Polygonum multiflorum May Offer Hope for Androgenetic Alopecia

Androgenetic alopecia (AGA) is the most widespread form of hair loss, affecting millions of men and women globally. Also referred to as male-pattern or female-pattern baldness, it typically develops gradually as hair follicles shrink over time. As the follicles become smaller, they produce shorter, finer hairs, until growth may slow substantially or stop altogether.

Current treatments, including finasteride and minoxidil, can be helpful for some people, but they are not suitable for everyone. Finasteride works by targeting hormones involved in hair-follicle shrinkage, while minoxidil is commonly applied to the scalp to encourage growth. However, some patients are concerned about unwanted effects, including sexual side effects associated with finasteride and scalp irritation linked to minoxidil. As a result, many people continue to seek options that are safer, more natural or more comprehensive.

Ancient roots meet modern hair science

A new scientific review indicates that Polygonum multiflorum, a root long used in traditional Chinese medicine, may warrant particular attention as a potential treatment for androgenetic alopecia. The herb has been used for more than a thousand years and has traditionally been associated with “darkening the hair and nourishing the essence”.

What makes the review especially notable is that the plant does not appear to work through just one biological pathway. Instead, researchers report that Polygonum multiflorum may affect several processes involved in hair loss and hair growth at the same time.

In androgenetic alopecia, a hormone called dihydrotestosterone plays a central role. It can progressively shrink hair follicles, making it harder for them to produce strong, healthy hair. According to the review, Polygonum multiflorum may help lessen the effect of this hormone, shielding follicles from one of the main drivers of pattern hair loss.

A multifaceted approach to hair growth

The review also outlines several other potential benefits. Polygonum multiflorum may help prevent premature follicle-cell death, which matters because healthy follicles rely on living, active cells to maintain the hair-growth cycle. It may also activate key biological signals involved in regeneration, including the Wnt and Shh pathways.

These pathways matter because they help regulate how cells grow, communicate and repair tissue. Within hair follicles, they are closely associated with the shift from resting phases to active growth. When these signals are stronger, follicles are more likely to return to a growth state.

The herb may also improve blood flow to the scalp. Better circulation could help deliver oxygen and nutrients to follicles, creating the conditions needed for healthier hair growth. This is one reason researchers view Polygonum multiflorum as potentially more comprehensive than conventional treatments focused on a single target.

“Our analysis bridges ancestral wisdom and modern science,” said Han Bixian, first author of a recently published review on the subject in the Journal of Holistic Integrative Pharmacy. “What surprised us was how consistently historical texts - dating back to the Tang Dynasty - described effects that align perfectly with current understanding of hair biology. Modern studies now confirm this is not folklore; it is pharmacology.”

From traditional records to laboratory evidence

The review brings together several forms of evidence, including laboratory research, clinical reports and historical herbal records. These older records are not being treated as proof in themselves. Instead, researchers are comparing traditional claims with modern biological findings to identify areas of overlap.

This overlap appears to be one of the main reasons behind renewed interest in Polygonum multiflorum. The review suggests that the herb may do more than simply slow hair loss. By acting on growth factors and signalling pathways, it could help establish conditions that support regeneration.

This distinction is important. Many hair-loss treatments are designed chiefly to preserve existing hair or slow thinning. A treatment that actively promotes growth through multiple mechanisms could offer a different approach, particularly for people who have not responded well to existing options.

Safety depends on proper preparation

The review also stresses the importance of preparation. In traditional Chinese medicine, Polygonum multiflorum is usually processed before use. This step is considered significant because processing can affect both safety and biological activity.

“When properly processed - a critical step in traditional preparation - the herb demonstrates a favourable safety profile, making it more acceptable for patients wary of side effects such as sexual dysfunction or scalp irritation associated with current drugs,” the article notes.

This point is especially relevant because natural products are not automatically risk-free. Herbs can contain potent compounds, and their effects may differ according to preparation, dose and product quality. The review presents processed Polygonum multiflorum as a more acceptable option for some patients, but it does not suggest that people should self-medicate without professional guidance.

Further clinical testing is still needed

Although the findings are encouraging, the researchers emphasise that stronger clinical evidence is still required. Much of the current support comes from laboratory studies, historical records and limited clinical observations. Large, carefully designed human clinical trials would be needed to confirm the effectiveness of Polygonum multiflorum in treating androgenetic alopecia, as well as its safety across different patient groups.

Even so, the review points to a broader idea of growing scientific importance. Traditional remedies may contain biologically active compounds capable of inspiring new treatments when investigated using modern methods. In the case of Polygonum multiflorum, centuries of use are now being examined through the lens of hormonal biology, cell survival, growth signalling and scalp blood circulation.

For people experiencing hair loss, the research delivers a hopeful but cautious message. A root used for more than a millennium may not replace current treatments yet, but it could help shape the next generation of hair-growth therapies.