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. By supporting The Obesity Society 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 advocacy.

By supporting The Obesity Society 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.
  • Support critical efforts in evidence-based policy development and advocacy.

The Obesity Society is excited to announce establishment of The Xavier Pi-Sunyer Award in honor of Professor Xavier Pi-Sunyer, MD. Dr Pi-Sunyer is a founding member of The Obesity Society and served as President from 1994-1995. Please click here to 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. Please click here to download Endowment Gift Agreement to view Terms & Conditions of your donation.

Questions? Please email us at [email protected].

NAASO, The Obesity Society, Inc. is a registered not-for-profit 501(c)(3) organization. Donations, whether made online or by mail, are non-refundable. No goods or services will be provided in exchange for your donation. Your donation is tax-deductible to the extent allowable by law. Our federal tax ID number is 54-1438429.