Give Today. Change Lives Tomorrow.

When you donate to The Obesity Society (TOS), you become a catalyst for better science, better care, and better outcomes for millions living with obesity. Your gift funds cutting-edge research, clinician training, evidence-based policy, and patient education that move the field forward.

Make a strategic impact — designate your gift to research, education, or advocacy.

Why Your Gift Matters

Accelerate research.

Fund studies that improve prevention, treatment, and long-term care.

Train clinicians and scientists.

Support professional development so care teams are equipped with the latest evidence.

Advance policy and advocacy.

Help translate evidence into policies that improve patient access and outcomes.

No Gift is Too Small.

ways to Give:

  • Donate Now — Fast, secure online processing (one-time or monthly).

  • Mail a Gift — Contact us for the address and instructions.

  • Planned Gifts & Bequests — Leave a legacy to support future generations.

  • Corporate & Foundation Partnerships — Sponsor programs or collaborate on strategic initiatives.

Quick FAQ

  • Is my donation tax-deductible? Yes — NAASO, The Obesity Society, Inc. is a 501(c)(3). Donations are non-refundable; consult your tax advisor for specifics. Our EIN: 54-1438429.

  • Need a receipt? A confirmation email is sent after each online gift.

  • Questions? Email us or call (301) 563-6526.