Eyelashes can absolutely turn gray, but they tend to hold onto their color far longer than the hair on your head. Research on eyelash hair follicles has confirmed that they undergo graying “significantly later” than scalp hair follicles, and some people never see fully white lashes at all.1PubMed. Biology of the eyelash hair follicle: an enigma in plain sight The reasons behind this delay are genuinely interesting, and there are also situations where lashes lose their pigment much earlier than expected.
When Eyelashes Typically Start to Gray
A forensic study that examined eyebrow and eyelash whitening across age groups found no eyelash whitening at all in people aged 1 to 40. Whitening first appeared in the 41-to-50 age group. Among those who did show eyelash whitening, the average age was roughly 64, compared to about 42 for people whose lashes still had full color.2PubMed Central. Age estimation using level of eyebrow and eyelash whitening For context, most people start noticing gray scalp hair in their 30s. So your lashes have a roughly two-decade head start on color retention compared to the hair on your head.
Even among older adults, full whitening of the lashes is uncommon. One review noted that eyelashes become grayish at a very advanced age and rarely go completely white.3Journal of Optometry. The eyelash follicle features and anomalies: A review This stands in sharp contrast to scalp hair, which progressively loses pigment over the decades and can go entirely white. The gap is striking enough that researchers have investigated what makes eyelash follicles special.
Why Eyelashes Hold Their Color Longer
The leading explanation centers on a pigment-related enzyme called dopachrome tautomerase, also known as TRP-2. When researchers compared eyelash follicle melanocytes (the cells that produce pigment) to scalp hair follicle melanocytes, they found something unexpected: this enzyme was actively expressed in eyelash follicles but was absent in scalp hair follicles.4British Journal of Dermatology. Human eyelash characterization TRP-2 appears to help protect melanocytes from the oxidative damage that gradually kills off pigment-producing cells in other body hair. The sustained expression of this enzyme in lash follicles may directly explain why eyelash pigmentation hangs on so long, though researchers have noted that more work is needed to confirm the cause-and-effect relationship.3Journal of Optometry. The eyelash follicle features and anomalies: A review
There are also structural differences that might play a role. Eyelash follicles have a shorter hair growth cycle than scalp follicles, they produce shorter hair shafts, and they lack the tiny muscle (the arrector pili) that scalp hairs have.1PubMed. Biology of the eyelash hair follicle: an enigma in plain sight Whether these differences directly contribute to delayed graying or simply reflect the broader uniqueness of eyelash biology is still an open question. But the combination of enzyme protection and a distinct growth cycle makes the eyelash follicle a genuinely different environment from what sits on top of your head.
The Oxidative Stress Behind All Hair Graying
To understand why eyelashes eventually do gray, it helps to know what goes wrong in any hair follicle when color fades. The process starts with a gradual decline in the machinery that produces melanin, the pigment responsible for hair color. Enzyme activity drops, the transfer of pigment packets into growing hair cells becomes less efficient, and the melanocytes in the active part of the follicle start dying off.5PubMed. The biology of human hair greying Over time, the reservoir of melanocyte stem cells that replenish those working cells also shrinks. Once that reservoir is depleted, graying becomes largely irreversible.
A major driver of all this damage is oxidative stress, particularly from hydrogen peroxide. Gray and white hair follicles accumulate hydrogen peroxide at remarkably high concentrations, and the enzyme that normally breaks it down, catalase, becomes almost absent in those follicles.6PubMed. Senile hair graying: H2O2-mediated oxidative stress affects human hair color by blunting methionine sulfoxide repair This creates a vicious cycle: without enough catalase, hydrogen peroxide builds up and damages the very cells and enzymes needed to make pigment.7PLoS ONE. Premature Graying as a Consequence of Compromised Antioxidant Activity in Hair Bulb Melanocytes and Their Precursors The same oxidative damage also undermines the melanocyte stem cell pool, cutting off future pigment production at its source.8PubMed. Age-induced hair greying – the multiple effects of oxidative stress
This same process eventually reaches eyelash follicles too, but the protective enzyme environment described earlier appears to slow the timeline considerably. When eyelashes do gray, the underlying mechanism is the same oxidative cascade. The difference is how long the follicle holds it off.
