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STUDresearch · Non-peptide

Glycine

Also known as

Gly · L-glycine · aminoacetic acid · 2-aminoacetic acid · glycinate adjacency (Mg glycinate / bisglycinate salts — not gram-equivalent free glycine) · collagen amino acid · GlyNAC (glycine + NAC stack name) · free-form glycine powder · glycine monohydrate (bulk powder form shorthand)

Community talk. May be wrong. Not medical advice. Not a protocol. Not for human or animal use.

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Non-peptide Niche talk Systemic Oral Sleep & longevity staples

Systemic — oral free amino acid; sleep thermoregulation, collagen substrate, and glutathione-precursor goals are framed whole-body, not site-injected.

What people say Glycine is an amino acid people discuss for bedtime sleep, next-day refresh and collagen or GlyNAC stacks.Free glycine is not interchangeable with magnesium glycinate, collagen peptides or other similarly named compounds. Doses people talk about
Bedtime sleep discussion~3 g oral free glycine near bedtime

The amount repeated in community sleep charts and small sleep-study discussions; responses are mixed, not a guaranteed sleep effect.

Everyday consumer discussion~3–5 g orally per day

Inherited sleep/general-support discussion; not an additional amount on top of the bedtime row.

Collagen and connective-tissue discussion~10–20 g oral free glycine per day

Often split across the day; a different use case from sleep and from taking collagen peptides.

GlyNAC research context~100 mg/kg/day glycine plus ~100 mg/kg/day NAC orally

Weight-based older-adult study discussion over multi-week blocks; other fixed-dose and mmol-based charts differ. This is not free-glycine sleep dosing.

These are separate reported uses, not a dose ladder. Free glycine, collagen peptides, magnesium glycinate and combined GlyNAC totals are not gram-equivalent.

Half-life & effect duration

Half-life in the body
  • Oral · community estimateAbout 1–4 hours
  • Large IV / surgical-fluid loadsAbout 26–245 minutes, depending on amount
Felt duration people report
  • Positive sleep accountBetter sleep and next-day mellowness
  • Other accountWorse sleep
  • After stoppingA change after a couple of days in one account
Timing context & sources
How it may feel People describe mild calm, easier sleep or clearer mornings—or little change. Gut fullness, soft stool or daytime sleepiness can be more noticeable than a benefit.
Cycles people discuss Sleep use appears as nightly habits, short trial periods or an every-third-or-fourth-night add-on. Collagen and GlyNAC discussions use different multi-week blocks; breaks vary, and there is no standard washout for free-glycine sleep use. Timing Sleep discussions commonly place oral free glycine 30–60 minutes before bed. Daytime, split and pre-training routines appear for other goals; meal placement and the reasons for it vary. Stacks GlyNAC: Glycine + NAC (1:1 mg/kg or fixed 1:1 gram pairs; some sources use mmol-based unequal gram charts) — top longevity/metabolic/GSH stack name. Watch for GI (most common multi-gram complaint): Nausea, stomach discomfort, soft stools/diarrhea — more likely above ~15–20 g at once. Split dosing is discussed as a response, not a guaranteed fix.
Related
NACGlutathioneL-theanineApigeninMyo-inositol

Tap a line to jump into the full notes. Research only — may be wrong.

Timing context & sources

Half-life in the body

The existing community notes quote 1–4 hours; a dependable oral-supplement half-life was not established in this review.

The often-cited 26–245-minute study used large IV or surgical-fluid loads, not a bedtime oral supplement.

The consumer estimate remains identified as legacy discussion, not a new measurement. The oral-study abstract sought in this pass was not accessible; no universal claim of absent research is made.

  • Hahn: dose-dependent glycine half-life (opens in a new tab)1993 publisher Summary: large surgical-fluid absorption in 17 patients and IV infusions in 18 volunteers; apparent half-life 26–245 minutes.Summary only. Large IV/surgical loads do not establish ordinary oral supplement clearance; no oral half-life is measured in this experiment.

Felt duration people report

One person described better sleep and next-day mellowness; another reported worse sleep.

The first noticed a change after a couple of days without it. That does not establish a fixed effect window or glycine as the sole cause.

KSM-66 and omega-3 were also used in the original account; other commenters discuss magnesium glycinate, which is not interchangeable evidence.

