#45 - AMA #4: sleep, jet lag protocol, autophagy, metformin, and more
In this AMA, Peter Attia and Bob Kaplan discuss strategies for optimizing sleep, including the use of blue light blockers, managing adenosine levels by avoiding caffeine and being active, and the importance of low evening cortisol. The episode previews topics like jet lag, PMS, and autophagy.
Deep Dive Analysis
6 Topic Outline
Discussion on blue light blocking glasses
How blue light blockers improve sleep quality
The role of adenosine in sleep regulation
Understanding the cortisol cycle and its impact on sleep
Melatonin's function as a sleep-inducing hormone
Minimizing jet lag and sleep disruption while traveling
3 Key Concepts
Adenosine
Adenosine is a molecule that accumulates in the body with increased energy expenditure, signaling a growing need for sleep. High levels of adenosine are desirable for sleep, and caffeine works by reducing these levels, thus promoting wakefulness.
Cortisol Cycle
Cortisol, a stress hormone, follows a circadian rhythm. Ideally, its levels should be low upon waking and before bed, with a significant surge occurring within the first two hours after waking. Low cortisol at night is crucial for optimal sleep.
Melatonin
Melatonin is a hormone secreted by the pineal gland primarily in the absence of light, especially blue light. It acts as a signal to the brain that it's dark, effectively removing the 'brakes' that keep one awake and facilitating the onset of sleep.
4 Questions Answered
Blue light blocking glasses, such as the Gunnar brand Peter uses, filter out blue light from electronic screens. This is important because melatonin, a hormone that signals darkness to the brain and helps initiate sleep, is secreted in the absence of blue light.
Sleep is a balancing act influenced by adenosine, cortisol, and melatonin. For optimal sleep, you want high adenosine levels, low cortisol, and rising melatonin.
Caffeine works by lowering adenosine levels. Adenosine is a molecule that builds up the more energy you expend and signals the body's need for sleep, so by reducing it, caffeine keeps you awake.
Ideally, cortisol levels should be low when you wake up and when you go to bed, with a significant surge occurring in the first two hours after waking. Low cortisol at night is essential for sleep.
6 Actionable Insights
1. Block Blue Light for Sleep
Wear blue-blocking glasses once the sun goes down when looking at electronics, especially computers, to improve sleep quality. Alternatively, use phone settings to render the screen red or gray, or use software like f.lux on laptops to reduce blue light.
2. Increase Adenosine for Sleep
Ensure high adenosine levels before sleep by avoiding caffeine and being physically active throughout the day. High adenosine is crucial for promoting sleep.
3. Lower Cortisol Before Sleep
Aim to have low cortisol levels before going to bed, as a low cortisol level is a desired state for optimal sleep.
4. Boost Melatonin Naturally
Facilitate the natural rise of melatonin by ensuring the absence of light, specifically blue light, in the evening. Melatonin signals darkness to the brain, which helps remove the ‘brakes’ of staying awake.
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3 Key Quotes
The main issue is if you can remember to do so putting these on once the sun goes down, as you're looking at electronics, huge difference, especially for computer.
Peter Attia
I kind of view the glasses as an insurance policy.
Peter Attia
Melatonin is basically removes the brakes of staying awake.
Peter Attia