When Eyelashes Gray Early
While age-related eyelash graying happens late and gradually, there are medical situations where lashes lose their color prematurely and sometimes abruptly. The clinical term for a localized patch of white hair is poliosis, and it can affect any hair-bearing area, including the eyelashes.9Journal of the American Academy of Dermatology. Poliosis circumscripta: Overview and underlying causes When poliosis shows up on the eyelids, it tends to get noticed quickly because there is so little hair there and the contrast against the skin is obvious.
Vitiligo is one of the most common causes. Because vitiligo involves the immune system destroying melanocytes, and those melanocytes live in hair follicles as well as in the skin, people with vitiligo around the eyes frequently develop white eyelashes as melanocytes within the follicles are destroyed.10PubMed Central. Eyelash Dyeing for Poliosis of Eyelashes in Patients With Vitiligo The whitening can be partial, affecting just a few lashes, or extensive.
A broader range of conditions can trigger eyelash poliosis as well. These include congenital and genetic disorders like Waardenburg syndrome, piebaldism, and tuberous sclerosis, along with autoimmune and inflammatory conditions such as alopecia areata and Vogt-Koyanagi-Harada disease.11PubMed Central. Leukotrichia: A comprehensive review of follicular depigmentation In one reported case, a 39-year-old man developed poliosis of his lower eyelashes that started with a few central lashes and then spread to neighboring ones within just two weeks. The underlying cause turned out to be a halo nevus, a type of mole surrounded by a ring of depigmented skin.12PubMed Central. Poliosis of eyelashes as an unusual sign of a halo nevus
The speed of onset is one useful way to distinguish medical poliosis from normal aging. If your eyelashes are gradually turning gray in your 60s or 70s, that is almost certainly the expected biological process. If you are younger and patches of white lashes appear over days or weeks, that warrants medical evaluation. It does not always signal something serious, but it can be the first visible sign of an underlying autoimmune or inflammatory condition.
Medications That Change Eyelash Color
Some medications can shift eyelash color in either direction. Prostaglandin analogs, a class of eye drops prescribed for glaucoma, are well documented to darken eyelashes and make them grow longer and thicker. This effect was first noticed as a side effect during clinical trials and eventually led to the development of bimatoprost (sold cosmetically as Latisse) specifically for eyelash enhancement.13Survey of Ophthalmology. Side Effects Associated with Prostaglandin Analog Therapy Eyelash changes, including increased pigmentation and bristliness, are among the most frequent side effects reported with bimatoprost and travoprost.14PubMed Central. Adverse periocular reactions to five types of prostaglandin analogs These drugs share a broadly similar side-effect profile that includes eyelash changes, iris darkening, and skin pigmentation around the eyes.15PubMed. The side effects of the prostaglandin analogues
Going the other direction, some systemic medications can lighten or gray hair, including body hair. Hair color changes from drugs are considered uncommon side effects overall, and they can involve lightening, darkening, or a complete color shift affecting the scalp and other body hair.16PubMed Central. Drug-induced hair colour changes The growing use of targeted therapies in oncology and other fields is expected to make observations of these side effects more frequent. If you notice unexpected lash color changes while on a new medication, it is worth mentioning to your prescriber, even if it is not listed prominently in the drug’s side-effect profile.
Can Chemical Exposure Trigger Eyelash Whitening?
Beyond age and medical conditions, direct chemical injury to the eyelid area can sometimes cause poliosis. In one documented case, a patient developed eyelash color loss roughly two weeks after a temporary eyelash tinting procedure. By eight months, about 80% of the lashes were depigmented.17PubMed Central. Poliosis as a result of temporary eyelash tinting This is an unusual outcome, but it underscores that the melanocytes in lash follicles can be damaged by harsh chemicals applied directly to the area. It is a different mechanism from age-related graying; instead of a slow oxidative decline, it involves acute injury to pigment cells that can result in sudden, potentially permanent depigmentation.