  • Glycine experience — sleep and next-day accounts (opens in a new tab)Original post: improved sleep and next-day mellowness, change after running out; replies confirm swallowed capsules and KSM-66/omega-3 use. StimpyLockhart reports worse sleep.Individual reports; magnesium-glycinate replies describe a different product and are not treated as pure-glycine observations. Concurrent supplements confound attribution.

What people say 19

  • Restricted-sleep performance narrative: Same ~3 g pre-bed literature is used in podcasts/forums as “recover better from a short night” rather than as a hard insomnia cure. forum
  • Not knockout sedation: Users and researchers frame mild wind-down, cooler extremities, or “easier sleep,” not benzos-style amnesia, rebound, or next-day hangover. forum
  • Collagen / connective tissue: Multi-gram free glycine (often ~10–20 g/day talk) or collagen peptides discussed for joints, tendons, skin, and load-bearing recovery. forum
  • Recovery chatter: Less soreness or “softer tissue” logs — heavily confounded by sleep, protein, collagen peptides, vitamin C, and training load. forum
  • Skin adjacency: Glycine-rich collagen patterns and multi-ingredient skin stacks get more visible-skin credit than free glycine alone in community. forum
  • Skepticism / attribution: Many stacks credit glycine inside mag + theanine + apigenin or inside GlyNAC; isolating free glycine alone is hard in n=1 logs. forum
  • Subjective sleep quality: ~3 g oral before bed improved perceived sleep quality in small RCTs/crossovers (often n < 20; Inagawa 2006-style and Yamadera 2007-style Japanese sleep-lab work commonly cited). trial
  • Sleep onset / efficiency talk: Polysomnography-linked work reports modest latency/efficiency/REM shifts in some write-ups; total sleep time often little changed vs placebo. trial
  • Next-day alertness / less fatigue: Daytime sleepiness and fatigue scores improved after partial sleep restriction when 3 g was taken pre-bed (Bannai et al., Frontiers in Neurology 2012 is the usual citation). trial
  • Collagen AA math: Collagen hydrolysate is ~33% glycine residues / ~25% glycine by mass in cited work — so ~10 g hydrolysate ≈ ~2.5 g glycine content; community often approximates ~30 g collagen peptides ≈ ~10 g glycine-ish. Pure glycine is cheaper per glycine gram but lacks Pro/Hyp/full collagen AA profile. trial
  • Cell/ex vivo collagen synthesis push: de Paz-Lugo-style work argued higher free-glycine concentrations raise collagen synthesis more than typical hydrolysate-glycine yields — used in community as rationale for ~10 g free glycine targets. lab
  • GlyNAC aging markers (weight-based RCTs): Glycine + NAC at ~100 mg/kg/day each in older-adult Sekhar-line work associated with improved glutathione/redox, mitochondrial function toward younger ranges, insulin-resistance markers, gait speed, and other hallmark-adjacent endpoints over ~16 weeks in key RCT(s). trial
  • GlyNAC withdrawal signal: Open-label / follow-up discussion notes benefits can recede after ~12 weeks off GlyNAC — framed as ongoing need rather than permanent reset. trial
  • GlyNAC fixed-dose nuance: Larger short (2-week) fixed-dose RCT arms at 2.4 / 4.8 / 7.2 g total actives 1:1 glycine:NAC were safe/tolerated but did not raise GSH in the full healthy older cohort; post-hoc benefit suggested mainly in high-oxidative-stress / low-GSH subsets. trial
  • Mouse longevity (dietary glycine): Miller et al. Aging Cell 2019 — food supplemented with ~8% glycine produced small but significant median lifespan increases (~3.7% females / ~6.2% males in common summaries; ~4–6% band often quoted) plus max-lifespan signals — methionine-restriction / one-carbon talk, not human lifespan proof. animal
  • GlyNAC mouse lifespan lore: Separate GlyNAC mouse work is cited in longevity media for larger lifespan deltas than glycine-alone diet work — still animal, still not a human label claim. animal
  • Methionine / autophagy lore: Reviews argue glycine may lower effective methionine signaling and support autophagy/sarcosine pathways — mechanism essays more than dose charts. trial
  • Schizophrenia adjunct (clinical history only): High oral doses (~0.4–0.8 g/kg/day; some arms ~30–60 g/day) as antipsychotic add-on improved negative symptoms in some small trials (e.g. Heresco-Levy-style 0.8 g/kg work); mixed/null results elsewhere, poor CNS penetration at low dose, nausea at high dose, and clozapine co-use often non-helpful or adverse — not consumer sleep math. trial
  • Metabolic interest (mixed, population-specific): Glycine co-ingestion with glucose can blunt glucose AUC in some healthy-subject work; separate obesity work reported worsened glucose intolerance via enhanced hepatic gluconeogenesis — community guides often flag metabolic disease as a caution zone rather than a universal “insulin hack.” trial

