Insomnia Protocol

Sleep & CircadianStrong Evidence

supplements

Primary

Supporting

Grade A

Studies

Primary Stack

Core supplements with strongest evidence

MelatoninA

0.5-5mg before bed

Binds to MT1/MT2 receptors in suprachiasmatic nucleus to regulate circadian rhythm and promote sleep onset

↓Insomnia Signs and Symptoms↑Sleep Quality

35 studies2,240 participants

Supporting Studies (2)

PMID: 16394939 - Melatonin for treatment of sleep disorders (2005)PMID: 23691095 - Melatonin for primary insomnia: a meta-analysis (2013)

MagnesiumB

400-500mg before bed (glycinate form)

Activates GABA receptors, reduces cortisol, and regulates melatonin production through pineal gland modulation

Insomnia Signs and Symptoms↑Serum Magnesium↑Sleep Duration↓Sleep Latency↓Restless Leg Syndrome Symptoms

8 studies500 participants

Supporting Studies (2)

PMID: 12163983 - The effect of magnesium on sleep quality in elderly subjects (2002)PMID: 31609015 - Magnesium supplementation improves indicators of sleep (2019)

Supporting Stack

Additional supplements for enhanced results

GlycineB

3g before bed

Lowers core body temperature through peripheral vasodilation and enhances NMDA receptor function to improve sleep quality

3 studies145 participants

Supporting Studies (2)

PMID: 17284739 - Glycine ingestion improves subjective sleep quality (2007)PMID: 22293292 - The sleep-promoting and hypothermic effects of glycine (2012)

L-TheanineC

200mg before bed

Increases alpha brain wave activity and GABA production, promoting relaxation without sedation

4 studies170 participants

Supporting Studies (1)

PMID: 21075236 - L-Theanine partially counteracts caffeine-induced sleep disturbances (2011)

How This Protocol Works

Simple Explanation

Insomnia involves disruption of your natural sleep-wake cycle, often due to stress, irregular schedules, or age-related changes in sleep hormones. Your brain's ability to transition into sleep depends on proper melatonin signaling, reduced cortisol, and activation of calming GABA pathways.

•Melatonin directly signals to your brain that it's time to sleep. It works best for sleep onset insomnia and circadian rhythm disruptions. Lower doses (0.5-1mg) are often as effective as higher doses and reduce morning grogginess.

•Magnesium (glycinate or bisglycinate form) calms the nervous system by activating GABA receptors and helps your body produce melatonin naturally. Many adults are deficient, and correcting this can significantly improve sleep.

•Glycine works uniquely by lowering your core body temperature—a necessary step for falling asleep. It also improves sleep quality, helping you wake feeling more refreshed.

•L-Theanine promotes relaxing alpha brain waves without causing drowsiness. It's particularly helpful for those whose racing thoughts prevent sleep.

Expected timeline: Melatonin works from the first night. Magnesium and glycine show cumulative benefits over 2-4 weeks. Full sleep quality improvement typically occurs within 4-6 weeks.

Clinical Perspective

Insomnia pathophysiology involves hyperactivation of the hypothalamic-pituitary-adrenal axis, reduced GABAergic inhibition, disrupted circadian clock gene expression, and elevated core body temperature during sleep onset. This protocol addresses multiple sleep-regulating systems.

•Melatonin (A-grade): Binds MT1 receptors to promote sleep onset and MT2 receptors to shift circadian phase. Reduces sleep onset latency by 7-12 minutes. 35 RCTs with 2,240 participants show moderate improvement in sleep quality (PMID: 23691095). Start with 0.5mg; higher doses may cause morning sedation.

•Magnesium (B-grade): Potentiates GABA-A receptor activity. Reduces cortisol via HPA axis modulation. Enhances melatonin synthesis through N-acetyltransferase activation. 8 studies with 500 participants show improvements in ISI scores and sleep efficiency (PMID: 31609015).

•Glycine (B-grade): Acts on NMDA receptors in the suprachiasmatic nucleus. Induces peripheral vasodilation, lowering core body temperature by 0.25°C—a necessary thermoregulatory change for sleep onset. Increases slow-wave sleep time (PMID: 22293292).

•L-Theanine (C-grade): Crosses blood-brain barrier, increasing GABA, dopamine, and serotonin. Enhances alpha-wave activity (8-12 Hz) associated with relaxed wakefulness. Does not cause next-day drowsiness (PMID: 21075236).

Biomarker targets: Sleep latency, sleep efficiency, WASO (wake after sleep onset), subjective sleep quality scores.

Protocol notes: Take melatonin 30-60 min before bed in dim light. Magnesium glycinate preferred for sleep (glycine adds benefit). Avoid screens for 1 hour before bed.

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