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Essential amino acid levels change in multiple biological matrices following consumption of amino acid-modified diets. (A) The abundance of essential amino acids in each of the study diets is shown. (B) The relative levels of essential amino acids in the liver, serum and feces from mice fed a reduced protein (RP) or reduced NEAA (RN) diet compared to mice given a control diet (CL) are shown (* p < 0.05; ** p < 0.01; *** p < 0.001).
