When you donate to The Obesity Society (TOS), you become a champion in the battle against obesity—because your funds support vital obesity research and programs.
Your generous contribution will positively impact the lives of millions of people affected by the disease of obesity by helping to further the understanding, treatment, and prevention of obesity and its complications. Questions? Please email us at [email protected].
By supporting TOS with your gift, you assist us in our mission to provide support for the professional development of scientists and clinicians working in this critical area of medical research, as well as supporting critical efforts in evidence-based policy development and patient advocacy.
Become a distinguished member of the Founders’ Circle today! The Founders’ Circle recognizes the vision and dedication of our founding members by helping to support the mission and special programming TOS provides via unrestricted monetary gifts that support evidence-based scientific and educational research, clinical training programs, and patient health education programs. As a Founders’ Circle member, you will be recognized as a donor for Founders’ Circle programs.
Please choose the Founders’ Circle level that’s right for you:
- Member – minimum gift of $50
- Supporting Member – minimum annual gift of $200
- Sustaining Member – minimum annual gift of $500
- Visionary Member – minimum annual gift of $1,000

Please write “FOUNDERS’ CIRCLE” in the memo field on the donation page.
Become a Legacy Member of the Founders’ Circle with a gift in your will. This gift gives you a chance to deepen your connection to TOS and provide ongoing support for the mission of the society. If you wish to join the Founders’ Circle as a Legacy Member, please email us at [email protected].
TOS has established the Xavier Pi-Sunyer Award in honor of Professor Xavier Pi-Sunyer, MD. Dr Pi-Sunyer is a founding member of TOS and served as President from 1994-1995. Learn more about his dedicated service to the obesity community. Donations are being taken in order to establish an endowment for the purposes of perpetuating this award. Download the Endowment Gift Agreement to view the terms and conditions of your donation. For donations of $25,000 or more, the Endowment Gift Agreement must be completed and signed by the donor and a TOS representative.
