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KMID : 0380919960250020225
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Journal of the Korean Society of Food Nutrition
1996 Volume.25 No. 2 p.225 ~ p.231
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Protein Digestibility and Nitrogen Balance in Korean Children
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Oh Seung-Ho
Lee Sung-Sug
Lee Kyung-Hwa
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Abstract
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This study was conducted to obtain data on dietary intake, digestibility and nitrogen balance of protein in Korean children. Fifteen subjects aged from 8 to 12 years maintained their menu and life pattern as usual during a 4-week study. The same amount of diet that the subjects had consumed, and feces and urine were collected and measured to extract their nitrogen content data by Kjeldahl method. From above data, apparent digestibility and the body nitrogen balance were estimated by determining daily protein intake and excretion. The daily protein intake was 52.3±1.2g for the boys and 43.1±1.3g for the girls. Daily fecal protein loss was 9.2±0.3g for the boys and 7.8±0.2g for the girls. Apparent digestibility of protein did not differ between boys and girls(boys 81.9±0.6%, girls 81.3±0.4%). And these results were smiliar to protein digestibity(80~85%) of other age group. The urinary nitrogen excretion was 5.3±0.1g for the boys and 3.9±0.2g for the girls. The nitrogen balance considering nitrogen excretion from feces and urine indicated positive balance of 1.6±0.1g for the boys and 1.7±0.1g for the girls.
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KEYWORD
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apparent digestibility, nitrogen balance, urinary nitrogen, fecal protein
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