Glycine
The thermoregulatory sleep trigger that lowers core body temperature to unlock deep sleep — while providing the primary structural amino acid for overnight collagen synthesis and glutathione production.
Primacy Research
What Glycine Does For You
Thermoregulatory Sleep Trigger
Lowers core body temperature via NMDA receptor activation in the suprachiasmatic nucleus, opening the physiological gate for deep slow-wave sleep onset without sedation.
Faster Entry to Deep Sleep
3,000 mg before bed shortened latency to slow-wave sleep and improved subjective sleep quality across three independent controlled trials (Inagawa 2006, Yamadera 2007, Bannai 2012).
Next-Day Cognitive Performance
Reduced daytime sleepiness and improved psychomotor vigilance reaction time the morning after supplementation — demonstrating overnight recovery translates to measurable daytime gains.
Glutathione Production Support
The rate-limiting amino acid for de novo glutathione (GSH) synthesis — your body’s master intracellular antioxidant. GlyNAC trials showed Glycine + NAC (GlyNAC) restores GSH levels depleted by aging, as part of a GlyNAC combination.
Structural Collagen Substrate
Constitutes every third residue in collagen, providing the primary building block for overnight connective tissue, neural extracellular matrix, and synaptic scaffold repair during growth hormone peaks.
Your Body Can’t Cool Down for Deep Sleep
Deep sleep requires a core temperature drop of roughly 1–1.5 degrees F. But stress, screens, and modern indoor environments keep your body running hot — while a chronic glycine deficit starves overnight repair of the substrates it needs most.
The Thermal Gate
Your brain can’t initiate deep sleep until core temperature drops — but stress, late-evening screen exposure, and heated indoor environments keep you running hot, blocking the physiological prerequisite for slow-wave sleep.
The Structural Deficit
Your body needs roughly 10–15 g of glycine daily but makes only about 3 g and gets 3–5 g from diet. The gap starves overnight collagen synthesis — degrading connective tissue, neural extracellular matrix, and the scaffolding that stabilizes synaptic connections.
The Antioxidant Bottleneck
Glutathione — your body’s master intracellular antioxidant — requires glycine as a building block. Without adequate glycine, glutathione synthesis is rate-limited, and overnight oxidative damage repair stalls.
How Glycine Works
Glycine operates through five distinct pathways — from thermoregulatory sleep signaling to structural repair and antioxidant defense. It doesn’t sedate you; it triggers the physiological conditions your body needs to initiate and sustain deep sleep.
BBB Crossing & SCN NMDA Activation
Oral glycine crosses the blood-brain barrier and binds to NMDA receptors on neurons in the suprachiasmatic nucleus (SCN) — the brain’s master circadian clock — triggering a thermoregulatory signaling cascade to the preoptic area of the hypothalamus.
Peripheral Vasodilation & Core Temperature Drop
SCN activation initiates peripheral vasodilation — blood flow increases to hands, feet, and skin surface. Heat radiates outward from the core, producing a measurable drop in core body temperature of approximately 0.1–0.2 degrees C. This is the critical physiological signal for sleep onset.
Glycine Receptor (GlyR) Inhibitory Tone
Glycine binds to strychnine-sensitive glycine receptors (GlyRs) — ligand-gated chloride channels densely expressed in the brainstem and spinal cord. Chloride influx hyperpolarizes neurons, reducing excitatory transmission and producing motor relaxation and CNS calming distinct from the GABA pathway.
Collagen Synthesis — Structural Repair Substrate
Glycine constitutes approximately 33% of all amino acid residues in collagen, occupying every third position in the obligate Gly-X-Y repeat. During sleep, growth hormone peaks and drives anabolic repair — glycine provides the substrate the body needs to produce collagen for connective tissue, neural extracellular matrix, and vascular integrity.
Glutathione Precursor & One-Carbon Metabolism
Glycine feeds two critical metabolic systems: it is the rate-limiting substrate for glutathione (GSH) synthesis — the master intracellular antioxidant — and participates in one-carbon metabolism via the glycine cleavage system and SHMT interconversion with serine, supporting methylation and nucleotide synthesis during overnight repair.
What the Research Shows
Glycine at 3,000 mg is backed by multiple controlled trials demonstrating improvements in sleep onset, sleep architecture, and next-day cognitive performance — the exact dose delivered in RESET.
Bannai, M., Kawai, N., Ono, K., Nakahara, K., & Murakami, N. (2012). The effects of glycine on subjective daytime performance in partially sleep-restricted healthy volunteers. Frontiers in Neurology, 3, 61.
