Foundational
Magnesium: 7 Forms Compared — Which One Do You Need?
Magnesium glycinate vs threonate vs taurate and 4 more forms compared. Dosing, deficiency signs, and why serum testing is unreliable. A physician's guide.
Longevity Medicine
Strong EvidenceSleep Science
Sleep architecture, circadian biology, and evidence-based optimization.
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02
How to Increase Deep Sleep Naturally: A Physician's Protocol
Evidence-based protocol to increase deep sleep and slow-wave sleep. Temperature, light, exercise timing, supplements, and what actually works according to sleep research.
03
How Much Deep Sleep and REM Do You Need? Sleep Architecture Explained
Physician guide to sleep stages, deep sleep and REM targets by age, and what your sleep tracker data actually means for longevity and cognitive health.
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Best Supplements for Deep Sleep: Evidence Ranked
Physician-ranked guide to sleep supplements. Magnesium glycinate, glycine, apigenin, L-theanine, and ashwagandha compared by evidence quality for deep sleep enhancement.
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DSIP Dosage and Protocol for Sleep
Evidence-based DSIP dosing guide for sleep. Subcutaneous protocols, timing, cycling, and realistic expectations from Dr. Julian Douwes.
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DSIP vs Melatonin: Which Sleep Peptide?
DSIP vs melatonin comparison by Dr. Julian Douwes. Sleep architecture modulation vs circadian timing — mechanisms, evidence levels, and when to use each.
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Magnesium Glycinate vs. L-Threonate: Which Form for Sleep, Anxiety, and Brain Health?
Physician comparison of magnesium glycinate vs magnesium L-threonate. Which form for sleep, which for cognition, absorption differences, dosing, and evidence quality.
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When to Take Magnesium: Morning vs. Night, With or Without Food
Physician guide to magnesium supplement timing. When to take glycinate, threonate, citrate, and other forms for maximum absorption and effect. Morning vs night, food interactions.
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Sleep Architecture and Longevity
How sleep stages affect aging, recovery, and healthspan. Optimization strategies grounded in evidence and clinical experience.
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Sleep Optimization Protocol
Evidence-based strategies for improving sleep quality -- environment, timing, supplements, and habits. By Dr. Julian Douwes.
