Muscle Protein Synthesis and Amino Acid Turnover in Muscle and the Brain

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The activation of M-tore signals muscle protein synthesis, especially when combined with protein intake and exercise. Around 300 grams of amino acids are utilized daily, with the majority being recycled endogenous amino acids. The turnover of muscle takes between 50 and 100 days, meaning every muscle in the body is completely renewed every two to three months. In contrast, the turnover of brain proteins occurs more rapidly within about 30 days, implying that the amino acids in the brain are constantly being replaced.

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In this quarterly podcast summary (QPS) episode, Peter introduces a new format aimed at summarizing his biggest takeaways from the last three months of guest interviews on the podcast. Peter shares key insights from each episode, covering diverse topics such as protein and muscle building with Luc van Loon, toe strength with Courtney Conley, VO2 max with Olav Aleksander Bu, liquid biopsies for cancer with Alex Aravanis, gut health and probiotics with Colleen Cutcliffe, and road safety with Mark Rosekind. Additionally, Peter shares any personal behavioral adjustments or modifications to his patient care practices that have arisen from these engaging discussions.

If you’re not a subscriber and are listening on a podcast player, you’ll only be able to hear a preview of the AMA. If you’re a subscriber, you can now listen to this full episode on your private RSS feed or our website at the episode #304 show notes page. If you are not a subscriber, you can learn more about the subscriber benefits here.

We discuss:

How Peter keeps track of his takeaways from each podcast episode [5:15];
Luc van Loon episode: fat utilization, muscle protein synthesis, dietary protein, aging and inactivity, and more [8:45];
Behavioral changes that have come about from the conversation with Luc van Loon [23:45];
Courtney Conley episode: importance of toe strength and the impact of dedicated foot training [26:45];
Olav Aleksander Bu episode: the importance of VO2 max for lifespan, and the practicalities of measuring and improving VO2 max [36:45];
Behavioral changes that have come about from the conversation with Olav [56:00];
Alex Aravanis episode: liquid biopsies for cancer detection [1:01:30];
Colleen Cutcliffe episode: the importance of gut bacteria balance, and the potential therapeutic uses of probiotics, particularly Akkermansia [1:16:45];
Mark Rosekind: the significant issue of road fatalities and injuries, their causes, and practical safety measures to reduce risks [1:27:00]; and
More.

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