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Michelle (Shelley) McGuire

Michelle (Shelley) McGuire

Director and Professor


Niccolls Building, Room 105B



Mailing Address

School of Family and Consumer Sciences
University of Idaho
875 Perimeter Drive MS 3183
Moscow, ID 83844-3183

Please contact Shelley McGuire to learn about graduate student opportunities.

  • Maternal/infant nutrition
  • Human milk composition
  • Breastfeeding
  • Milk microbiome
  • Lipids
  • Postpartum anovulation
  • International nutrition
  • Leprosy

  • Demmelmair H, Jimenez E, Collado MC, Salminen S, McGuire MK. (2020) Maternal and perinatal factors associated with the human milk microbiome. Curr Dev Nutr, (1,6) in press
  • Casavale KO, Ahuja KJC, Wu X, Li Y, Quam J, Olson R, Pehrsson P, Allen L, Balentine D, Hanspal M, Hayward D, Hines EP, McClung JP, Perrine CG, Brown Belfort M, Dallas D, German B, Kim J, McGuire M, McGuire M, Morrow A, Neville M, Nommsen-Rivers L, Rasmussen KM, Zempleni J, Lynch CJ. (2019) NIH workshop on human milk composition: summary and visions. Am J Clin Nutr, 2019 Jul 5. pii: nqz123. doi: 10.1093/ajcn/nqz123.
  • Heimburger DC, Hermann M, McClung JP, McGuire MK, Rasmussen KM, Troy LM, Young SL. (2019) The early-career Dannon Institute Leadership Institute: History, programmatic features, outcomes, and perspectives. community. Nutr Today, 2019;54(4):165Y169. 
  • Williams JE, Carrothers JM, Lackey KA, Beatty NF, Brooker SL, Peterson HK, Steinkamp KM, York MA, Shafii B, Price WJ, McGuire MA, McGuire MK. (2019) Strong multivariate relationships exist among milk, oral, and fecal microbiomes in mother-infant dyads during the first six months postpartum. J Nutr, 149(6):902-914. 
  • Lane AA, McGuire MK, McGuire MA, Williams JE, Lackey KA, Hagen EH, Kaul A, Gindola D, Gebeyehu D, Flores KE, Foster JA, Sellen DW, Kamau-Mbuthia E, Kamundia EW, Mbugua S, Moore SE, Prentice AM, Kvist LJ, Otoo G, Rodriguez JM, Ruia L, Pareja RG, Bode L, Price WJ, Meehan CL. (2019) Household composition and the infant fecal microbiome: the INSPIRE study. Am J Phys Anthropol, 1–14.
  • Lackey KA, Williams JE, Meehan CL, Zachek JA, Benda ED, Price WJ, Foster JA, Sellen DW, Kamau-Mbuthia EW, Kamundia EW, Mbugua S, Moore SE, Prentice AM, Gindola D, Kvist LJ, Otoo GE, Jimenez E, Ruiz L, Rodriguez JM, Pareja RG, Bode L, McGuire MA, McGuire MK. (2019) What’s normal? Microbiomes in human milk and infant feces are related to each other but vary geographically. Front Nutr, 6:45. doi: 10.3389/fnut.2019.00045. 
  • Reeves WR, McGuire MK, Vicini J, Stokes M. (2019) Assessing the safety of pesticides in food: how current regulations protect health. Adv Nutr, 10(1):80-88. (6)
  • Meehan CL, Lackey KA, Hagen EH, Williams JE, Roulette J, Helfrecht C, McGuire MA, McGuire MK. (2018) Social networks, cooperative breeding, and the human milk microbiome. Am J Hum Biol, 2018 Apr 26:e23131. doi: 10.1002/ajhb.23131. 
  • Lackey KA, Williams JE, Price WJ, Carrothers JM, Brooker SL, Shafii B, McGuire MA, McGuire MK. (2017) Comparison of commercially-available preservatives for maintaining the integrity of bacterial DNA in human milk. J Microbiol Methods, Oct;141:73-81. 
  • Williams J, Carrothers JM, Lackey KA, Beatty NF, York MA, Brooker SL, Shafii B, Price WJ, Settles M, McGuire MA, McGuire MK. (2017) Human milk microbial community structure is relatively stable and related to variation in macronutrient and micronutrient intakes in healthy lactating women. J Nutr, 2017 Sep;147(9):1739-1748. (1,2,3,4,6)
  • Williams JE, Price WJ, Shafii B, Yavah KM, Bode L, McGuire MA, McGuire MK. (2017) Relationships among microbial communities, maternal cells, oligosaccharides, and macronutrients in human milk. J Hum Lact, 2017 Aug;33(3):540-551. 
  • Ruiz L, Manzano S, McGuire MK, Meehan CL, McGuire MA, Williams JE, Brooker S, Foster J, Sellen DW, Kamau-Mbuthia EW, Kamundia EW, Mbugua S, Moore SE, Kvist LJ, Otoo GE, Lackey KA, Pareja R, Bode L, Rodriguez JM. (2017) What’s normal? Immune profiling of human milk from healthy women living in different geographical and socio-economic settings. Front Immunol, doi: 10.3389/fimmu.2017.00696. 
  • McGuire MK, Meehan CL, McGuire MA, Williams JE, Foster J, Sellen DW, Kamau-Mbuthia EW, Kamundia EW, Mbugua S, Moore SE, Prentice AM, Kvist LJ, Otoo GE, Brooker SL, Price WJ, Shafii B, Placek C, Lackey KA, Robertson B, Manzano S, Ruíz L, Rodríguez JM, Pareja RG, Bode L. (2017) What's normal? Oligosaccharide concentrations and profiles in milk produced by healthy women vary geographically. 105 2017 May;105(5):1086-1100.

