Blog
Late eating vs poor sleep: which drives worse glucose?
Late eating vs poor sleep glucose effects compared: learn which pattern raises fasting glucose, CGM spikes, metabolic aging risk, and what to fix first.
Sleep regularity vs sleep duration: which matters more for longevity?
Compare sleep regularity vs sleep duration for longevity, mortality risk, HRV, and recovery. Learn which sleep pattern to fix first and how to track it.
Social jet lag vs sleep debt: which ages recovery faster?
Compare social jet lag vs sleep debt for recovery, HRV, metabolism, and sleep timing. Learn which pattern to fix first and how to track it.
Sleep stages by age: How REM, deep, and light sleep change as you get older
Discover how sleep architecture shifts with age, what percentage of deep and REM sleep is normal, and science-backed strategies to protect your sleep quality.
Normal sleep duration by age: how much sleep you actually need (chart)
Complete chart of recommended sleep hours by age from newborn to 65+. Learn how sleep needs change, what happens when you get too little, and how to optimize.
Sleep and longevity: the complete science-based guide
How sleep affects biological aging, lifespan, and healthspan. A comprehensive guide covering sleep stages, the U-curve of sleep duration, circadian biology, and evidence-based optimization strategies.
Chronotypes and longevity: Are night owls really dying sooner?
Learn how chronotype, sleep timing, and social jetlag affect longevity risk, why night owls are not doomed, and how to align sleep, light, and recovery.
Sleep debt: Can you actually pay it back? What science says
Is sleep debt real, and can you catch up on lost sleep? Learn what current research says about recovery sleep, weekend catch-up, health risk, and timing.
Endogenous melatonin: Why your body's own sleep hormone matters more than any pill
How endogenous melatonin supports circadian timing, sleep and aging biology, plus evidence-informed ways to protect natural nighttime production.