Doses people talk about 24

  • Powder practical note: Community/vendor charts often equate ~3 g ≈ one rounded teaspoon or ~½ teaspoon depending on density/brand — scale preferred; bulk density and clumping vary. forum
  • Everyday consumer band: ~3–5 g/day common in sleep/general-support talk and consumer monographs. forum
  • Huberman-adjacent intermittent dose: ~2 g free glycine (often with ~100 mg GABA) every third or fourth night appears in sleep-stack summaries — lower and less frequent than the 3 g nightly trial pattern. forum
  • Higher sleep doses: ~5–10 g for sleep is discussed anecdotally; little evidence of added sleep benefit over ~3 g, and GI risk rises. forum
  • Collagen / connective community band: ~10–15 g/day free glycine widely cited; protocols and reviews also discuss ~10–20 g/day, sometimes split AM/PM or pre-training + evening. forum
  • Historical patent/protocol talk: Older glycine-for-connective-tissue write-ups set ~10 g/day as a working daily (often 5 g twice daily) with optional 15–20 g for tougher cases — consumer lore, not modern regulatory dosing. forum
  • Collagen peptides alternative: ~15–20 g hydrolyzed collagen per session often preferred when full collagen AA profile is the goal; pure glycine used when cost-per-glycine-gram matters. forum
  • Collagen timing lore: ~30–60 min before resistance/load-bearing work + vitamin C (~500 mg co-mentioned in consumer protocols) for incorporation talk. forum
  • Glutathione-support solo talk: ~2–5 g glycine/day (split or single), often with NAC 600–1,200 mg in consumer GSH stacks — distinct from full weight-based GlyNAC. forum
  • Combined sleep + GSH habit: e.g. ~3 g pre-bed + extra daytime grams for total multi-gram daily intake — common informal split. forum
  • GlyNAC community body-weight math: ~70 kg adult ≈ ~7 g glycine + ~7 g NAC/day at 100 mg/kg each (some popular calculators use ~7 g each; older blog math sometimes cites ~7 g glycine + ~9 g NAC under mmol conversions) — multi-gram powder territory; users often start lower. forum
  • Low-start consumer GlyNAC: Some commercial guides push ~600 mg each glycine + NAC as a cautious start — far below trial mg/kg loads. forum
  • Mag glycinate contribution math: A common ~200 mg elemental magnesium as glycinate/bisglycinate may deliver ~0.5–1.5 g glycine depending on product math; one cited estimate is ~1.4 g glycine per 200 mg elemental Mg — still short of a separate 3 g free-glycine sleep dose. forum
  • Lower-amount discussion: Some guides describe beginning around ~1–2 g to observe GI or alertness responses before a ~3 g nightly pattern. This is reported guide practice, not a validated titration step or a personal instruction. forum
  • Community GlyNAC ramp: Consumer protocols describe approximately half of a weight-based amount for about 1 week (e.g. ~50 mg/kg each), then increases over about 2 weeks. This preserves the reported ramp, not a universal label or recommended progression. forum
  • Uncertainty: Scoop density, clumped powder, label accuracy, and glycinate-salt math can shift real free-glycine intake. forum
  • Sleep trial dose (most-cited): ~3 g oral free glycine ~30–60 minutes before bed (write-ups cite both ~30 min and ~1 hour; Yamadera/Inagawa/Bannai-line work clusters on the 3 g figure). trial
  • Broad clinical/research span: Human literature spans roughly ~2–60+ g/day depending on indication; schizophrenia work and older safety notes cite multi-week loads; Healthline-style summaries mention up to ~90 g/day in some study contexts without serious events — still not a consumer target. trial
  • Dietary baseline: Typical diet often estimated ~1.5–3 g/day glycine (sometimes rounded ~2 g); endogenous synthesis adds more but may not cover full collagen/GSH demand narratives. trial
  • Framing: Discussed ranges only — not advice, not personalized dosing, not a prescription protocol. Hospital/psychiatry high-dose math is not consumer sleep powder use. forum
  • GlyNAC weight-based (Sekhar-style RCTs): ~100 mg/kg/day glycine + ~100 mg/kg/day NAC for multi-week blocks (e.g. ~16 weeks in key older-adult RCT; open-label 16–24 weeks also discussed; follow-up after stop reported). trial
  • GlyNAC fixed-dose RCT arms: 2.4 g, 4.8 g, or 7.2 g total actives/day as 1:1 glycine:NAC by weight (i.e. 1.2+1.2, 2.4+2.4, or 3.6+3.6 g), split morning + evening for 14 days. trial
  • Schizophrenia adjunct research band (context only): ~0.4–0.8 g/kg/day oral (tens of grams for adults; fixed ~30–60 g/day arms appear in tables) as antipsychotic add-on in historical RCTs — clinical supervision context, not sleep use. trial
  • GlyNAC mmol framing (Examine / trial-adjacent): Some write-ups map trial component math to ~100 mg/kg/day glycine and ~133 mg/kg/day NAC depending on how mmol/kg is converted — users should not mix “equal grams” and “equal mmol” charts without checking the source. trial

