Which of the following is not a governmental agency related to health?

The American Heart Association is not a governmental agency; it is a nonprofit organization focused on fighting heart disease and stroke. This association engages in research, education, and advocacy to promote heart health and prevent cardiovascular disease. It operates independently from the government and is funded primarily through donations and fundraising efforts.

In contrast, the other options listed are all governmental agencies. The Food and Nutrition Board, for instance, is part of the National Academies of Sciences, Engineering, and Medicine and is involved in establishing dietary guidelines and nutrition standards for the public. The Department of Health and Human Services is the U.S. government's principal agency for protecting the health of all Americans and providing essential human services. The Food and Drug Administration is responsible for regulating food safety, pharmaceuticals, and various forms of medical products, ensuring that they meet strict safety standards. Each of these agencies plays a critical role in the development and enforcement of health-related policies and regulations at the federal level.