Amends the Public Health Service Act to require the Secretary of Health and Human Services to convene a Task Force on Obesity to: (1) establish a government-wide strategy for preventing and reducing overweight and obesity that includes defining clear roles, responsibilities, and accountability for all federal agencies; (2) coordinate effective interagency coordination and priorities for action among federal agencies, including short-term and long-term goals for childhood and adult obesity rates; and (3) implement, and evaluate the effectiveness of, such strategy.