UMMS Affiliation

Department of Pediatrics; Department of Quantitative Health Sciences

Publication Date


Document Type



Endocrinology, Diabetes, and Metabolism | Pediatrics


BACKGROUND: The effects of vitamin D supplementation on mild hepatic dysfunction and glycemic control are unclear in children and adolescents with either type 1 (T1D) or type 2 diabetes (T2D).

HYPOTHESIS: Vitamin D supplementation will improve hepatic dysfunction and glycemic control.

AIM: To determine the effect of vitamin D supplementation on alanine transaminase (ALT), hemoglobin A1c (HbA1c), and serum 25-hydroxyvitamin D [25(OH)D] concentration.

SUBJECTS AND METHODS: A retrospective study of 131 subjects with either T1D (n = 88∶46 females, 42 males), or T2D (n = 43∶26 females, 17 males) of ages 3-18 years between 2007-2013. All subjects had (1) a diagnosis of diabetes for >12 mo, (2) received vitamin D supplementation for the management of vitamin D deficiency (3) had baseline and subsequent simultaneous measurements of HbA1c, ALT, and 25(OH)D. Vitamin D deficiency was defined as 25(OH)D concentration of/L (20 ng/mL).

RESULTS: At baseline, vitamin D deficiency occurred in 72.1% of patients with T2D and in 37.5% of T1D patients (p

CONCLUSIONS: Vitamin D supplementation in subjects with T2D was associated with statistically significant decreases in BMI SDS, ALT, and a clinically-significant decrease in HbA1c.


Adolescents, Children, Diabetes Mellitus, Fatty Liver, Insulin, Type 2 Diabetes, Vitamin D deficiency

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Copyright 2014 Nwosu, Maranda. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

DOI of Published Version



Nwosu BU, Maranda L (2014) The Effects of Vitamin D Supplementation on Hepatic Dysfunction, Vitamin D Status, and Glycemic Control in Children and Adolescents with Vitamin D Deficiency and Either Type 1 or Type 2 Diabetes Mellitus. PLoS ONE 9(6): e99646. doi:10.1371/journal.pone.0099646. Link to article on publisher's website

Journal/Book/Conference Title

PLoS One


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Dataset Vitamin D Supplementation and Diabetes Study Nwosu 5-5-2014.xlsx (47 kB)
Dataset Vitamin D Supplementation and Diabetes Study Nwosu 5-5-2014