This matters because the cosmetic market for eyelash tinting and dyeing is substantial, and people sometimes treat these procedures as low-risk. But the eyelid skin is thin and highly sensitive. Chemical reactions in that area can cause allergic contact dermatitis, conjunctivitis, and in rarer cases, lasting changes to lash pigmentation. One review reported that about 60% of people who underwent eyelash dyeing experienced allergic contact dermatitis as the most common adverse effect.18PubMed Central. Eyelid Cosmetic Enhancements and Their Associated Ocular Adverse Effects Para-phenylenediamine, a common ingredient in permanent hair and lash dyes, is a known allergen that has caused severe eyelid and periorbital dermatitis in sensitized individuals.19PubMed. Contact allergy to para-phenylenediamine in a permanent eyelash dye
Covering Gray Eyelashes
If your eyelashes have gone gray and you want to restore their appearance, the options are more limited than they are for scalp hair. Mascara is the most common and safest approach. It is temporary, easy to control, and washes off. For people with a few scattered gray lashes, tinted mascara may be all that is needed.
Eyelash dyeing offers a more lasting result, and it has been specifically studied as a cosmetic intervention for poliosis in vitiligo patients, where it addresses both the visible whitening and the psychological distress that can accompany periorbital depigmentation.10PubMed Central. Eyelash Dyeing for Poliosis of Eyelashes in Patients With Vitiligo However, the safety concerns discussed above apply here as well. Allergic reactions are common, and the proximity of dye chemicals to the eyes creates risks that do not exist when dyeing scalp hair. Patch testing before a full application is recommended, and people with a history of contact allergy or atopic skin should be especially cautious.
For glaucoma patients already using prostaglandin analog eye drops, the darkening of eyelashes may be an unintended but welcome cosmetic benefit. If one eye is being treated and the other is not, though, the asymmetric darkening can be noticeable and cosmetically bothersome, which is an ironic twist on the gray-lash problem.
The Emotional Side of Losing Eyelash Color
Eyelash graying gets less cultural attention than scalp graying, partly because lashes are small and partly because mascara makes it easy to conceal. But for people who experience sudden poliosis, especially at a younger age, the impact can be significant. Clinicians have specifically noted that eyelash poliosis can affect quality of life, causing emotional distress and lowered self-esteem.17PubMed Central. Poliosis as a result of temporary eyelash tinting This is especially true when poliosis is part of a broader visible condition like vitiligo, where the loss of lash color combines with skin depigmentation around the eyes to create a highly visible change in appearance.
Eyelashes play a larger role in facial expressiveness than people tend to realize. They frame the eye, contribute to perceived depth of gaze, and are one of the features the human brain processes rapidly during face perception. When they change color dramatically, particularly to white against dark skin, the contrast draws attention in a way that a few gray hairs on the scalp would not. This helps explain why even a relatively minor anatomical change can feel disproportionately distressing, and why researchers have taken the step of formally evaluating cosmetic dyeing as a therapeutic intervention rather than treating it as a purely vanity concern.
Why Eyelash Biology Remains Understudied
Given how visible and cosmetically significant eyelashes are, it is surprising how little direct research has been done on their biology. One reason is practical: eyelash hair follicles are extremely difficult to obtain for laboratory study. They sit in a delicate and functionally important part of the body, and extracting them for research is far more complex than taking scalp samples. Researchers have explicitly pointed to this “extremely restricted availability” as a barrier to understanding eyelash biology, alongside what they describe as an “underappreciation” of the eyelash follicle’s distinct sensory and protective functions.1PubMed. Biology of the eyelash hair follicle: an enigma in plain sight
This knowledge gap means that some of the most interesting questions about eyelash graying remain unanswered. We know that TRP-2 expression in lash follicles correlates with delayed graying, but whether it is the direct cause or a marker of some other protective mechanism is still uncertain. We know that eyelash follicles have a different growth cycle and different structural features than scalp follicles, but how those differences interact with the oxidative stress pathways that drive graying has not been thoroughly mapped. And we do not have good population-level data on the full progression of eyelash graying, because the forensic study cited earlier was designed to test whether lash whitening could help estimate someone’s age, not to track the natural history of lash color change. The field is, as one group of researchers put it, “an enigma in plain sight.”