Inagawa K, Hiraoka T, Kohda T, Yamadera W, Takahashi M (2006). Sleep and Biological Rhythms, 4(1):75–77. 3 g glycine before bed. Improved psychomotor vigilance reaction time the following morning.
Yamadera W, Inagawa K, Chiba S, Bannai M, Takahashi M, Nakayama K (2007). Sleep and Biological Rhythms, 5(2):126–131. Significant improvements in subjective sleep quality, ease of sleep onset, and reduced next-day sleepiness. 3 g glycine before bed.
Kumar P et al. (2023). The Journals of Gerontology: Series A, 78(1):75–89. GlyNAC trial: glycine + NAC restored glutathione, improved mitochondrial function, reduced oxidative stress, inflammation, and genomic damage. Benefits reversed within 12 weeks of stopping, consistent with a causal relationship. Glycine identified as rate-limiting for GSH synthesis in aging. Note: This study used glycine + N-acetylcysteine (NAC) combined. The glutathione restoration and oxidative stress benefits reflect the combination, not glycine alone. RESET provides glycine alongside S-Acetyl Glutathione, which addresses the cysteine/GSH component through a different mechanism.
Your Nightly Dose in RESET
Why this dose works: Three independent clinical trials all used exactly 3,000 mg glycine before bed and demonstrated statistically significant improvements in sleep onset, sleep architecture, and next-day performance. The dose is well below any safety concern — glycine has GRAS status, and the GlyNAC aging trials used approximately 7 g/day with no adverse effects. Endogenous synthesis provides only ~3 g/day, and dietary intake averages 3–5 g/day, but estimated biosynthetic demand is 10–15 g/day. RESET’s 3,000 mg meaningfully closes the 4–7 g/day deficit identified by Melendez-Hevia et al. (2009, Annals of Nutrition and Metabolism).
How Glycine Connects Across the System
Glycine doesn’t work in isolation. Inside the Primacy protocol, it sits at the intersection of six synergy pathways spanning both RESET and APEX — bridging sleep initiation, structural repair, antioxidant defense, and the circadian optimization loop.
Serine-Glycine Interconversion Axis
Glycine and L-Serine (1,500 mg) are interconverted by serine hydroxymethyltransferase (SHMT) — a bidirectional reaction that feeds one-carbon metabolism, supporting methylation and nucleotide synthesis during overnight repair. Providing both at high doses saturates the interconversion pathway and is designed to prevent either from becoming rate-limiting for neural tissue repair.
Dual Inhibitory Amino Acid Architecture
Glycine activates glycine receptors (GlyR) while Taurine (1,500 mg) supports GABA-A receptor activity — two parallel inhibitory channels providing broader neural calming without over-relying on a single receptor system. Add PharmaGABA® (direct supply), Lemon Balm (prevents GABA breakdown), and Magnolia Bark (amplifies GABA-A sensitivity), and RESET builds a four-layer inhibitory stack.
Dual Sleep-Onset Triggers
CherryPURE® provides natural melatonin — the circadian darkness signal. Glycine triggers the core temperature drop — the thermoregulatory sleep gate. These are two distinct physiological prerequisites for sleep onset, and RESET is designed to fire both simultaneously: the circadian signal and the thermal signal are intended to converge to accelerate deep sleep entry.
Glutathione System — Two-Direction Support
S-Acetyl Glutathione (300 mg) provides pre-formed, bioavailable glutathione that bypasses GI degradation. Glycine provides the rate-limiting precursor for de novo glutathione synthesis. Together they support glutathione status from two directions — exogenous supply and endogenous synthesis substrate — maximizing overnight oxidative damage repair.
BDNF → Structural Repair Cycle (Circadian)
APEX upregulates BDNF and drives synaptic remodeling during the day (CognatiQ®, Sabroxy®, Magtein®). Those new synaptic connections require structural consolidation during sleep — the neural extracellular matrix that stabilizes synapses is composed substantially of collagen-like molecules requiring glycine. RESET Glycine provides the primary building block for this overnight structural scaffold, making it a rate-limiting substrate for the APEX-RESET circadian optimization loop.
Key Takeaways
The Thermoregulatory Sleep Switch
Glycine doesn’t sedate you — it triggers a measurable drop in core body temperature via NMDA receptors in the suprachiasmatic nucleus, activating the physiological gate that initiates deep slow-wave sleep significantly faster (based on shortened SWS latency observed in Bannai et al. 2012).
