NON-ESSENTIAL AMINO ACIDS ARE SYNTHESIZED IN THE BODY BUT ESSENTIAL AMINO ACIDS BEING NOT SYNTHESIZED, MUST BE SUPPLIED EXOGENOUSLY. IT HAS BEEN AN ACCEPTED RULE IN NUTRITION THAT ESSENTIAL AND NON-ESSENTIAL AMINO ACIDS MUST BE PRESENT IN OPTIMUM RATIO FOR AMINO ACIDS TO BE UTILIZED FOR SYNTHESIS OF TISSUE PROTEINS. THERE ARE ORAL AND PARENTERAL AMINO ACID PREPARATIONS. INTRAVENOUS AMINO ACID PREPARATIONS ARE INDICATED IN.