QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Calloway, D. H. Articles by Spector, H. Search for Related Content PubMed PubMed Citation Articles by Calloway, D. H. Articles by Spector, H.

Nitrogen Utilization During Caloric Restriction

II. The Effect of Variation in Nitrogen Intake¹

One Figure

Quartermaster Food and Container Institute for the Armed Forces, Chicago, Illinois

Diets supplying graded amounts of egg albumin nitrogen, zero to 604 mg per day, were fed to normal adult rats limited to 50% of caloric requirement for 4 days. Nitrogen utilization was measured by nitrogen balance and by alteration in liver nitrogen content.

The degree of negative nitrogen balance was inversely proportional to nitrogen intake but positive balance was not attained. Nitrogen utilization diminished as the level of dietary nitrogen increased from 52 to 61% at 70 to 80 mg daily to 17% at 604 mg, indicating increased use of dietary protein for energy. Supplying half the caloric requirement reduced the nitrogen deficit 32 to 39% as compared with fasting and the addition of dietary nitrogen produced up to 87% sparing beyond that of the calories alone.

There was no significant correlation between liver nitrogen loss and nitrogen balance.

Manuscript received 14 February 1955.