40. The Science of Sleep (Part 2)

In this episode, we dive deep into the science of sleep, what's actually happening in your body, why so many of us are getting it wrong, and the simple (free) changes that can transform your rest. From melatonin and adenosine to caffeine timing, alcohol, evening routines, and when supplements are actually worth reaching for, this is your comprehensive guide to optimizing one of the most underrated pillars of health.

5 Key Takeaways

• Morning light is everything. Getting sunlight in your eyes early in the morning helps regulate melatonin production and sets your circadian rhythm for the whole day — it's one of the highest-leverage habits you can build.
• Wait 30–60 minutes before your morning coffee. Drinking caffeine immediately after waking traps leftover adenosine molecules, which leads to an energy crash later. Let your body clear them first.
• Blue light tricks your brain into thinking it's daytime. Screens emit blue light that mimics UV light, suppressing melatonin production. Reducing screen exposure after 6 PM — or using Night Shift mode and blue light glasses — can meaningfully improve sleep onset.
• Alcohol disrupts your REM sleep more than you think. Even a small amount suppresses deep sleep, causes more nighttime waking, and throws off hunger hormones and cortisol — making it harder to make good choices the next day.
• Sleep hygiene comes before supplements, every time. A consistent bedtime, a wind-down routine, exercise, limited alcohol, and reduced screen time are your first line of defense. Supplements like magnesium or melatonin are tools for specific situations — not nightly crutches.

"Sleep is like the lowest hanging fruit with the biggest bang for your buck." - AJ

Connect with Emily and AJ

Website: https://www.emilylevercoaching.com/

Instagram: https://www.instagram.com/bedellever/

References

https://link.springer.com/article/10.1186/s44410-025-00011-9

https://pubmed.ncbi.nlm.nih.gov/31377851/

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Until next time—keep showing up, stay consistent, and remember: small steps add up to big change.