A photo of Marialena Mouzaki.

Marialena Mouzaki, MD, MSc

  • Medical Director, Advanced Nutrition Services
  • Associate Director, Steatohepatitis Program
  • Fellowship Program Director, Advanced Nutrition Fellowship
  • Professor, UC Department of Pediatrics


MD: National and Kapodistrian Medical School of Athens, Greece, 2005.

Residency: General Pediatrics, Penn State Children's Hospital, Hershey, PA, 2009.

Clinical Fellowship: Hospital for Sick Children, Toronto, ON, Canada, 2010.

Clinical/Research Fellowship: Hospital for Sick Children, Toronto, ON, Canada, 2012.

Teaching Scholars Program: Hospital for Sick Children, Toronto, ON, Canada, 2016.

MSc: University of Toronto, Toronto, ON, Canada, 2012.

Certification: General Pediatrics, 2009; Pediatric Gastroenterology, 2013; National Board of Physician Nutrition Specialists, 2018; National Board of Physician Nutrition Scientists, 2018; Diplomat of the American Board of Obesity Medicine, 2022.



Nutrition and specifically MASLD; pediatric gastroenterology

Services and Specialties

Gastroenterology GI, Steatohepatitis


Pediatric MASLD

Research Areas

Gastroenterology Hepatology and Nutrition

Additional Languages


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Development of Fibro-PeN, a clinical prediction model for moderate-to-severe fibrosis in children with nonalcoholic fatty liver disease. Wang, A; Blackford, AL; Behling, C; Wilson, LA; Newton, KP; Xanthakos, SA; Fishbein, MH; Vos, MB; Mouzaki, M; Molleston, JP; Wagoner, A; Wilson, LA; Woreta, T; Yates, KP. Hepatology. 2024; 79:1381-1392.

Paediatric steatotic liver disease has unique characteristics: A multisociety statement endorsing the new nomenclature. Baumann, U; Koot, BG P; Fitzpatrick, E; Mann, J; Vajro, P; Krag, A; Newsome, PN; Shawcross, D; Francque, S; Böttler, T; Ibrahim, S; Xanthakos, S; Treepongkaruna, S; Mitsinikos, T; Mitsinikos, T. Journal of Pediatric Gastroenterology and Nutrition. 2024; 78:1190-1196.

Su2029 INTERVENTIONAL RADIOLOGY VS. ENDOSCOPIC ULTRASOUND GUIDED LIVER BIOPSIES IN PEDIATRIC MASLD. Schwartz, TS; Mouzaki, M; Berklite, L; Lopez-Nunez, O; Miethke, A; Xanthakos, S; Vitale, DS. Gastroenterology. 2024; 166:s-898.

Gestational and Developmental Contributors of Pediatric MASLD. Mouzaki, M; Woo, JG; Divanovic, S. Seminars in Liver Disease. 2024; 44:43-53.

Nutritional deficiencies in children. Ali, F; Mouzaki, M; Paulson, AL. Current Opinion in Gastroenterology. 2024; 40:106-111.

Food Insecurity and Pediatric Nonalcoholic Fatty Liver Disease Severity. Orkin, S; Zhao, X; Setchell, KD R; Carr, E; Arce-Clachar, AC; Bramlage, K; Huang, R; Fei, L; Beck, AF; Fawaz, R; Valentino, PL; Xanthakos, SA; Mouzaki, M. The Journal of Pediatrics. 2024; 265:113818.

Nutrition assessment and MASH severity in children using the Healthy Eating Index. Jain, AK; Buchannan, P; Yates, KP; Belt, P; Schwimmer, JB; Rosenthal, P; Murray, KF; Molleston, JP; Scheimann, A; Xanthakos, SA; Boyett, S; Contos, MJ; Luketic, VA C; Sanyal, AJ. Hepatology Communications. 2023; 7:e0320.

Thermoneutral Housing Enables Studies of Vertical Transmission of Obesogenic Diet-Driven Metabolic Diseases. Wayland, JL; Doll, JR; Lawson, MJ; Stankiewicz, TE; Oates, JR; Sawada, K; Damen, MS M A; Alarcon, PC; Haslam, DB; Trout, AT; Woo, JG; Moreno-Fernandez, ME; Mouzaki, M; Divanovic, S. Nutrients. 2023; 15:4958.

Clinical Performance of Transient Elastography With Comparison to Quantitative Magnetic Resonance Imaging, Ultrasound, and Biopsy in Children and Adolescents With Known or Suspected Fatty Liver Disease. Alves, VP V; Trout, AT; Dewit, M; Mouzaki, M; Arce-Clachar, AC; Bramlage, KS; Dillman, JR; Xanthakos, SA. Childhood Obesity. 2023; 19:461-469.

Prevalence of incidental sonographic findings of hepatic steatosis in children under 4 years of age. Green, S; Mouzaki, M; Abu Ata, N; Trout, AT. Pediatric Radiology: roentgenology, nuclear medicine, ultrasonics, CT, MRI. 2023; 53:2221-2228.

From the Blog

The Importance Of Nutrition To Wound Healing
Blog Healthy Living

The Importance Of Nutrition To Wound Healing

By Marialena Mouzaki, MD, MSc10/15/2021

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