How to Control Your Metabolism by Thyroid & Growth Hormone | Huberman Lab Podcast #17
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Episode Highlights
Thyroid Hormones
Thyroid hormones play a crucial role in regulating metabolism, impacting growth, repair, and energy consumption in the body. explains that metabolism involves the consumption of energy for tissue growth and repair, with the brain consuming a significant portion of metabolic energy 1. He emphasizes the importance of thyroid hormones in maintaining cognitive function and overall well-being 1. Additionally, healthy thyroid pathways enhance recovery from injuries by increasing glucose uptake in muscles and bones 2.
Metabolism isn't just about losing weight, but having a high metabolism, provided it's not too high, is great.
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Huberman also highlights the necessity of iodine, L-tyrosine, and selenium for optimal thyroid function, which supports energy metabolism and tissue repair 3.
Iodine's Role
Iodine is essential for thyroid health, influencing inflammation and energy metabolism. notes that iodine helps reduce C-reactive protein levels, which are linked to inflammation and various diseases 4. He explains that iodine, combined with L-tyrosine, is crucial for producing thyroid hormones T3 and T4, which are vital for maintaining a healthy metabolism 5.
Keeping C-reactive protein low and IL-6 low is important for brain health, cognitive function, and tissue repair.
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Huberman warns that certain diets, especially those lacking in iodine-rich foods, can lead to insufficient thyroid hormone production, affecting overall health 6.
Selenium Benefits
Selenium is another critical element in thyroid hormone production, offering additional health benefits. points out that selenium facilitates the interaction between L-tyrosine and iodine, essential for thyroid hormone synthesis 7. He mentions that many people might not consume enough selenium, which can be found in foods like Brazil nuts and certain fish 7.
Brazil nuts are the heavyweight champion of foods to get selenium from.
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Beyond thyroid health, selenium also reduces the risk of preeclampsia, prostate cancer, and acne, showcasing its broader health implications 8.