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š What does penile traction therapy actually deliver in clinician-measured before and after results? We walk through the pooled data from over a thousand patients across 12 peer-reviewed studies.
š Full guide: https://sizegenetics.com/en-ie/blogs/
This episode examines what clinician-measured before and after data actually shows for penile traction therapy. We review pooled findings from over 1,000 patients across 12 peer-reviewed studies, including a landmark randomized controlled trial.
Sustained mechanical tension applied over months encourages cellular proliferation and tissue expansion in the tunica albuginea and corporal structures, producing measurable changes documented under standardized clinical protocols.
FDA-registered Class II medical device, manufactured by Danamedic ApS in Denmark since 1994. Delivers calibrated tension of 900ā2,800 grams ā the exact therapeutic range used in clinical studies. Over 1 million units sold worldwide.
Medical Disclaimer: This content is for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any treatment.
SizeGenetics ā Science-first education about FDA-registered traction therapy from the inventors of the category (1994). Clinically proven. Over 1,000,000 devices sold worldwide.
We're the official YouTube channel for SizeGenetics, an FDA-registered Class II medical device developed by Danamedic ApS in Denmark. Danamedic didn't just make a penile traction device ā they invented penile traction therapy itself in 1994. That's 32 years of clinical engineering, over 1,000,000 devices sold, and a body of evidence spanning 15+ peer-reviewed studies.
SizeGenetics was co-invented by Dr. Jorn Ege Siana, a plastic surgeon, alongside medical advisors Dr. Finn Worm Knudsen and Dr. Michael Carter. The device delivers calibrated traction of up to 3,200 grams using the same tissue expansion science that surgeons have relied on for decades in reconstructive medicine.
If you're researching penile traction therapy right now, you've probably seen plenty of before-and-after claims online. User photos. Testimonials. Wild promises. But here's what you really need to know: there's actual clinical data on this. Not just stories, but peer-reviewed studies involving over a thousand patients, measured by physicians using standardized protocols. And I'm going to walk you through what that data actually shows.
Let me start with the headline finding. In 2023, researchers published the largest analysis to date on penile traction therapy outcomes. They pooled data from 12 separate clinical studies covering more than a thousand patients. The result? An average measured length gain of 1.9 centimeters. That's clinician-measured, using a standardized protocol called stretched penile length, not self-reported numbers or photos with questionable angles. This meta-analysis, led by Almsaoud and published in Translational Andrology and Urology, sits at the top of the evidence hierarchy. It synthesizes findings from multiple independent research groups, which means we're not relying on one small study or one outlier result.
Now, across those 12 studies, gains ranged from 1.3 to 1.9 centimeters. That variation isn't noise. It reflects real differences in study design, treatment duration, and most importantly, patient compliance. And compliance matters. A lot. The same meta-analysis reported an 82 percent adherence rate across studies. Patients who stuck with the protocol consistently saw stronger results. This isn't a one-week intervention. Clinical protocols typically involve four to nine hours of daily wear over several months. It requires commitment.
Let's talk about the measurement methodology for a moment, because this is what separates real clinical data from internet noise. Researchers use stretched penile length as the standard. A clinician measures from the pubic bone to the tip of the glans while applying a standardized stretch. This eliminates variability from arousal state, temperature, time of day, all the factors that make self-measurement unreliable. It's reproducible. It's comparable across studies. And it's the reason we can trust these numbers.
One of the most rigorous studies in this space is a randomized controlled trial, the gold standard for clinical research. Toussi and colleagues published this in The Journal of Urology in 2021. They randomly assigned 82 men to either a traction device group or a control group. The traction group gained an average of 1.6 centimeters. The control group? Point three centimeters. That difference was statistically significant, meaning it wasn't due to chance. This study directly addresses causality. It shows that the traction device itself produced the measured change.
Beyond length, there's compelling data on curvature correction, particularly for men with Peyronie's disease. The same 2023 meta-analysis documented a 27 percent mean reduction in penile curvature across pooled studies. Peyronie's disease causes fibrotic plaques that bend the penis and often lead to shortening. Traction therapy is the only non-surgical intervention with peer-reviewed evidence for both curvature reduction and length preservation or gain. Levine and colleagues documented this dual outcome in a 2008 study. Patients saw both straighter erections and length recovery, which is clinically meaningful for men dealing with the progressive effects of this condition.
Here's what I want you to understand. Individual results vary. The 1.9 centimeter average is a pooled mean, not a guarantee. Some men in these studies gained 1.3 centimeters. Some gained more. Factors like baseline anatomy, how consistently you use the device, and how long you stick with the protocol all influence outcomes. The studies showing the strongest results involved supervised medical use with high adherence rates. Real-world use without that structure may produce more modest gains.
This isn't about magic. It's about sustained mechanical tension applied over months, which gradually encourages cellular proliferation and tissue expansion. The evidence is there. The mechanism is biologically plausible. And the safety profile in clinical studies has been favorable when devices are used according to protocol.
So where does that leave you? If you're considering penile traction therapy, start with realistic expectations grounded in this data. Consult your healthcare provider. Establish a baseline measurement using proper technique. Understand that this requires consistent daily use over an extended period. And recognize that while the pooled clinical evidence shows measurable, statistically significant outcomes, your individual result will depend on factors specific to you.
The data is clear. Penile traction therapy produces clinician-measured changes in length and curvature. That's not anecdote. That's evidence.