[7] Along with Margery and Catherine Vaughn, they conducted a year-long survey in 1929 of gardens and livestock to determine nutritional problems that coastal fishing towns were having.

[4] Paul V. McNutt from the Federal Emergency Management Administration supervised Mitchell's duty of elevate nutrition throughout the U.S. by compiling state resources.

[12] In 1960 she also worked as an exchange professor for Hokkaido University in Japan and conducted research on nutrition of Japanese orphanage children after World War II.

[13][15] Working with Setsuko Santo, they determined in their first survey in 1960 that the children's stature was well below that of the national Hokkaido average based on nutritional disadvantages like lacking protein and vitamin A.

[15] In the early 1900s, Harvey Kellogg, a mentor to Mitchell, was a well known faddist who believed in the vegetarian diet at the Battle Creek Sanitarium.

[12] She was particularly critical of the Dr. Hey diet which said that acidic and alkaline foods could not be digested together, she considered these claims irrational and believed they discredited the field of nutrition.