Ann Oliva Boudreaux Metzinger (August 28, 1931 – May 6, 2022) was an American nutritionist, college professor and public health researcher.

She taught at Tulane University School of Public Health and Tropical Medicine for 42 years, beginning in 1967.

[6] Metzinger became a professor at Tulane's School of Public Health in 1967, and taught nutrition there until her retirement with emeritus status in 2009.

[4][9] She worked at the United States Public Health Service Hospital at Carville, and at the Charity Hospital of New Orleans, early in her career,[3] and later in Zaire, Colombia, Algeria, and Haiti[10] consulting on public health and nutrition projects.

She was a nutrition fellow of the Louisiana Geriatric Education Center, and in 2012 received the Lifetime Achievement in Global Health Award from Tulane.