DHT (dihydrotestosterone) is one of the primary drivers of acne. It binds to androgen receptors in your sebaceous (oil) glands with higher affinity than regular testosterone, stimulating those glands to grow larger and produce more sebum. That excess oil clogs pores and creates the environment where acne-causing bacteria thrive. But the relationship between DHT and breakouts is more nuanced than a simple cause-and-effect, and blood levels of DHT don’t always predict how bad your acne will be.
How DHT Triggers Breakouts
Your skin doesn’t just passively receive DHT from your bloodstream. It actively manufactures it. An enzyme called 5-alpha reductase, concentrated in your sebaceous glands, converts circulating testosterone into DHT right where it matters most. The type 1 version of this enzyme dominates in the skin, and its activity is heavily concentrated in the oil glands themselves rather than in surrounding tissue.
This local production explains why acne targets specific areas. Research measuring enzyme activity found that sebaceous glands from the face and scalp convert testosterone to DHT at roughly five to six times the rate of glands from non-acne-prone body areas (around 32 to 35 pmol/min/mg protein on the face and scalp versus just 6 pmol/min/mg in other regions). Your forehead, nose, and chin aren’t just oilier by coincidence. They’re small DHT factories.
Once produced, DHT binds tightly to androgen receptors inside the oil gland cells. Lab studies show it stimulates the proliferation of sebocytes (the cells that produce sebum) in a dose-dependent way, meaning more DHT leads to more cell growth and more oil. DHT is also more potent than testosterone at this job. While testosterone can partially activate the same receptors, it displaces only about 40 to 50 percent of DHT binding, making DHT the stronger signal by a wide margin.
Where Hormonal Acne Tends to Appear
DHT’s effects on the skin aren’t evenly distributed. Research has shown that DHT is more selective to sebocytes on the face compared to other body sites like the legs, which helps explain why acne clusters in predictable zones. Hormonal acne, the type most closely linked to androgen activity, concentrates along the lower third of the face: the chin, jawline, and sometimes the neck. Breakouts that appear as deep cysts or nodules, come on suddenly, or spread across a wide area are often a sign of excess androgen stimulation.
DHT Levels vs. Acne Severity
Here’s where the picture gets complicated. People with acne do tend to have higher circulating DHT than people without it. In one study of 270 acne patients and 80 controls, median DHT levels were significantly higher in the acne group (about 350 pg/ml versus 280 pg/ml). Testosterone and another androgen called DHEAS were also elevated.
But when researchers looked at whether higher DHT in the blood predicted worse acne, the correlation fell apart. DHT levels didn’t differ significantly between mild, moderate, and severe acne. Testosterone and DHEAS showed some association with severity, but DHT did not. This suggests that what matters most isn’t how much DHT is floating around in your bloodstream. It’s how sensitive your individual oil glands are to it, and how much DHT they produce locally. Two people with identical blood hormone levels can have very different skin.
This also explains why standard blood tests can come back “normal” even when someone clearly has hormonal acne. About 63 percent of acne patients in one study had at least one androgen level above the 95th percentile of normal, which means more than a third had textbook-normal hormone levels despite active breakouts.
The PCOS Connection
For women, the link between androgens and acne is especially relevant in the context of polycystic ovary syndrome. Women with PCOS are 1.6 times more likely to have adult acne than the general female population, and severe acne in women is a strong signal of possible androgen excess: 51 percent of patients with severe acne have been found to have PCOS. Both the ovaries and adrenal glands can overproduce androgens in PCOS, flooding the skin with more raw material for DHT production.
An expert panel convened by the Androgen Excess and PCOS Society recommends that all women with persistent adult acne get their testosterone, free testosterone, and DHEAS levels tested with high-quality assays. While DHT itself isn’t typically measured as a standalone diagnostic marker, these upstream hormones help identify whether androgen excess is fueling the problem.
How Anti-Androgen Treatments Work
Treatments that target the DHT pathway are among the most effective options for hormonal acne, particularly in women. The American Academy of Dermatology’s current guidelines recommend several therapies that work by reducing androgen activity at the skin level.
Spironolactone is one of the most widely used. It blocks androgen receptors in the oil glands, preventing both testosterone and DHT from delivering their growth signals. Lab research on human sebocytes shows it inhibits cell proliferation in a dose-dependent manner and directly counteracts the stimulatory effects of DHT. At higher concentrations, it reduced sebocyte growth by up to 50 percent.
Combined oral contraceptives work differently, suppressing ovarian androgen production and increasing a protein in the blood that binds to free testosterone, leaving less available for conversion to DHT. Both approaches are recommended in the AAD’s current guidelines alongside more familiar acne treatments like antibiotics and isotretinoin.
For men, anti-androgen therapy is generally not used for acne because of the side effects on sexual function and development. Standard treatments like topical retinoids, benzoyl peroxide, and oral antibiotics remain the primary approach, though isotretinoin can dramatically shrink sebaceous glands and reduce their sensitivity to androgens regardless of sex.
Why Some People Are More Susceptible
If DHT alone caused acne, everyone going through puberty (when androgen levels surge) would break out equally. They don’t. The key variable is the sensitivity and enzyme activity of your individual oil glands. Research has found that sebaceous glands in certain body regions, and in certain individuals, have greater binding affinity and capacity for androgens. Glands from acne-prone areas of the scalp, for instance, showed both a tighter grip on DHT molecules and more receptor sites available to catch them.
Genetics largely determine how many androgen receptors your oil glands express, how active your 5-alpha reductase enzymes are, and how your sebaceous glands respond to hormonal signals. This is why acne runs in families and why two siblings with similar hormone profiles can have dramatically different skin. DHT is the trigger, but the gun has to be loaded first.