Pubic hair greys for the same fundamental reason head hair does: the pigment-producing cells in each hair follicle gradually stop working. Because pubic follicles cycle differently and sit in a distinct hormonal environment, greying there tends to start later than on the scalp, but it follows the same biological trajectory. A Japanese forensic study found that grey pubic hairs could appear as early as the early thirties in men and mid-thirties in women, though widespread greying typically showed up decades later.1PubMed. Age estimation by appearance of gray hair in pubic hair The process is universal, and the science behind it has become considerably clearer over the past two decades.
Why Any Hair Goes Grey in the First Place
Hair colour comes from melanin, a pigment manufactured by specialised cells called melanocytes that sit near the base of each hair follicle. These melanocytes inject pigment granules into the growing hair shaft during the active growth phase of the hair cycle. The colour you see is essentially a frozen record of the pigment-making activity that occurred while that strand was being built.2PubMed Central. Hair follicle pigmentation
When hair turns grey or white, the follicle hasn’t changed shape or stopped growing. It has simply run out of functioning melanocytes. Research in both mice and humans has shown that this happens because the reservoir of melanocyte stem cells in the follicle gradually depletes over time. These stem cells normally replenish the active melanocytes at the start of each new growth cycle. As they disappear, fewer pigment-producing cells get recruited, and eventually the hair shaft grows in without any colour at all.3PubMed. Mechanisms of hair graying: incomplete melanocyte stem cell maintenance in the niche The stem cells don’t simply die quietly; they appear to differentiate prematurely inside the niche where they are supposed to remain dormant, effectively using themselves up before they are needed.4Cell. The Melanocyte Stem Cell: Mammalian Hair Graying and Stem Cell Maintenance
This stem-cell exhaustion process is progressive and, so far, irreversible once it reaches a certain point. A follicle that has lost all of its melanocyte stem cells cannot spontaneously regain pigment production. The loss also appears to be follicle-by-follicle rather than all-at-once, which is why greying usually starts as a scattering of individual white or silver hairs rather than a sudden blanket change.5PubMed. Melanocyte stem cells and hair graying
What Makes Pubic Hair Different from Scalp Hair
Your body has several distinct populations of hair follicles, and they don’t all age at the same rate. Scalp hair follicles typically have the longest active growth phase, lasting years at a time. Pubic hair follicles have a much shorter growth phase, which is why individual pubic hairs don’t grow nearly as long as the hair on your head. This growth-cycle difference matters for greying because melanocytes are active only during the growth phase and undergo a kind of mini-retirement during the resting phase. With each full cycle of growth, rest, and shedding, the follicle’s pigment system has to rebuild itself from the stem-cell pool.6PubMed. Graying: gerontobiology of the hair follicle pigmentary unit
After roughly the first ten or so cycles of any given follicle, the pigment system starts showing signs of wear. For scalp hair, where each cycle can last several years, ten cycles might take decades. For pubic hair, where cycles are shorter but the total lifespan of the follicle is also different, the timeline shifts. Most people notice grey scalp hairs well before grey pubic hairs, though there’s significant individual variation. Some people report finding their first grey pubic hair in their late twenties; for others, it doesn’t happen until their fifties or later.
When Pubic Hair Typically Starts Greying
The best direct data on pubic-hair greying timelines comes from forensic science, where researchers study hair changes as a way to estimate the age of unidentified individuals. A study that examined pubic hair samples found that grey pubic hairs could first appear in men around age 30 and in women around age 36. However, having every pubic hair turn grey (or at least 75% of them) didn’t happen until roughly age 55 at the earliest, and full greying wasn’t universal until past age 65.1PubMed. Age estimation by appearance of gray hair in pubic hair
Those numbers are averages across a specific population, and individual variation is enormous. Genetics plays a heavy hand in determining when greying starts at any body site. Family history of premature greying is a significant predictor: one study found that about 39% of people with premature grey hair had a family history of it.7PubMed Central. Risk Factors Associated with Premature Hair Greying of Young Adult Ethnicity also shapes the timeline. Greying before age 20 in white populations, before 25 in Asian populations, and before 30 in African populations is considered premature, which gives a rough sense of how the normal schedule varies across groups.7PubMed Central. Risk Factors Associated with Premature Hair Greying of Young Adult These thresholds apply to scalp hair, but the same genetic influences shape the timing at other body sites including the pubic region.
