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Whole Blood and Plasma Vitamin C Level in Healthy Middle and High School Students in Chinju

Journal of the Korean Pediatric Society 1999;42(6):748-755.
Published online June 15, 1999.
Whole Blood and Plasma Vitamin C Level in Healthy Middle and High School Students in Chinju
Yang-Suk Jung1, Jae-Young Lim1, Eun-A Kim1, Yun-Kyeong Cho1, Chan-Hoo Park1, Hyang-Ok Woo1, Hee-Shang Youn1, Gyung-Hyuck Ko2, Seung-Chul Baik3, Woo-Kon Lee3, Myung-Je Cho3, Kwang-Ho Rhee3
1Departments of Pediatrics, Gyeongsang National University College of Medicine, Chinju, Korea
2Departments of Pathology, Gyeongsang National University College of Medicine, Chinju, Korea
3Departments of Microbiology, Gyeongsang National University College of Medicine, Chinju, Korea
중․고등학생의 전혈 및 혈장 비타민 C 농도 : 진주지방
정양숙1, 임재영1, 김은아1, 조윤경1, 박찬후1, 우향옥1, 윤희상1, 고경혁2, 백승철3, 이우곤3, 조명제3, 이광호3
1경상대학교 의과대학 소아과학교실
2경상대학교 의과대학 병리학교실
3경상대학교 의과대학 미생물학교실
Correspondence: 
Hee-Shang Youn, Email: 1
Abstract
Purpose
: Recommended dietary allowance of vitamin C was determined without considering the important function of vitamin C as a first-line antioxidant. We measured the whole blood and plasma vitamin C concentrations of healthy middle and high school students in Chinju to assess the optimal daily vitamin C requirement in these age groups.
Methods
: Whole blood and plasma vitamin C concentrations were measured by the 2, 4-dinitrophenylhydrazine method in 780 students from 1st to 3rd grade of at a middle school and high school in Chinju during June 1996.
Results
: Whole blood and plasma vitamin C concentrations were 1.42¡¾0.40mg/dL and 0.92¡¾0.40 mg/dL, respectively. Whole blood and plasma vitamin C concentrations decreased as the school grade became higher. Whole blood and plasma vitamin C concentrations did not differ between females and males in the middle school. However, female high school students had a significantly higher whole blood and plasma vitamin C concentrations than male high school students(P<0.001). Fourteen of 390 middle school students(3.4%) and 23 of 390 high school students(5.9%) had whole blood vitamin C concentrations of less than 0.8mg/dL. Forty-six of 390 middle school students (11.7%) and 113 of 390 high school students(29.0%) had plasma vitamin C concentrations less than 0.6mg/dL. Especially, 45.2% of male high school students had plasma vitamin C concentrations of less than 0.6mg/dL.
Conclusion
: Some adolescents, especially almost half the male high school students, didn't have satisfactory plasma vitamin C levels.
Key Words: Whole blood, Plasma, Vitamin C, Antioxidant, Adolescents


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