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Jes Extender Review: How and Why It Works


 In this article, I review the Jes Extender.

How It Works

The science behind Jes Extender goes back hundreds of years to areas of Africa. Many African tribes utilized primitive methods of extension, also called “hanging” or “stretching.” In northern Uganda, men would carve circular discs out of rocks and put these over their penises starting at puberty.

Over the years, their penises would get incredibly longer – up to 18 inches. Despite being so long, their penises retained thick girths. This confused researchers who thought that the penis hanging just stretched out the penis.


It took over a century before scientists began to research extension as a means of penis enlargement. Jes Extender is responsible for the sudden interest in penis enlargement – and it happened by accident.

In the early 1990s, Jes Muller (current CEO of DanaMedic, the company which makes Jes Extender) was commissioned to make a device for treating patients after penis surgeries. During certain surgeries in which the penis ligament is cut, penis shortening could occur. Doctors believed that a device which applied pressure on the penis would be able to prevent this shortening. They were surprised to discover that the device (now Jes Extender) did much more than this – it increased penis length and girth.

DanaMedic has conducted many clinical studies into penis extension which prove its effectiveness and safety. During these trials, the average gains were 28% in length and 19% in girth. Penis extension with Jes Extender is incredibly effective with over 95% of men having success. Jes Extender can also be used to correct Peyronie’s disease, a condition in which the penis curves abnormally. In trials, curvatures could be corrected by 70% or more according to

Jes Extender Studies

Aside from the many studies which DanaMedic has performed in their efforts to deliver you the most effective penis extender possible, there have been many independent studies into penis extension for non-surgical enlargement. Here are some of the most prestigious studies:

  • A Pilot Phase II Prospective Study to Test the Efficacy and Tolerability of A Penile Extender Device in the Treatment of Short Penis, published in the British Journal of Urology International, March 2009
  • Penile Enlargement without Surgery, presented by Dr. Eduardo Gomez de Diego at the 1st Virtual Sexology and Hispanoamerican Sexual Education Congress in 2001
  • Effects on Penile Size with Penile Extensor by Traction Force, performed by the Shanghai Institute of Andrology in 2001
  • Efficacy of The Daily Penis Stretching Technique to Elongate the Small Penis, presented at the 5th Congress of European Society for Sexual and Impotence Research in 2002
  • Can an External Penis Stretcher Reduce Peyronie’s Penile Curvature?, published in the International Journal of Impotence Research in 2001
  • Conservative Treatment in a Case of Induratio Penis Plastica, presented at the XXI National Congress of the SIA Regional Sections in 2004

Jes Extender has used this new research when designing clinical tests for their device. The continued research into penis extension has helped Jes Extender make innovative changes to their design so you get the most comfortable, effective and safe penis enlargement device possible. Learn more at


When you order Jes Extender, you will receive a DVD with precise video instructions showing you how to wear the extension device. You will also receive a recommended training program. This training program is clinically tested to give you safe results in the fastest time. However, you do not have to follow this exact program. Every time you wear Jes Extender, even if just a couple hours per week, you are getting a larger penis – it will just take longer to reach maximum results.

As with weightlifting, there is a maximum amount of growth that you will experience. Most men experience most penis growth within the first 4 months of using Jes Extender. After that, the growth slows down. Over a course of 6 months, the average gains were 28% of the initial length and 19% of initial girth. While results vary, you will get results with Jes Extender! Penis extension is proven to work which is why Jes Extender is confident about its double money-back guarantee!