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Effects of Variations in Dietary Protein on the Physical Well Being of Men Doing Manual Work¹

The Fatigue Laboratory, Harvard University, Soldiers’ Field, Boston, Massachusetts

1. Within 2 months no measurable influence either deleterious or beneficial could be observed on the physical vigor or efficiency of eight healthy young men subsisting on a diet adequate in calories but restricted in protein. The daily protein intake averaged 50 to 55 gm., very little of which was of animal origin.

2. Similarly no beneficial or harmful effect could be observed in 2 months on eight men subsisting on a diet providing 160 gm. or more of protein, mostly first class.

Manuscript received 27 May 1944.

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