Nitrogen retention of adult human subjects fed a high protein rice

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Abstract
A high protein rice, BPI-76-1, was compared in adult human subjects with an equal weight of rice of the commercially available Bluebonnet variety at a daily intake of 480 g. The BPI-76-1 rice, which contained 1.8 times as much protein as Bluebonnet rice, caused significantly higher (P < 0.01) nitrogen retention, which is attributable to the increased amounts of essential amino acids. The respective mean positive balances were 1.41 ± 8.89 g and 0.24 ± 0.31 g. Addition of supplementary nitrogen to make the Bluebonnet rice isonitrogenous with the BPI-76-1 variety did not cause a statistically significant improvement. All subjects were in negative balance when 320 g Bluebonnet rice were made isonitrogenous with 480 g of the same rice by adding nonspecific nitrogen.