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American Journal of Clinical Nutrition, Vol 26, 503-509, Copyright © 1973 by The American Society for Clinical Nutrition, Inc.

Comparative utilization of fish protein concentrate and casein—lactalbumin by college women

Ruth E. Tucker Ph.D.1, Henry A. Dymsza Ph.D.1, Spiros M. Constantinides Ph.D.1, and Phyllis T. Brown M.S.1

1 From the Department of Food and Nutritional Science, College of Home Economics, University of Rhode Island, Kingston, Rhode Island 02881

A 37-day metabolic study was conducted with 11 female college students as subjects to compare the utilization of fish protein concentrate (FPC) with a standard casein-lactalbumin (CL) protein. Both proteins were adjusted to the FAO pattern with crystalline essential amino acids. A mixture of nonessential amino acids in the pattern found in bovine milk provided the nonessential amino acid nitrogen.

The basal diet was a liquid formula into which the test proteins were incorporated. The daily protein intake was 0.4 g/kg body wt. The individual caloric intakes were adjusted by use of low protein cookies and a carbonated beverage. The results of the analyses of the fasting blood samples taken at the beginning and at the end of the study indicated no significant changes in the overall condition of the subjects.

The parameters used to determine utilization were nitrogen balance, urea nitrogen, and ammonia nitrogen. No significant differences were found in these, thereby indicating that under the conditions of this study the nitrogen in FPC was as well utilized as the nitrogen in the standard protein, CL.






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Copyright © 1973 by The American Society for Nutrition