Without my hair, I wasn't me.
In laboratories in Japan, scientists have identified a previously unknown cell type that may hold the key to regenerating hair follicles capable of natural, repeating growth cycles — a discovery that carries weight far beyond cosmetics. Hair loss, whether from chemotherapy, alopecia, or aging, touches something deeper than appearance: it reaches into identity, dignity, and the quiet architecture of selfhood. For the roughly one-third of women and countless others who experience it, this research represents not merely a medical advance, but a potential restoration of something profoundly human.
- A Japanese research team has achieved what scientists have long failed to accomplish — lab conditions that produce fully cycling hair follicles in mice, meaning hair that grows, sheds, and regrows naturally.
- The breakthrough hinges on a newly identified third cell type, a hair follicle regenerative-supporting cell, whose existence had been overlooked and whose absence had stalled progress for years.
- The emotional stakes are enormous: for cancer patients, hair loss is often experienced as more devastating than other physical changes, stripping away identity and signaling illness to the world in ways that feel impossible to control.
- Research into hair loss has long been underfunded and skewed toward male pattern baldness, leaving female hair loss — which may operate through entirely different biological mechanisms — poorly understood.
- Translating mouse-based findings to human treatment remains a formidable challenge, but the lead researcher believes this discovery places the field meaningfully closer to a real solution.
Victoria Derbyshire remembers the precise moment — a hotel bathroom, seventeen days into chemotherapy — when long strands of hair began circling the drain despite her use of a cold cap. What devastated her was not the physical change alone, but what it meant: losing her hair felt worse than losing a breast. It was, she realized, woven into her sense of self in ways she had never needed to articulate before it was gone.
Hers is a widely shared experience. Hair loss affects roughly one-third of women at some point, yet its emotional weight is routinely dismissed as vanity. Those who have lived it describe it differently — as the loss of identity, culture, and the feeling of being in control. Natasha Anderson, a school nurse, asked her brother to shave her head before chemotherapy could take it, choosing the moment rather than enduring it. Psychiatrist Sylvia Karasu explains that hair marks the stages of life, signals gender, race, and religion, and has been used across history as both a symbol of power and a tool of dehumanization.
Now, a team led by Professor Takashi Tsuji in Japan has announced what they call a major breakthrough: the recreation of fully cycling hair follicles in mice — follicles that grow, shed, and regrow repeatedly, as natural hair does. The key was the identification of a previously unknown third cell type, a hair follicle regenerative-supporting cell, that appears to complete a biological picture scientists had long considered incomplete. Prior to this, lab-grown follicles could only partially form and could not replicate the natural growth cycle.
The field has faced additional obstacles. Much hair loss research has focused on male pattern baldness, partly because men seek transplants more often, making scalp tissue more accessible. When German researchers recently studied the genetics of female hair loss expecting overlap with male findings, they found none — suggesting the two conditions may be driven by entirely different mechanisms, neither of which is yet fully understood.
Translating these mouse-based findings to human treatment will be difficult; human hair growth is considerably more complex. But Tsuji expressed measured optimism: "We believe we are now much closer than before." For people like Derbyshire — who wept in a wig salon while clumps of hair came away in a stylist's hands — that closeness is not a small thing. Hair is never only hair. It is the quiet, daily evidence of who we are.
Victoria Derbyshire remembers the exact moment her hair began to disappear. She was in a hotel bathroom on a Saturday evening, seventeen days into chemotherapy for breast cancer, washing her hair before heading to a friend's fortieth birthday party. She had worn a cold cap during treatment—the freezing helmet designed to preserve hair—and had begun to believe she might be among the lucky ones who escaped this particular side effect. But as water streamed over her head, long strands of brown hair coalesced around the drain. There was nothing she could do to stop it.
What struck her most was not the physical loss itself, but what it meant. Losing her hair felt worse than losing a breast. Without her hair, she was not herself. She had not understood, until it began falling out, that her hair was woven into her identity in ways she could not have articulated before the moment it was gone. Between fifty and seventy-five percent of her hair fell out during treatment. She sat in a wig salon in Richmond while the owner gently brushed through tangled clumps that came away in her hands, and she cried.
