[3] As a professor of nutrition, she led two studies in Honduras which concluded that infants should receive only breast milk for their first six months of life.
"[6] In the same year, Dewey was also the lead researcher on a study which found that diet and aerobic exercise could help breast feeding mothers lose weight after pregnancy.
[10] In 2010, Dewey led a research team in Bangladesh and Guatemala to test whether Nutributter could prevent stunting and abnormal motor development in malnutritioned children.
[13] In 2017, Dewey was appointed to sit on the Food and Nutrition Board of the National Academies of Sciences, Engineering, and Medicine for a three-year term.
[14] The following year, she elected a Fellow of the American Society for Nutrition[15] and named to sit on the 2020 Dietary Guidelines Advisory Committee.