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In this Huberman Lab Essentials episode, Dr. Andrew Huberman interviews Dr. Kyle Gillett, a dual board-certified physician in family medicine and obesity medicine, about optimizing hormone health across the lifespan. (02:42) Dr. Gillett outlines his "Big Six Lifestyle Pillars" for hormone optimization, which include diet, exercise, stress management, sleep, sunlight exposure, and spiritual health. (03:08) The conversation covers practical strategies for both men and women, addressing common concerns about testosterone, growth hormone, sleep quality, and various health conditions like PCOS. They also discuss the risks and benefits of hormone replacement therapy, peptides, and other interventions, emphasizing the importance of individualized approaches to hormone health.
Professor of neurobiology and ophthalmology at Stanford School of Medicine and host of the Huberman Lab podcast. He is known for translating complex neuroscience research into practical tools for optimizing mental and physical health.
Dual board-certified physician in family medicine and obesity medicine with expertise in hormone optimization. He specializes in helping patients improve their hormone levels through behavioral, nutritional, and exercise-based interventions, with extensive knowledge in testosterone replacement therapy, peptides, and metabolic health.
Dr. Gillett emphasizes that sustainable hormone optimization comes from consistent application of six fundamental pillars: diet, exercise, stress management, sleep, sunlight exposure, and spiritual health. (02:42) The key insight is that "doing a little amount of what I call lifestyle interventions over a long period of time is going to be far more helpful or efficacious than doing a lot and then doing nothing." This approach follows the law of diminishing returns, where modest but consistent efforts yield better results than extreme but unsustainable interventions. The two strongest pillars are diet (particularly caloric restriction for those with metabolic syndrome) and exercise (especially resistance training).
The relationship between caloric restriction and testosterone depends entirely on your baseline health status. (08:13) Dr. Gillett explains that if you're obese or have metabolic syndrome, caloric restriction will improve your testosterone levels. However, for young, healthy individuals without metabolic dysfunction, caloric restriction will likely decrease testosterone. This highlights the importance of understanding your metabolic health before implementing dietary interventions, and why blanket recommendations don't work for hormone optimization.
Poor sleep quality, particularly waking up at 3-4 AM, can be linked to three major hormonal issues. (11:12) First is growth hormone deficiency, which directly impacts sleep architecture. Second are vasomotor symptoms during menopause or andropause, where declining sex hormones disrupt sleep patterns. Third, paradoxically, is when men begin testosterone replacement therapy (TRT), which can cause sleep apnea and put them in a "hypersympathetic state" due to overactive androgen receptors after periods of being hypogonadal.
Getting comprehensive hormone testing requires strategic communication with healthcare providers. (01:21) Dr. Gillett recommends focusing on functional complaints rather than just wanting to know numbers: "My energy is not as good as it used to be. My focus is not as good as it used to be. My athletic performance is not as good as it used to be." This approach provides medical justification for testing beyond simple curiosity. For optimal results, get tested every 3-6 months, including both fasting and non-fasting blood work to capture different metabolic states.
Dr. Gillett describes prolactin and dopamine regulation using the metaphor of a wave pool - if you increase dopamine too much, it will overflow and crash, leading to elevated prolactin. (26:24) High prolactin inhibits testosterone release from the pituitary, so maintaining steady dopamine levels is crucial. Practical strategies include eliminating foods that can increase prolactin, such as casein (milk protein) and gluten, which act as mu-opioid receptor agonists in the gut. This represents a concrete way to optimize hormone balance through dietary modifications.