A method and composition for preserving muscle mass and function by increasing muscle protein synthesis and/or decreasing muscle protein degradation in mammals is disclosed. In one embodiment, the mammals are administered a protein building composition comprising at least two of an essential amino acid, an amino acid derivative, and a nitrogenous organic acid. In a particular embodiment, the protein building composition comprises leucine, L-carnitine, and creatine. The protein building composition can decrease TNF-α and increase mTOR expression in muscle.
本发明公开了一种通过增加哺乳动物肌肉蛋白质合成和/或减少肌肉蛋白质降解来保持肌肉质量和功能的方法和组合物。在一个实施方案中,哺乳动物服用一种蛋白质合成组合物,该组合物包含至少两种必需
氨基酸、
氨基酸衍
生物和含氮有机酸。在一个特定的实施方案中,蛋白质构建组合物包括亮
氨酸、
左旋肉碱和
肌酸。蛋白质构建组合物可以降低 TNF-α,增加肌肉中 mTOR 的表达。