The International Association for Surgical Metabolism and Nutrition IASMEN is an Integrated Society of the International Society of Surgery ISS/SIC. Membership application for IASMEN therefore has to go through the application process of ISS/SIC membership. Do not forget to indicate in the ISS/SIC application process that you wish to become IASMEN member as well.
The application form for ISS/SIC & IASMEN membership can be found at: https://iss-sic.com/membership
The Link below leads you to the Membership Directory of the International Society of Surgery which includes IASMEN members. To seek specifically for a IASMEN Member in your country, select your country and Integrated Society IASMEN and submit your request.