C57BL/6 mice were fed either a high protein (28%), standard protein (18%) (Panel A) or a low-protein (8%), low-protein with supplemented serine, valine or threonine (SVT) or low-protein supplemented with phenylalanine, tyrosine or tryptophan (PTT) diets (Panel B) for eight weeks. Neither the dietary protein content or AA supplements had any significant impact on body weight (measurements are expressed as the means ± SEM, n=10 mice/condition).