Jonathon Maguire


Scientist, Li Ka Shing Knowledge Institute


Dr. Jonathon Maguire is an assistant professor of Pediatrics at the University of Toronto, a scientist in the Li Ka Shing Knowledge Institute of St. Michael’s Hospital and a staff pediatrician in the Department of Pediatrics at St. Michael’s Hospital with an active pediatric hospitalist and outpatient clinical practice. His research interests focus on clinical trials involving nutrition and development in young children as well as the creation of tools to facilitate evidence informed child health practice. He co-leads TARGet Kids!, the largest primary care research network for children in Canada. He has received a number of peer reviewed operating grants including a 2015 CIHR Foundation Grant as well as a several awards including the Samuel J. Fomon Young Physician Award from the American Society of Nutrition, the Canadian Paediatric Society Young Investigator Award, a Canadian Institutes of Health Research New Investigator Award and an Ontario Ministry of Research and Innovation Early Researcher Award.

Recent Publications

  1. Cox, KA, Parkin, PC, Anderson, LN, Chen, Y, Birken, CS, Maguire, JL et al.. Association Between Meat and Meat-Alternative Consumption and Iron Stores in Early Childhood. Acad Pediatr. ;16 (8):783-791. doi: 10.1016/j.acap.2016.01.003. PubMed PMID:26804490 .
  2. Anderson, LN, Maguire, JL, Lebovic, G, Hanley, AJ, Hamilton, J, Adeli, K et al.. Duration of Fasting, Serum Lipids, and Metabolic Profile in Early Childhood. J. Pediatr. 2016; :. doi: 10.1016/j.jpeds.2016.09.005. PubMed PMID:27742126 .
  3. Mansuri, S, Badawi, A, Kayaniyil, S, Cole, DE, Harris, SB, Mamakeesick, M et al.. Traditional foods and 25(OH)D concentrations in a subarctic First Nations community. Int J Circumpolar Health. ;75 :31956. . PubMed PMID:27664115 .
  4. De Souza, LR, Berger, H, Retnakaran, R, Vlachou, PA, Maguire, JL, Nathens, AB et al.. Hepatic fat and abdominal adiposity in early pregnancy together predict impaired glucose homeostasis in mid-pregnancy. Nutr Diabetes. 2016;6 (9):e229. doi: 10.1038/nutd.2016.39. PubMed PMID:27643724 .
  5. Saunders, NR, Parkin, PC, Birken, CS, Maguire, JL, Borkhoff, CM, TARGet Kids! Collaboration et al.. Iron status of young children from immigrant families. Arch. Dis. Child. 2016; :. doi: 10.1136/archdischild-2015-309398. PubMed PMID:27582457 .
  6. Kapadia, MZ, Joachim, KC, Balasingham, C, Cohen, E, Mahant, S, Nelson, K et al.. A Core Outcome Set for Children With Feeding Tubes and Neurologic Impairment: A Systematic Review. Pediatrics. 2016;138 (1):. doi: 10.1542/peds.2015-3967. PubMed PMID:27365302 .
  7. Furlong, KR, Anderson, LN, Kang, H, Lebovic, G, Parkin, PC, Maguire, JL et al.. BMI-for-Age and Weight-for-Length in Children 0 to 2 Years. Pediatrics. 2016;138 (1):. doi: 10.1542/peds.2015-3809. PubMed PMID:27343232 .
  8. van den Heuvel, M, Chen, Y, Abdullah, K, Maguire, JL, Parkin, PC, Birken, CS et al.. The concurrent and longitudinal associations of temperament and nutritional risk factors in early childhood. Pediatr Obes. 2016; :. doi: 10.1111/ijpo.12161. PubMed PMID:27273610 .
  9. Vanderhout, SM, Birken, CS, Parkin, PC, Lebovic, G, Chen, Y, O'Connor, DL et al.. Higher milk fat content is associated with higher 25-hydroxyvitamin D concentration in early childhood. Appl Physiol Nutr Metab. 2016;41 (5):516-21. doi: 10.1139/apnm-2015-0671. PubMed PMID:27138972 .
  10. Bartsch, E, Medcalf, KE, Park, AL, Ray, JG, High Risk of Pre-eclampsia Identification Group. Clinical risk factors for pre-eclampsia determined in early pregnancy: systematic review and meta-analysis of large cohort studies. BMJ. 2016;353 :i1753. . PubMed PMID:27094586 PubMed Central PMC4837230.
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Affiliations & Other Activities

  • Staff Pediatrician, Department of Pediatrics, St. Michael’s Hospital
  • Assistant professor of Pediatrics, University of Toronto