All-Vegetable Protein Mixtures for Human Feeding

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Abstract
The effect of 3 per cent torula yeast as a protein supplement to INCAP Vegetable Mixture 9 was studied by growth experiments in rats and nitrogen balance studies in children. For the rats fed at a 10 per cent level of protein, torula yeast augmented growth, feed efficiency and protein efficiency. This effect could be duplicated by adding an amount of lysine equivalent to that contained in the yeast. At 15 and 20 per cent protein levels this effect is no longer observed. The nitrogen balance results in children failed to show any significant effect of 3 per cent torula yeast in INCAP Vegetable Mixture 9 fed at levels of 2 and 1 gm. of protein per kg. per day.