Stevia And Hair Loss. What The Sweetener Study Really Shows

14 Oct

Recent headlines suggest a common sweetener could transform hair loss treatment. The research behind them used stevioside, the sweet compound in the stevia plant, to dissolve minoxidil far better and deliver it through a dissolving microneedle patch. In mice, the patch grew much more hair than ordinary minoxidil solution. It has not been tested in people, and eating stevia or adding it to your minoxidil will not help your hair. Treatments that already work in people, including minoxidil, PRP and combinations of the two, remain the place to start.

Key points

The study, published in Advanced Healthcare Materials by researchers in China and at the University of Sydney, used stevioside to make minoxidil about 18 times more soluble in water and loaded it into a dissolving microneedle patch.
In mice with testosterone-induced hair loss, the patch regrew hair over 67.5 percent of the treated area by day 35, against 25.7 percent with a standard 2 percent minoxidil solution. There were only 6 mice per group.
There are no human trials of the patch. Eating stevia, or mixing it into minoxidil at home, has no evidence of benefit.
At The London PRP Clinic by The Wellness, a hair consultation with trichoscopy is from £300, and a course of 3 PRP sessions is from £1,200.

Want treatment that works in people today? Message our doctors on WhatsApp or email team@thewellnesslondon.com.

What the researchers did

The problem they set out to solve

Minoxidil is one of the most widely used hair loss treatments, but it dissolves poorly in water. That is why topical minoxidil is made up in alcohol and propylene glycol, which some people find irritating, and why only part of each dose reaches the follicles.

The solution they tested

Stevioside molecules naturally cluster into tiny spheres in water. The researchers found these spheres could hold minoxidil, raising how much dissolves by about 18 times. They then built a patch of tiny, dissolving needles from the stevioside and minoxidil mixture. Pressed onto the skin, the needles dissolve and release the medicine into the upper layers of the scalp.

What they found

In mice with hair loss induced by testosterone, the stevioside minoxidil patch produced visible regrowth by day 14. By day 35, new hair covered 67.5 percent of the treated area, compared with 25.7 percent with a standard 2 percent minoxidil solution. A patch made of stevioside alone did little, showing the effect came from delivering minoxidil better rather than from the sweetener itself. In pig skin, the patch kept a higher proportion of its dose in the skin than the solution, although the absolute amounts were not significantly different.

What it does not show

It has not been tested in people

Mouse hair grows in a very different way from human scalp hair, and many treatments that work in mice do not work in people. Only 6 mice were in each group. Whether the patch is comfortable, safe with repeated use and effective on the human scalp is unknown.

Eating stevia will not grow hair

The effect came from a carefully engineered patch that delivers minoxidil into the skin. There is no evidence that eating stevia or adding it to minoxidil at home helps hair.

It is years from a clinic

If human trials go well, a product would still need regulatory approval before it reached patients. That process usually takes years.

Want to know what works for your hair now? Ask our doctors on WhatsApp.

Another 2026 study worth knowing about

A randomised trial of 245 women with female pattern hair loss, published in the Journal of the American Academy of Dermatology in 2026, compared 2 percent minoxidil alone with 2 percent minoxidil plus microneedling at different frequencies. Adding microneedling gave no statistically significant extra benefit. That sits alongside earlier trials in men, where microneedling with 5 percent minoxidil gave much more regrowth than minoxidil alone. The lesson is that how a treatment is delivered, the strength used and who receives it all matter, and that a plan should be built around the individual rather than a headline. Our guides are microneedling for hair loss and combination hair treatment.

What works for hair loss today

Minoxidil

Topical minoxidil is licensed for male and female pattern hair loss in the UK. Low-dose oral minoxidil, prescribed off-label after assessment, avoids the solubility problem altogether because it is taken by mouth. See oral minoxidil and the minoxidil shedding phase.

PRP

A 2025 meta-analysis of 43 randomised trials and 1,877 participants found PRP increases hair density in pattern hair loss, and a 2024 meta-analysis found higher hair density with PRP plus minoxidil than with minoxidil alone. Across our hair restoration work, we report a 32 percent average density increase at 6 months. See PRP vs minoxidil.

Diagnosis first

Low ferritin, thyroid problems, vitamin D deficiency and scarring alopecias all cause hair loss that minoxidil and PRP will not fix on their own. A scalp examination with trichoscopy and a blood panel come first. Other newer treatments, such as clascoterone and PP405, are covered in new hair loss treatments 2026.

What it costs

Flagship Harley Street and Mayfair clinics commonly charge £600 to £850 or more per PRP session.

At The London PRP Clinic by The Wellness, there are 3 ways to begin.

A hair consultation with full scalp examination and trichoscopy is from £300, included at the first session when you choose a course.

A single PRP session is from £450.

A course of 3 sessions is from £1,200, as explained in PRP hair package London.

Ask what your plan would cost. Message us on WhatsApp.

Why people choose The London PRP Clinic by The Wellness

Every treatment is performed by a GMC-registered doctor, and no clinician treats a patient here until they have completed 100 supervised treatments. We read the new research as it is published and explain plainly what it does and does not mean for you, and every plan begins with trichoscopy and a full blood panel. We see patients at 10 Portman Square in Marylebone and the Light Centre in Belgravia. Across our work we report an 87 percent patient success rate and more than 187 five-star reviews. The evidence across treatments is in PRP success rates.

Book your hair consultation. Message us on WhatsApp, email team@thewellnesslondon.com, or call +44 20 3951 3429.

Frequently asked questions about stevia and hair loss

Does stevia help hair loss?

Not on its own. The study used stevioside, from stevia, to help dissolve and deliver minoxidil through a microneedle patch in mice. A stevioside-only patch did little, and eating stevia has no evidence of benefit.

What did the stevia minoxidil patch study find?

In mice, the patch regrew hair over 67.5 percent of the treated area by day 35, against 25.7 percent with a standard 2 percent minoxidil solution.

Has the stevia patch been tested in humans?

No. There are no human trials yet, and any product would need trials and approval before reaching clinics.

Can I add stevia to my minoxidil?

No. There is no evidence this helps, and changing the formulation yourself could irritate the scalp.

Does microneedling with minoxidil work for women?

A 2026 trial of 245 women found no significant extra benefit from adding microneedling to 2 percent minoxidil, while earlier trials in men with 5 percent minoxidil showed clear benefit.

What is the best hair loss treatment available now?

For pattern hair loss, minoxidil and PRP, often combined, after a diagnosis that rules out deficiencies and other causes.

This article is for information and does not replace personal medical advice. All treatments at The London PRP Clinic by The Wellness are performed by GMC-registered doctors. Reviewed by a GMC-registered doctor at The London PRP Clinic by The Wellness. Last updated October 2026.

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