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KMID : 0381019860190010032
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Korean Journal of Nutrition
1986 Volume.19 No. 1 p.32 ~ p.40
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The Effect of Meat Protein and Soy Protein on Calcium Metabolism in Young Adult Korean Women
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Abstract
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The present study was conducted to examine the effects of proteins from different sources on Ca excretion in 6 healthy young adult Korean women. The subjects were given meat protein diet for 5 days and soy protein diet for subsequent 5 days. The two diets were similar in protein and Ca contents. Urinary and fecal samples were collected for the last 2 days of each diet period and were analyzed for Ca and P.
The results were as following :
1 ) Mean daily urinary calcium excretion was 126.5 22.70 mg for meat protein diet and 83.7 17.19mg for soy protein diet and the difference was significant( P <0.025).
2 ) Fecal Ca excretion did not show significant difference between two experimental preiod : 466.9 73.68mg for meat protein diet 284.4 54.96mg for soy protein diet.
3) Three out of six subjects showed negative balance on meat protein diet, but only one showed negative balance on soy protein diet. The average of the balances on meat protein diet was 65.4 68.19 and that of soy protein diet was 155.3 52.28 ; the diff erence was significant ( P < 0.025).
4 ) Urinary P excretion tended to be higher on meat protein diet but was not significant compared to soy protein diet. Fecal P excretion was significantly higher ( P < 0.001) on soy protein diet. Overall P balances for meat protein diet and soy protein diet were 219.49 mg and 229.46mg respectively(P>0.05).
The above results show that urinary Ca excretion was significantly higher on meat protein diet but fecal excretion did not show significant difference between meat protein diet and soy protein diet. The overall Ca balance was significantly higher on Soy protein diet compared to meat protein diet.
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