The Protein Requirements of College Women on High Cereal Diets with Observations on the Adequacy of Short Balance Periods ,
- 1 February 1949
- journal article
- research article
- Published by Elsevier in Journal of Nutrition
- Vol. 37 (2), 163-183
- https://doi.org/10.1093/jn/37.2.163
Abstract
Ten college girls, 19 to 30 years of age, cooperated in a study of the protein needs of adults. During an experimental period of 105 days, divided into 4 periods, the following were determined: (1) nitrogen balances on a low protein diet; (2) individual protein needs for nitrogen equilibrium and estimated “adult growth” needs when subjects received a diet in which 70% of the protein was of cereal origin; and (3) adequacy over a 10-week period of these estimated protein needs for maintenance of nitrogen equilibrium and physical well-being (as indicated by three psychomotor tests, 5 tests of preceptual and intellective function, and one test of physical endurance). The results were as follows: It may be concluded from these studies: (1) that for diets of the type used, containing predominant proportions of cereal proteins, the average daily requirement for adult maintenance and growth is 31.7 ± 1.6 gm per person or 25 gm per 1000 cal. of basal heat; and (2) that the protein requirements computed from experimental periods of such length that the urinary nitrogen attains a relatively constant level are valid for periods of at least 70 days.Keywords
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