Alphafill: Scientific State of Research

Penis Enlargement with Hyaluronic Acid – What Does Science Say?

Penis enlargement with hyaluronic acid is today one of the best-studied non-surgical methods for increasing penile girth. Numerous scientific studies have investigated in recent years just how effective and safe this treatment actually is.¹

How Does Penis Enlargement with Hyaluronic Acid Work?

During the treatment, specially prepared hyaluronic acid is introduced under the skin of the penis. This immediately creates more volume and therefore a larger girth. Since hyaluronic acid is a substance that occurs naturally in the human body, it has been used successfully in aesthetic medicine for many years.

Which Results Are Scientifically Proven?

The currently available studies consistently show that a visible increase in girth can be achieved with hyaluronic acid. In the published investigations, average girth gains of between approximately 1.5 and 4 cm were described.²⁻⁶

In a randomized study by Yang and colleagues, an average increase in girth of 2.65 cm was measured after four weeks. After 48 weeks, the gain was still an average of 1.7 cm.²

Another controlled study by Ahn et al. showed an average increase in girth of 2.27 cm after six months.³

Larger observational studies also came to similar results. Kwak et al. reported an increase in girth of nearly 4 cm after one month, which was largely maintained even after 18 months.⁴

In addition to the increase in girth, many patients report an improved sense of their body and more self-confidence.

How Satisfied Are the Patients?

Patient satisfaction is described as high in almost all published studies.²⁻⁶

In one of the largest investigations to date, with nearly 100 evaluated patients, 74% of the men reported high or at least moderate satisfaction with the treatment result.⁶

It is important to understand here that treatment success does not depend on centimeters alone. Many patients report a clear improvement in their self-esteem and their satisfaction with their own body image even with moderate changes in girth.⁷

What Risks Are There?

Overall, the scientific data show a favorable safety profile. Serious complications have been described only very rarely.²⁻⁶

The most common side effects include:

• Temporary swelling

• Bruising

• Tenderness to pressure

• Small palpable nodules

• Temporary asymmetries

These symptoms are usually mild and generally resolve completely within a few days or weeks.²⁻⁶

A particular advantage of hyaluronic acid is that it can be dissolved again if necessary using the enzyme hyaluronidase.

How Good Is the Scientific Data?

The current scientific evidence clearly supports the view that hyaluronic acid injections can lead to a reliable increase in girth with high patient satisfaction.¹

AlphaFill® – Penis Enlargement with Hyaluronic Acid at the Praxisklinik am Rosengarten

The scientific studies show that hyaluronic acid can be a safe and effective option for non-surgical penis enlargement. However, decisive for a natural and harmonious result is not only the material used, but above all the experience of the treating physician and the correct injection technique.

The Praxisklinik am Rosengarten is one of the first clinics in Europe to offer penis enlargement with hyaluronic acid. For more than ten years we have been intensively engaged with this treatment method and have successfully treated a large number of patients during this time. This many years of experience enable us to tailor the treatment individually to the anatomy and wishes of each individual patient.

With our specially developed treatment concept AlphaFill® we rely on high-quality, cross-linked hyaluronic acid products, modern injection techniques and an individually tailored treatment concept. The goal is a uniform, natural increase in girth with an aesthetically harmonious result and the highest possible patient satisfaction.

Our many years of experience show that, in addition to the actual treatment, in particular a detailed consultation, careful planning and structured aftercare are decisive for an optimal result. That is why we personally accompany our patients from the first consultation to complete healing and are also available as a point of contact at any time after the treatment.

The high satisfaction of our patients as well as our specialization in male intimate surgery have made the Praxisklinik am Rosengarten one of the leading addresses for penis enlargement with hyaluronic acid in German-speaking countries.

Conclusion

According to the current state of scientific knowledge, penis enlargement with hyaluronic acid represents one of the best-studied and safest non-surgical methods for penis enlargement. Most patients achieve a visible increase in girth while at the same time experiencing high satisfaction and a low risk of serious complications.²⁻⁶

As with any aesthetic treatment, however, individual results depend on the starting situation, the technique used and, in particular, the experience of the treating physician.

References

¹ Mubarak M, Kumar V, Manjunath A et al. Penile augmentation: current evidence and outcomes. Journal of Clinical Urology, 2025.

² Yang DY, Jeong HC, Ahn ST et al. A comparison between hyaluronic acid and polylactic acid filler injections for temporary penile augmentation in patients with small penis syndrome. Journal of Sexual Medicine. 2020;17(1):133–141.

³ Ahn ST, Shim JS, Bae WJ et al. Efficacy and safety of penile girth enhancement using hyaluronic acid filler. World Journal of Men's Health. 2022;40(2):299–307.

⁴ Kwak TI, Oh M, Kim JJ et al. The effects of penile girth enhancement using injectable hyaluronic acid gel. Journal of Sexual Medicine. 2011;8(12):3407–3413.

⁵ Zhang CL, Quan Y, Li H et al. Penile augmentation with injectable hyaluronic acid gel: An alternative choice for small penis syndrome. Asian Journal of Andrology. 2022;24(6):601–606.

⁶ Kim DW, Jeong HC, Ko K et al. Which dermal filler is better for penile augmentation for aesthetic purposes? World Journal of Men's Health. 2024;43(2).

⁷ Herbenick D, Schick V, Reece M et al. The development and validation of the male genital self-image scale. Journal of Sexual Medicine. 2013;10(6):1516–1525.

Scientifically Reviewed

The information in this article is based on a current systematic review by international scientists who evaluated the literature available worldwide on penis enlargement and penis girth enhancement. Both randomized studies and long-term observations on the use of hyaluronic acid for penis girth enhancement were taken into account.

Main source:

Mubarak M, Kumar V, Manjunath A et al. Penile augmentation: A systematic review of surgical and non-surgical techniques, outcomes and complications. Journal of Clinical Urology. 2025.

In addition, the original studies on hyaluronic acid injections for penis girth enhancement listed in the reference list were taken into account, including the works by Yang et al. (2020), Ahn et al. (2022), Kwak et al. (2011), Zhang et al. (2022) and Kim et al. (2024).

Status of the scientific evaluation: June 2026.