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By Vanessa Lyn Gonzales | 6 min read
If you have spent any time looking into menopause and hair loss, you will have seen oestrogen mentioned repeatedly. But there is another hormone — less discussed, less well understood, and arguably more directly responsible for the hair changes many women experience — that rarely gets explained properly.
It is called DHT. And once you understand what it is doing, you will never think about hair loss in quite the same way again.
Here is what the research actually shows.
What DHT is — and how it gets produced
DHT stands for dihydrotestosterone. It is a potent androgen — a hormone belonging to the same family as testosterone — produced when an enzyme called 5-alpha-reductase converts testosterone in the body's tissues.
Both men and women produce DHT. In men, it plays a role in prostate health and male pattern baldness.
In women, it is normally present at lower levels and its influence on hair follicles is suppressed by oestrogen.
This last point is the key to understanding what happens during perimenopause and menopause.
What changes during the menopausal transition
As oestrogen levels decline during the menopausal transition, two things happen simultaneously. First, oestrogen's direct suppressive effect on DHT activity at the hair follicle diminishes.
Second, progesterone — which also declines during perimenopause — is a natural inhibitor of 5-alpha-reductase, meaning it helps limit how much testosterone is converted into DHT in the first place. As both hormones fall, DHT has significantly less resistance.
The result: DHT binds more readily to receptors in hair follicles. Over time, this causes follicular miniaturisation — each growth cycle produces a finer, shorter strand than the one before, until the follicle may stop producing visible hair altogether.
This process is gradual, which is partly why women often do not connect what they are seeing to their hormonal transition until it has been progressing for some time.
This mechanism — not simply "low oestrogen" — is why trichologists and hair scientists increasingly talk about hormonal hair change as a distinct category that requires a distinct approach.
If you recognise what's described above, ThickTails has built a detailed guide to perimenopause and menopause hair changes — covering the hormonal science and how to build a consistent routine around it. Read the full guide here →
Why this is different from other types of hair loss
It is important to understand that DHT-driven hormonal hair loss in women is not the same condition as male pattern baldness, even though both involve DHT. The pattern is different — women typically experience diffuse thinning at the crown and parting, rarely reaching the total baldness seen in men.
The mechanism has subtle differences. And critically, some treatments that work for male pattern hair loss are not appropriate or effective for women.
Finasteride, for example — a pharmaceutical DHT-blocker licensed for male pattern hair loss — is generally not recommended for post-menopausal women and shows limited benefit at standard doses in clinical studies of women. Women's hormonal hair loss requires an approach tailored to female hormonal biology.
“DHT binds to receptors in hair follicles and causes progressive miniaturisation — finer, shorter strands with each growth cycle.”
What can help support follicles against DHT
This is where botanical ingredients with clinical research behind them become relevant. The goal, for women experiencing hormonal hair loss, is to support the follicular environment in a way that counters some of DHT's activity — gently and without the side effects of pharmaceutical intervention.
Saw palmetto extract is one of the most studied natural options. It works by inhibiting 5-alpha-reductase — the same enzyme that produces DHT — and has been the subject of multiple peer-reviewed clinical studies.
Research published in the dermatological literature has found it associated with improvements in hair quality, hair count, and density in study participants, with a low incidence of side effects. It addresses the mechanism at source.
Topical caffeine has a different but complementary mechanism. Research suggests that caffeine may help to extend the hair's anagen (growth) phase by counteracting some of DHT's effects at the follicle receptor level.
It has also been shown to improve scalp microcirculation and to penetrate the follicle from a brief shampoo application. Multiple clinical studies have examined its effects, including one open-label study that found a caffeine-based topical to be non-inferior to 5% minoxidil over a six-month period.
Red clover extract contains compounds called isoflavones that may help modulate DHT activity, and it has been studied specifically in post-menopausal women. A randomised clinical trial found significant improvements in hair parameters over 90 days among participants using red clover, compared to a control group.
Acetyl tetrapeptide-3 is a peptide that has been shown to support hair follicle anchoring and stimulate growth factors associated with the anagen phase. In a triple-blind randomised controlled trial, a combination of biochanin A (from red clover) and acetyl tetrapeptide-3 was found to have comparable efficacy to 3% minoxidil, with no adverse reactions reported.
The 90-day rule — and why it matters
The hair growth cycle operates on a timeline that does not respond to impatience. The anagen phase lasts months.
Changes to the follicular environment must work through the growth cycle before they manifest as visible changes in the hair. Research consistently points to 90 days as the earliest meaningful assessment point.
Many studies see their strongest outcomes at six months.
This is not a caveat designed to lower expectations. It is simply the biology of hair.
Consistent, targeted care over the right timeframe is what the evidence supports.
Now that you understand DHT, here's how to address it.
ThickTails has developed a hormone-aware system formulated around the botanical ingredients with published clinical support for DHT modulation in women during perimenopause and menopause. Use code HORMONEAWARE15 for 15% off your first order.
Build Your Hormone-Aware Routine →
Clinical references
1. Dhurat R, et al. "An Open-Label Randomized Multicenter Study Assessing the Noninferiority of a Caffeine-Based Topical Liquid 0.2% versus Minoxidil 5% Solution in Male Androgenetic Alopecia." Skin Pharmacology and Physiology, 2018. View on PubMed →
2. Evron E, et al. "Natural Hair Supplement: Friend or Foe? Saw Palmetto, a Systematic Review in Alopecia." Skin Appendage Disorders, 2020. View on PubMed →
3. Lueangarun S, Panchaprateep R. "An Herbal Extract Combination (Biochanin A, Acetyl Tetrapeptide-3, and Ginseng Extracts) versus 3% Minoxidil Solution for the Treatment of Androgenetic Alopecia." Journal of Clinical and Aesthetic Dermatology, 2020. View on PubMed Central →
Vanessa Lyn Gonzales writes about women's health, hormonal transitions, and midlife wellbeing. This article is for informational purposes and does not constitute medical advice. Please consult your GP or a qualified trichologist regarding any health concerns.
