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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Which amino acid released from muscles is an impoant substrate for gluconeogenesis?
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The correct answer is  In the fasting state, there is a considerable output of alanine from skeletal muscle, far in excess of its concentration in the muscle proteins that are being catabolized. It is formed by transamination of pyruvate produced by glycolysis of muscle is a substrate for gluconeogenesis by the glucose-alanine cycle Ref: Harper 28th edition, chapter 20.