The Role of Oxidative Stress
Beyond the slow depletion of stem cells, there’s a chemical dimension to greying that applies everywhere on the body. Hair follicles, like all living tissue, generate reactive oxygen species as a byproduct of normal metabolism. Younger follicles handle this well because they produce antioxidant enzymes that neutralise these molecules before they cause damage. As you age, two things happen simultaneously: the follicles produce more reactive oxygen species, and their antioxidant defences weaken.8PubMed Central. Oxidative stress in ageing of hair
One key enzyme in this process is catalase, which breaks down hydrogen peroxide. Research has shown that grey and white hair follicles accumulate hydrogen peroxide at remarkably high concentrations, and that catalase expression in those follicles is almost entirely absent.9PubMed. Senile hair graying: H2O2-mediated oxidative stress affects human hair color by blunting methionine sulfoxide repair In a study comparing pigmented and unpigmented hair follicles, catalase expression was reduced roughly 44-fold in the unpigmented bulbs.10PLoS ONE. Premature Graying as a Consequence of Compromised Antioxidant Activity in Hair Bulb Melanocytes and Their Precursors Without catalase to neutralise it, hydrogen peroxide essentially bleaches the hair from within. This mechanism operates in every follicle on the body, pubic ones included.
The practical implication of the oxidative-stress story is that anything accelerating free-radical damage in the body can, in theory, speed up greying. Smoking, poor nutrition, and chronic illness are all associated with increased oxidative load. Whether you can meaningfully slow follicle-level oxidative damage through diet or supplements remains an open question. There’s no convincing clinical evidence that popping antioxidant pills reverses or even delays greying.
Can Stress Really Turn Your Hair Grey
The folklore about stress turning hair grey has more science behind it than people typically expect. A landmark study published in Nature demonstrated the mechanism in mice: under stress, the sympathetic nervous system releases a flood of noradrenaline directly into the area around melanocyte stem cells. This burst of signalling forces the dormant stem cells to activate all at once, rapidly proliferate, differentiate, and then permanently vacate the niche. The result is an irreversible loss of the stem-cell reservoir in the affected follicles.11PubMed Central. Hyperactivation of sympathetic nerves drives depletion of melanocyte stem cells
The key detail is that this stress-driven greying works through the sympathetic nerves that physically innervate each follicle, not through cortisol or immune cells as researchers initially suspected. The noradrenaline acts on specific receptors on the melanocyte stem cells, pushing them out of their quiescent state.12Journal of Clinical Pharmacy and Therapeutics. Natural Compound Isoliensinine Inhibits Stress‐Induced Hair Greying by Blocking β2‐Adrenoceptor Since sympathetic nerve fibres reach follicles across the body, this mechanism is not limited to the scalp. A period of intense stress could, in principle, accelerate greying in pubic hair and body hair just as readily as in head hair. In practice, the scalp is where people notice first, simply because it is visible.
There are some tantalising hints that stress-related greying might be partially reversible in early stages. Small studies and case reports have documented individual grey hairs regaining colour after a stressful period ends, suggesting that if the stem-cell pool isn’t fully depleted, recovery is possible. But this is far from established science, and it certainly doesn’t apply once the stem cells are entirely gone from a follicle.
Does the Order of Greying Follow a Pattern
Most people notice a rough sequence: temples and sideburns first, then the rest of the scalp, facial hair, body hair, and pubic hair trailing behind. This isn’t a strict rule but rather a trend shaped by the different cycling speeds and hormonal environments of each follicle type. The hair follicle pigmentation system is described in research as one of the body’s most visible aging sensors, showing dilution of pigment intensity long before comparable changes appear in the skin itself.13PubMed Central. Aging of the hair follicle pigmentation system
Beard hair often greys before pubic hair, which surprises some people. The chin and jaw area seems to be biologically intermediate between the scalp and the groin in terms of greying pace. Eyebrows tend to grey relatively late for many individuals, which is why it can look odd when someone has a fully grey head of hair but still-dark brows. Chest hair, arm hair, and leg hair each have their own timelines. None of this is medically meaningful; it’s simply a reflection of follicle-by-follicle variation in stem-cell resilience.