The Exact Clinical Dose — Three Times Over
RESET delivers 3,000 mg glycine — the precise dose used in all three primary sleep trials (Bannai 2012, Inagawa 2006, Yamadera 2007). No extrapolation from different doses. No proprietary-blend ambiguity.
Five Mechanisms, One Molecule
Glycine operates across thermoregulation, inhibitory neurotransmission, collagen synthesis, glutathione production, and one-carbon metabolism — making it the most functionally diverse amino acid in the RESET formula.
The Overnight Bridge for Daytime Performance
APEX builds new synapses during the day; Glycine provides the structural substrates to consolidate them overnight. Without adequate glycine for collagen and ECM synthesis, BDNF-driven plasticity from the morning protocol loses durability. Glycine is a key substrate in the 24-hour cognitive architecture.
Frequently Asked Questions
What does glycine do for sleep?
Glycine triggers a core body temperature drop via NMDA receptors in the brain’s suprachiasmatic nucleus, initiating peripheral vasodilation. This thermoregulatory signal is a physiological prerequisite for deep sleep onset. Three controlled trials at 3,000 mg showed improved sleep quality, shorter sleep latency, and reduced next-day sleepiness.
How much glycine is in RESET?
RESET delivers 3,000 mg of pure glycine per serving — the exact dose used in all three primary sleep trials (Inagawa 2006, Yamadera 2007, Bannai 2012). An additional ~117 mg is released from the Albion Mg Bisglycinate chelate, bringing the effective total to approximately 3,117 mg.
Is glycine a sedative?
No. Glycine does not produce sedation or cognitive impairment. It works by triggering the body’s natural thermoregulatory sleep mechanism and by activating inhibitory glycine receptors (GlyRs) in the brainstem and spinal cord — producing calm and motor relaxation through a pathway distinct from GABA-based sedatives.
How does glycine support glutathione?
Glycine is the rate-limiting amino acid for de novo glutathione synthesis. The GlyNAC trial (Kumar et al. 2023) showed older adults had 72% lower glutathione than young adults, and supplementing glycine plus N-acetylcysteine fully restored glutathione to youthful levels. RESET pairs glycine with S-Acetyl Glutathione for two-direction glutathione support.
Can I get enough glycine from food alone?
Unlikely. Your body synthesizes only about 3 g/day and typical diets provide 3–5 g/day, but estimated biosynthetic demand is 10–15 g/day. RESET’s 3,000 mg meaningfully closes this 4–7 g/day deficit without requiring dramatic dietary changes.
When should I take glycine for sleep?
All three clinical trials administered 3,000 mg glycine before bedtime. RESET is formulated for evening use, delivering glycine alongside other sleep-supporting ingredients for a coordinated overnight recovery protocol.
References
- [1]Bannai, M., Kawai, N., Ono, K., Nakahara, K., & Murakami, N. (2012). The effects of glycine on subjective daytime performance in partially sleep-restricted healthy volunteers. Frontiers in Neurology, 3, 61.View
- [2]Kawai, N., Sakai, N., Okuro, M., Karakawa, S., Tsuneyoshi, Y., Kawasaki, N., Takeda, T., Bannai, M., & Nishi, S. (2015). The sleep-promoting and hypothermic effects of glycine are mediated by NMDA receptors in the suprachiasmatic nucleus. Neuropsychopharmacology, 40(6), 1405–1416.View
- [3]Inagawa, K., Hiraoka, T., Kohda, T., Yamadera, W., & Takahashi, M. (2006). Subjective effects of glycine ingestion before bedtime on sleep quality. Sleep and Biological Rhythms, 4(1), 75–77.View
- [4]Yamadera, W., Inagawa, K., Chiba, S., Bannai, M., Takahashi, M., & Nakayama, K. (2007). Glycine ingestion improves subjective sleep quality in human volunteers, correlating with polysomnographic changes. Sleep and Biological Rhythms, 5(2), 126–131.View
- [5]Kumar, P., Liu, C., Suliburk, J., Hsu, J. W., Muthupillai, R., Jahoor, F., Minard, C. G., Taffet, G. E., & Sekhar, R. V. (2023). Supplementing glycine and N-acetylcysteine (GlyNAC) in older adults improves glutathione deficiency, oxidative stress, mitochondrial dysfunction, inflammation, physical function, and aging hallmarks. The Journals of Gerontology: Series A, 78(1), 75–89.View
Upgrade Your Recovery Architecture
Glycine is one of 25 active ingredients in RESET, engineered to work as a system — not a stack of standalone compounds.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.