PSA and testosterone rather than reviewed on its own.
How often should men recheck DHT levels?
A single draw is a snapshot, so tracking DHT over multiple testing cycles, roughly every 90 days if you're on an active hormone protocol, shows whether a level is trending toward or away from a problem.
One last thing
The number men fixate on is rarely the number that explains their hair loss. Two men can walk in with the exact same DHT level and leave with completely different plans, because follicle sensitivity, SHBG, and testosterone availability shape what that DHT number actually means for each of them individually. Chasing DHT down without looking at the rest of the panel is how men end up disappointed with a treatment that was never going to touch their actual problem.
The number men fixate on is rarely the number that explains their hair loss.
Related guides
- Protocol adjustments that matter for testosterone therapy after 50
- How to prevent hair thinning on hormone replacement therapy
References
- Tirzepatide Once Weekly for the Treatment of Obesity (SURMOUNT-1). 2022. pubmed.ncbi.nlm.nih.gov/35658024/
- Once-Weekly Semaglutide in Adults with Overweight or Obesity (STEP 1). 2021. pubmed.ncbi.nlm.nih.gov/33567185/