About Diennet

Who We are

The Diennet Institute is the world’s most effective Weight Loss Research Center. Founded in 1975 by Dr. Marcel Diennet, MD, we specialize in a customized approach to weight loss in which every patient receives a unique treatment custom designed to meet his or her specific needs under the supervision of a licensed physician.


At Diennet Institute, we understand that weight loss is different for everyone. We believe that finding peak hormonal balance is key to weight loss success and overall emotional and physical well-being. That’s why we look closely at your personal medical history, unique hormonal make up, and lifestyle habits before formulating a physician-prescribed treatment that is customized specially for you. Overtime we reformulate your prescription as necessary, to make sure your treatment is working effectively and to help you achieve maximum results that last.

Advanced Technology

During the 1970s, Dr. Marcel Diennet recognized the potential medical uses of computers – and he’s been helping patients ever since. To track the effectiveness of medical treatments, Dr. Diennet has built a database containing more than 38 years of treatment data from more than 130,000 patients – including history, treatment and results. When you sign up for the Diennet custom medical weight loss treatment, historical data is used to quickly determine the best formula for you, increasing the effectiveness of your treatment and guaranteeing weight loss success. Your licensed physician is always part of this process.

A History of Weight Loss Success

Since 1975, Dr. Diennet has helped more than 130,000 men and women – including royalty, political leaders and celebrities – lose weight and feel more confident. He treats each and every case with the same care and expertise, and is determined to help you improve your body and your life with a custom weight loss treatment that works.