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Updated: Jun 21, 2026

Biochemical Measurement of Neonatal Hypoxia
Published on: August 24, 2011
Antioxidant vitamins and hyperbilirubinemia in neonates
Khalid K Abdul-Razzak1, Mohamad K Nusier, Ahmad D Obediat
1Department of Clinical Pharmacy, Jordan University of Science and Technology, Faculty of Pharmacy, Irbid, Jordan. kkalani@just.edu.jo
Insights
Low plasma levels of vitamin C and vitamin E are linked to severe neonatal hyperbilirubinemia in full-term infants. These findings highlight the importance of antioxidant status in newborn jaundice management.
Area of Science:
- Neonatology
- Biochemistry
- Pediatric Nutrition
Background:
- Neonatal hyperbilirubinemia is a common condition in newborns.
- Antioxidant systems may play a role in the development and severity of neonatal jaundice.
- Glucose-6-phosphate dehydrogenase (G6PD) activity is crucial for red blood cell protection.
Purpose of the Study:
- To investigate the association between plasma vitamin E and C levels and the severity of hyperbilirubinemia.
- To examine this relationship in full-term neonates with normal G6PD activity.
Main Methods:
- A cohort of 130 full-term neonates with normal G6PD activity was studied.
- Plasma levels of total bilirubin, vitamin E, and vitamin C were measured on day one of life.
- Routine blood analyses, including hemoglobin and hematocrit, were performed.
Main Results:
- Neonates with significant hyperbilirubinemia had markedly lower plasma vitamin C (P=0.0001) and vitamin E (P=0.001) levels compared to those without.
- Lower hemoglobin and hematocrit levels were also observed in neonates with hyperbilirubinemia.
- No significant differences in gestational age or birth weight were found between groups.
Conclusions:
- Low plasma concentrations of vitamins C and E are significantly associated with increased severity of hyperbilirubinemia in term newborns.
- These findings suggest a potential role for antioxidant vitamins in preventing or managing neonatal jaundice.
Objective:
Low antioxidant system may contribute to the severity of neonatal hyperbilirubinemia. The aim of this research was to explore the relationship between plasma vitamin E and C levels and the severity of hyperbilirubinemia in full-term neonates with normal glucose 6-phosphate dehydrogenase (G6PD) activities.
Methods:
A total of 130 full-term healthy live birth neonates of healthy mothers with normal G6PD activity were included in this study. In addition to routine blood analysis, plasma total bilirubin, vitamin E and C levels and G6PD activity were measured on the first day of life. None of the neonates was ABO incompatible or anemic.
Results:
Neonates who did not develop hyperbilirubinemia (n=119) had a mean plasma bilirubin level of 65+/-24 micromol/l (median 58.1), while neonates who developed significant hyperbilirubinemia (n=11) had a mean plasma bilirubin level of 238+/-56 micromol/l (median 246.2) on the first day of life. Mean plasma vitamin C levels of neonates who developed hyperbilirubinemia were significantly lower than those who did not develop hyperbilirubinemia (87+/-22 micromol/l (median 89.4) vs. 132+/-36 micromol/l (median 127.7), respectively, P=0.0001). Similar results were observed for plasma vitamin E levels in neonates who did or did not develop hyperbilirubinemia (7.5+/-2 micromol/l (median 6.3) vs. 10.4+/-5 micromol/l (median 9.1), respectively, P=0.001). Hemoglobin and hematocrit were significantly lower in neonates who developed hyperbilirubinemia (P=0.0002 and P=0.0003, respectively), although gestational age and birth weight for the two groups showed no significant difference.
Conclusion:
The results of the present work indicate that low level of plasma vitamins C and E are associated with significant hyperbilirubinemia in full-term neonates.
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