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Endogenous nitrogen excretion and utilization of dietary protein

Published online by Cambridge University Press:  25 March 2008

B. M. Nicol  and
P. G. Phillips
B. M. Nicol
Affiliation:
Nutrition Unit, Federal Ministry of Health, Kaduna, Nigeria
P. G. Phillips
Affiliation:
Nutrition Unit, Federal Ministry of Health, Kaduna, Nigeria
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Abstract

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1. The endogenous nitrogen losses of men of different ethnic, ecological and socio-economic backgrounds are similar when calculated per unit body-weight or per unit basal energy consumption. The hypothesis that endogenous N losses, adjusted upwards by a factor of 0.30 to equate them with N equilibrium, can be used to derive man's physiological requirements for proteins of high quality, e.g. those of egg and milk, was studied..

2. Men living in Nigeria, accustomed to eat diets which provided mixtures of protein only slightly higher than the ‘safe level of intake’ proposed by the Joint FAO/WHO ad hoc Expert Committee on Energy and Protein Requirements (FAO/WHO, 1973), were found to use absorbed N more efficiently than University of California students who habitually consume diets which supply a great excess of protein over that ‘safe level’..

3. The greater protein-sparing effect of carbohydrates than of fats and oils may play a part in this more efficient use of protein by men living in developing countries. Also, man possesses mechanisms in intermediary metabolism which allow him to adjust to low levels of protein intake..

4. Thus it appears that all apparently healthy men cannot be considered equal in regard to their requirements for protein.

Type
Papers of direct relevance to Clinical and Human Nutrition
Information
British Journal of Nutrition , Volume 35 , Issue 2 , March 1976 , pp. 181 - 193
Copyright
Copyright © The Nutrition Society 1975

References

Block, R. J. & Mitchell, H. H. (1946). Nutr. Abstr. Rev. 16, 249.Google Scholar
Calloway, D. H. & Margen, S. (1971). J. Nutr. 101, 205.CrossRefGoogle Scholar
Cuthbertson, D. P. & Munro, H. N. (1939). Biochem. J. 33, 128.CrossRefGoogle Scholar
FAO/WHO (1962). Tech. Rep. Ser. Wld Hlth Org. no. 230.Google Scholar
FAO/WHO (1967). Tech. Rep. Ser. Wld Hlth Org. no. 362.Google Scholar
FAO/WHO (1970). Tech. Rep. Ser. Wld Hlth Org. no. 452.Google Scholar
FAO/WHO (1973). Tech. Rep. Ser. Wld Hlth Org. no. 522.Google Scholar
Gopalan, C. & Narasinga Rao, B. S. (1968). J. Nutr. 90, 213.CrossRefGoogle Scholar
Haldane, J. S. & Graham, J. I. (1935). Methods of Air Analysis. London: C. Griffin & Co.Google Scholar
Hawley, E. E., Murlin, J. R., Nassett, E. S. & Szymanski, T. A. (1948). J. Nutr. 36, 15.CrossRefGoogle Scholar
Hegsted, D. M. (1964). In Mammalian Protein Metabolism, p. 135 [Munro, H. N., editor]. London: Academic Press.CrossRefGoogle Scholar
Huang, P. C., Chong, H. E. & Rand, W. M. (1972). J. Nutr. 102, 1605.CrossRefGoogle Scholar
Leitch, I. & Duckworth, J. (1937). Nutr. Abstr. Rev. 7, 257.Google Scholar
McCance, R. A. & Walsham, C. M. (1949). Br. J. Nutr. 2, 26.CrossRefGoogle Scholar
Martin, C. J. & Robison, R. (1922). Biochem. J. 16, 407.CrossRefGoogle Scholar
Murlin, J. R., Edwards, L. E., Hawley, E. E. & Clark, L. C. (1946). J. Nutr. 31, 533.CrossRefGoogle Scholar
National Research Council (1961). Publs natn. Res. Coun., Wash. no. 843.Google Scholar
National Research Council (1968). Publs natn. Res. Coun., Wash. no. 1694.Google Scholar
Nicol, B. M. (1952). Br. J. Nutr. 6, 34.CrossRefGoogle Scholar
Nicol, B. M. (1959 a). Br. J. Nutr. 13, 293.CrossRefGoogle Scholar
Nicol, B. M. (1959 b). Br. J. Nutr. 13, 307.CrossRefGoogle Scholar
Nicol, B. M. (1970). Proc. R. Soc. Med. 63, 1177.Google Scholar
Payne, P. R. (1975). Am. J. clin. Nutr. 28, 281.CrossRefGoogle Scholar
Périssé, J., Sizaret, F. & François, P. (1969). F.A.O. nutr. Newsl. 7, no. 3, p. 1.Google Scholar
Peters, J. H. (1942). J. biol. Chem. 146, 179.CrossRefGoogle Scholar
Rippon, W. P. (1959). Br. J. Nutr. 13, 243.CrossRefGoogle Scholar
Scrimshaw, N. S., Hussein, M. A., Murray, E., Rand, W. M. & Young, V. R. (1972). J. Nutr. 102, 1595.CrossRefGoogle Scholar
Smuts, D. B. (1935). J. Nutr. 9, 403.CrossRefGoogle Scholar
Waterlow, J. C. (1968). Lancet ii, 1091.CrossRefGoogle Scholar