The next generation of anti-aging: Is it possible to slow down hair aging?

We invest quite a bit in trying to slow down the signs of aging in the skin, but in recent years it has become clear that hair also undergoes its own complex biological aging process. Beyond the gray hair that appears with the years, hair aging can manifest as a decrease in density and thickness, a change in the quality of the hair shaft, and a gradual weakening of hair follicle function. Now a relatively new field of research, known as Hair Longevity, is trying to change the perspective: instead of waiting for the hair to thin and only then treating it, try to keep the follicles, scalp, and hair shafts healthy and functioning over time. According to Dr. Osnat Raziel, director of the multidisciplinary center at Assuta Medical (Assuta Ramat HaHayal), the idea fits into the broader longevity trend, which deals not only with extending life but with preserving function and quality of life over the years.

Hair also ages

An international expert consensus published this year defines hair aging as a process that includes quantitative and qualitative changes: loss of pigment and graying, miniaturization of hair follicles, and a decrease in the quality of the hair shaft. Experts point, among other things, to changes in stem cells, oxidative stress, inflammatory processes, and cellular aging as mechanisms that may be involved in the process. External factors also accumulate over the years. Solar radiation, heat, dyes, lighteners, and chemical treatments can damage the hair shaft. Unlike living tissues, a hair shaft that has already emerged from the scalp is not capable of fully repairing itself, so damage can accumulate over time.

What is Hair Longevity anyway?

The new approach asks a simple question: instead of treating hair only after it has already thinned, is it possible to preserve in advance the biological environment that allows it to grow? A review published based on an analysis of 102 articles describes Hair Longevity as a shift from a reactive approach to hair loss to an approach aimed at proactively preserving the health of hair follicles. The model treats hair aging as a multi-factorial process influenced by, among other things, genetics, inflammation, oxidative stress, and cellular aging. But caution is also required here: this is still an evolving scientific framework. There is currently no treatment capable of causing hair follicles to "stay young" permanently or stop the aging process.

Hair is a system that regenerates again and again

The hair follicle is a dynamic biological structure that goes through repeated cycles of growth, regression, and rest throughout life. The growth phase, Anagen, can last for years. It is followed by a shorter regression phase, Catagen, and then the rest phase, Telogen, at the end of which the hair may fall out and a new cycle can begin. Stem cells in the follicle play a central role in this regenerative ability. Studies indicate that with age, changes occur in the activity of stem cells and in the environment in which they are located, which may contribute to a decrease in the follicle's regenerative ability.

The scalp is also part of the story

One of the interesting changes in the approach is the shift from focusing on the hair itself to the environment in which it is created. The hair follicle is located inside the skin and is influenced by the biological environment of the scalp. Studies indicate a close connection between skin aging processes and hair follicle aging, including pathways related to inflammation, oxidative stress, and stem cell function. Maintaining a healthy scalp does not guarantee the growth of new hair, but treating diseases and conditions such as inflammation, dandruff, or damage to the skin barrier can be part of maintaining the scalp environment.

Can antioxidants help?

Oxidative stress — a state in which an imbalance is created between free radicals and the body's ability to deal with them — is considered one of the most studied mechanisms in hair follicle aging. A randomized, double-blind, placebo-controlled study that lasted 24 weeks found that a scalp treatment regimen that included antioxidant components and skin barrier supporters was associated with reduced hair loss and improvement in scalp condition indices compared to the control treatment. However, the study does not prove that every shampoo or serum on which the word "antioxidants" appears will prevent aging or hair loss. The effect depends on the materials, the concentration, and the specific formulation tested.

Dietary supplements? Only when really needed

Nutrition plays a role in hair health, but more supplements are not necessarily better. A deficiency in iron, zinc, biotin, or protein may affect hair in some people. However, the American Academy of Dermatology recommends taking supplements like iron, zinc, or biotin when tests find a deficiency and not automatically for everyone who suffers from hair loss. Taking excessive amounts of certain components can even be harmful. Therefore, significant hair loss is not necessarily a reason to buy a "hair" supplement. First, you need to find out why it is happening.

And what can actually grow hair?

Here it is important to separate care aimed at maintaining hair quality from medical treatment for hair loss. In the current expert consensus on hair aging, minoxidil was the only drug treatment that received consensus support in the context of hair aging, while new treatments aimed directly at aging mechanisms still require further research.

Minoxidil has been used for years to treat certain types of hair loss. In androgenetic alopecia, there are also other treatments, and the choice among them depends, among other things, on the diagnosis, gender, age, background diseases, and the patient's condition. Low-dose oral minoxidil has also received much interest in recent years, but its use for hair loss is off-label and requires medical adjustment; an international consensus published in JAMA Dermatology dealt, among other things, with the indications, precautions, and monitoring required in its use.

Sleep, stress, and lifestyle

The Hair Longevity approach tries to look beyond the hair itself. Diseases, hormonal changes, medications, nutritional deficiencies, and significant physiological stress can affect the hair growth cycle. However, it is important to avoid over-promising: good sleep, a balanced diet, and physical activity are part of good general health, but are not a proven treatment for baldness and cannot reverse a genetic tendency for hair loss. The way we treat our hair also has meaning. Reducing unnecessary heat, aggressive chemical treatments, and chronic pulling of the hair may reduce damage and breakage of existing hair shafts.

When does hair loss require a check?

Not every change in hair is a natural part of age. Sudden hair loss, significant or rapid thinning, bald patches, pain, inflammation, or unusual itching of the scalp justify a medical investigation. Hair loss can be caused by androgenetic alopecia, autoimmune diseases, hormonal disorders, nutritional deficiencies, medications, acute illness, or other factors. In such cases, the diagnosis is much more important than the new serum that promises "anti-aging" for hair.

So is it really possible to slow down hair aging?

The scientific answer today is: to some extent, it is possible to preserve hair health and reduce damage — but it is still impossible to stop its aging process. It is impossible to reverse genetics or completely prevent graying and thinning associated with age. It is possible to reduce cumulative damage to the hair shaft, treat scalp problems, identify deficiencies and diseases that affect hair, and offer evidence-based medical treatment when hair loss exists. Perhaps the most important innovation of Hair Longevity is therefore not a new product, but a change in perception: not to wait until the hair has thinned to start thinking about it, but to treat the health of the scalp, follicles, and hair as part of health throughout life. And just like in the entire longevity world, here too it is worth distinguishing between science that is advancing rapidly and an industry that is sometimes in a hurry to use the word "longevity" even before the evidence has arrived.