Michelle (Shelley) McGuire received her bachelor’s in biology from the University of Illinois (1986), a master’s in nutritional sciences from the University of Illinois (1988) and doctorate in human nutrition from Cornell University (1994). Her research focuses primarily on understanding better how maternal diet and nutritional status influence human milk composition and maternal/infant health during breastfeeding. Of particular interest to her research is understanding the importance of dietary lipids to maternal and infant health.

Shelley also has a long-standing interest in understanding the physiologic mechanisms driving the return of ovulatory function during the postpartum period. Recently, Shelley and her colleagues Mark McGuire and Janet Williams (both at the University of Idaho) have become intrigued by the presence and variability of bacteria in human milk (known as the human milk microbiome). As an extension, they are also interested in how the milk microbiome impacts short- and long-term infant health both in the U.S. and globally. Shelley’s research has been funded by a variety of groups including the U.S. Department of Agriculture, National Institutes of Health, National Science Foundation, Bill and Melinda Gates Foundation and commodity groups such as the National Cattlemen’s Beef Association and the Idaho Dairy Commission. McGuire is also passionately committed to bettering human health through the provision of user-friendly, high-quality, evidence-based nutrition information to the press and public.

Shelley is a seasoned science writer, having coauthored two introductory textbooks: one in its third edition (Nutritional Sciences: from Fundamentals to Food, Cengage Published) and the other in its second edition (NUTR, Cengage Publishing).

Shelley lives with her husband (Mark, associate dean of research and director of Idaho Agricultural Experiment Station, University of Idaho) and their Nova Scotia Duck Tolling Retrievers in Moscow, Idaho. When she’s not engaged in teaching, research or service, she enjoys being with her family and friends, traveling, cooking and eating, running, playing the flute, singing and practicing Iyengar yoga.

  • Excellence in Nutrition Education Award, American Society for Nutrition, 2018
  • Thomas E. Lutz Teaching Excellence Award, Washington State University College of Arts and Sciences, 2016
  • National Spokesperson for the American Society for Nutrition, 2008-2017
  • Ehrlich-Koldovsky Award, given by the International Society for Research in Human Milk and Lactation to “recognize a young investigator who has begun to make outstanding, original scientific contributions to the study of human milk and lactation,” 2002
  • Future Leader Award, International Life Sciences Institute, 2000
  • Phi Beta Kappa Honorary (University of Illinois chapter), 1986

COVID-19 & Breast Milk

Studying the safety of breastfeeding in COVID-19 infected mothers.

Participants wanted


Margaret Ritchie School of Family & Consumer Sciences

Physical Address:
Mary Hall Niccolls Building, Rm 103
751 Campus Drive

Mailing Address:
875 Perimeter Dr. MS 3183
Moscow, ID 83844-3183

Phone: 208-885-6546

Fax: 208-885-5751




Mailing Address:
322 E. Front Street, Suite 180
Boise, ID 83702

Phone: 208-334-2999

Fax: 208-364-4035




Mailing Address:
1031 N. Academic Way, Suite 242
Coeur d'Alene, ID 83814-2277

Phone: 208-667-2588

Fax: 208-664-1272