Some people do buck the pattern entirely, finding grey pubic hairs before any grey appears on their head. This can be alarming if you aren’t expecting it, but it falls within the range of normal variation. As long as greying is gradual and occurs after your mid-twenties (or later, depending on ethnic background), it’s not a sign of anything wrong.
When Premature Greying Might Signal Something Else
Greying that starts very early, particularly before the age of 20, warrants a conversation with a doctor. Premature greying has been associated with certain autoimmune conditions, thyroid disorders, and vitamin deficiencies, especially B12, iron, and copper. A clinical review noted that patients presenting with premature grey hair should be assessed for metabolic diseases and associated syndromes.14PubMed Central. Premature Graying of Hair: Review with Updates The same applies to premature greying of pubic hair, though it is less commonly reported to doctors, probably because people don’t inspect their pubic region the way they do the mirror each morning.
If you notice pubic hair greying unusually early, particularly alongside other symptoms like fatigue, skin changes, or hair loss, it’s worth mentioning. Correcting an underlying deficiency can sometimes halt the progression of premature greying at any body site, though it rarely reverses hairs that have already lost pigment.
Sex Differences in Pubic Hair Greying
The forensic data on pubic-hair greying showed a slight sex difference in onset: men could develop their first grey pubic hairs around age 30, while for women the earliest onset was closer to 36.1PubMed. Age estimation by appearance of gray hair in pubic hair The gap narrowed at more advanced stages. By the time people reached their sixties and beyond, both sexes had comparable levels of greying.
It’s tempting to attribute this gap to hormonal differences, and androgens likely play some role in follicle dynamics in the pubic region. But the evidence here is indirect. The pubic region is an androgen-dependent hair site, meaning the hair itself is influenced by sex hormones in ways that scalp hair is not. Whether this hormonal sensitivity translates into a meaningfully different greying trajectory, or whether the slight sex difference is primarily genetic, hasn’t been well studied. Researchers have generally focused on scalp greying because it is easier to photograph, measure, and standardise.
Grooming, Visibility, and Why This Question Keeps Coming Up
Part of the reason “do your pubes turn grey” is such a common search is practical: widespread pubic grooming means many people see less of their pubic hair than previous generations did, and they may notice greying later or not at all. Conversely, someone who lets their pubic hair grow naturally after years of shaving or waxing might be startled by the grey that appeared while they weren’t looking.
Shaving or waxing has no effect on whether the underlying follicle produces pigment. A hair that grows back after being removed will be whatever colour its follicle is currently producing. If the follicle’s melanocyte stem cells have depleted during the time you were removing the hair, the new growth will come in grey or white regardless of whether you previously saw it at that colour. This is a straightforward consequence of the biology already described: pigment status is determined deep inside the follicle, not by anything that happens to the shaft above the skin surface.
There is also no evidence that laser hair removal, electrolysis, or chemical depilatories alter the timeline of greying in treated areas. These methods damage or destroy the follicle structure itself, which is a separate matter from the pigmentation cycle. Interestingly, laser hair removal becomes less effective once hairs go grey, because the technology relies on melanin in the hair shaft to absorb the laser energy. A grey or white hair has too little pigment to respond. So ironically, the greying of pubic hair can make certain hair-removal methods obsolete before the person expected.
Dyeing Pubic Hair
Products marketed for colouring pubic hair do exist, though the area presents challenges that scalp dyeing doesn’t. The skin of the genital region is thinner, more sensitive, and more prone to irritation from chemicals like ammonia and peroxide found in standard hair dyes. Products specifically formulated for pubic use tend to be gentler, with shorter processing times and lower concentrations of active ingredients. Standard boxed hair dye from the drugstore is not designed for application to mucous membranes or the thin skin of the groin, and dermatologists generally caution against using it there.
Some people use semi-permanent or vegetable-based dyes as a compromise, since these sit on the hair shaft rather than penetrating it and involve fewer harsh chemicals. The results are less durable but also less likely to cause contact dermatitis. Anyone who has had allergic reactions to hair dye on their scalp should be especially cautious about applying similar products in the pubic region, where absorption through the skin is faster and the consequences of a reaction are more uncomfortable.