Now, scientists in Japan believe they may have found a way to change this reality for millions of people. A team led by Professor Takashi Tsuji announced what they are calling a major breakthrough: they have recreated the full cycle of hair growth in mice, meaning hair could grow, fall out, and grow back again naturally, repeatedly, the way hair behaves in the body. While transplanted hair can already grow, recreating follicles that cycle through growth and shedding as natural hair does has proved far more difficult. The team identified what they describe as a novel third cell type—a hair follicle regenerative-supporting cell—that appears to be the missing piece scientists have been searching for. This cell could bring researchers significantly closer to the possibility of growing hair in a laboratory.
Hair loss affects roughly one-third of women at some point in their lives, yet the emotional weight of losing it is often dismissed as vanity. Nicky Elkington, a hairdresser who underwent chemotherapy, told Derbyshire it was nothing to do with vanity. "It's your identity," she said, "and I didn't want to look like I had cancer." Natasha Anderson, a school nurse and mother of two, had loved experimenting with her hair growing up—wearing an afro one week, extensions the next. "It wasn't just hair," she said. "It was my culture." When facing chemotherapy, she asked her brother to shave her head before it fell out on its own. She felt liberated by taking control of the situation, by choosing rather than enduring.
Psychiatrist Sylvia Karasu explains that hair shapes identity in biological, physiological, and social ways. It marks the stages of our lives. It signals gender, race, and religion. Across history, hair has carried profound meaning: Egyptian pharaohs wore embellished wigs to display power; medieval women's long hair became synonymous with femininity; seventeenth-century men wore elaborate periwig to denote wealth and status. The forcible removal of hair has been used as a tool of dehumanization—in concentration camps, in post-liberation France, where thousands of women accused of collaboration had their heads shaved publicly as punishment. Hair is linked to dignity itself.
Yet research into hair loss has struggled for funding and attention, particularly regarding women. Claire Higgins, a professor of tissue engineering at Imperial College London, notes that much of the work has focused on male pattern baldness, partly because men are more likely to seek hair transplants, making scalp samples easier for scientists to access. Large genetic studies on male hair loss identified several genes linked to the condition, but all were conducted on men. When researchers in Germany recently investigated the genetics of female pattern hair loss, they expected to find overlap. They found none. Male and female hair loss may be caused by entirely different mechanisms, yet scientists still do not fully understand what those mechanisms are.
Tsuji's work matters because it represents a genuine shift in understanding. For years, scientists believed two cell types were responsible for hair growth: epithelial stem cells that create the follicle, and dermal papilla cells that signal when hair should grow. But these cells cannot grow hair in a laboratory—only when transplanted into skin and connected with underlying tissue. Tsuji's team identified a third cell type that appears to support the entire process. Previous research had only managed to create partial hair follicles in the lab. No one had achieved fully cycling follicles before—follicles that repeatedly grow, shed, and regrow the way natural hair does. The study was conducted on mice, mostly using cells from their whiskers. Translating these findings to human treatment remains difficult because human hair growth is far more complex. Still, Tsuji expressed hope: "We believe we are now much closer than before."
Derbyshire's wig, made from real hair donated or sold by women, looked so much like her own that seeing it for the first time felt surreal. Her emotions swung between tears and elation—it would allow her to continue presenting her daily television news programme without distraction. But hair loss through illness is not something anyone would choose. It is imposed. And that is why it was so hard to come to terms with. Hair is never really just hair. For many people, it is identity, privacy, a way of feeling in control and confident. That is why it matters so much.
Citas Notables
It's your identity, and I didn't want to look like I had cancer.— Nicky Elkington, hairdresser undergoing chemotherapy
It wasn't just hair. It was my culture.— Natasha Anderson, school nurse and mother of two
La Conversación del Hearth Otra perspectiva de la historia
Why did losing your hair feel worse than losing a breast?
Because a breast is a part of your body you can hide. Your hair is what people see first. It's how you present yourself to the world. Without it, I didn't recognize myself.
But isn't that about vanity?
No. It's about identity. When people said "it's only hair," they were missing the point entirely. Hair is how we signal who we are—our culture, our confidence, our control over our own image.
Why has research into female hair loss been so neglected?
Because the science followed the money, and the money followed men. Men get transplants more often, so scientists had easier access to male scalp samples. Women's hair loss was treated as the same problem, when it turns out it might be caused by something completely different.
What does Tsuji's discovery actually change?
For the first time, scientists grew hair follicles in a lab that behaved like real hair—growing, shedding, regrowing. Before, they could only make partial follicles. It's a proof of concept that lab-grown hair might one day be possible.
How far away is a treatment for people?
Still years away. The work was done on mice. Human hair is far more complex. But for the first time, researchers feel like they're not chasing something impossible.