How it may feel 8

  • Night 1–3 (sleep): Mild calm, easier onset, warmer hands/feet or “cooler core” lore — or nothing noticeable. Multi-gram powder may cause GI fullness or soft stool. forum
  • First week (sleep goal): If it works, easier fall-asleep or better morning refresh often noted before any sense of “deeper architecture.” forum
  • Weeks 2–4 (sleep checkpoint): Common decision point vs magnesium, L-theanine, apigenin, myo-inositol, GABA, or hygiene-only; many keep ~3 g if mornings feel clearer. forum
  • Huberman intermittent pattern talk: Some podcast-adjacent users copy ~2 g glycine (± GABA) only every 3rd–4th night rather than nightly — personal protocol culture, not a trial schedule. forum
  • Months 2–3+ (collagen / longevity): Skin, joint, or connective goals framed as slow; confounded by training, vitamin C, total protein, and collagen peptides. forum
  • Nights 2–4 study-window lore: Classic sleep trials ran short blocks (a few nights); users often decide quickly whether mornings feel clearer. trial
  • Weeks 2–16 (GlyNAC windows): Aging/GSH goals are often lab- or function-marker driven more than a dramatic “on” feel; matches short fixed-dose (~2 week) and longer weight-based (~12–16 week, sometimes 24 week open-label) trial lengths. trial
  • After GlyNAC stop (~12 weeks off in study talk): Markers/benefits can drift back — users who chase labs often re-start rather than treat as permanent. trial

Cycles people discuss 9

  • Sleep default: Open-ended nightly use if benefit holds — nutrient-style habit, not a classic peptide blast/cruise. forum
  • Sleep trial block: ~1–4 weeks (or even a few nights in classic PSG studies) common before committing long-term. forum
  • Intermittent sleep add-on: Every 3rd–4th night glycine (± GABA) appears in podcast-stack culture alongside a more nightly mag/theanine/apigenin base. forum
  • Collagen / training pulses: Higher multi-gram phases sometimes tied to rehab, hypertrophy, or high-load blocks rather than year-round 15–20 g free glycine. forum
  • Time off: Informal — travel, GI rest, stack simplification, or “did it still matter?” tests; no standard washout for free glycine sleep use. forum
  • Restarts: Common before stressful weeks, travel, or sleep disruption; usually uneventful. forum
  • GlyNAC study-shaped blocks: Short ~2-week fixed-dose pilots vs ~12–16 week (sometimes 24 week open-label) weight-based older-adult trials; some users copy block length then pause and reassess markers/feel. trial
  • GlyNAC off-window signal: ~12 weeks withdrawal associated with loss/decrease of benefits in follow-up discussion — argues against one-and-done cycles if the goal is sustained markers. trial
  • Long-run gap: Multi-year high multi-gram pure-glycine longevity safety is thinner than short sleep RCTs and marketing imply. trial

Timing 9

  • Oral supplement estimate: Community summaries often repeat ~1–4 hours depending on dose, but the checked 26–245-minute study used large IV or surgical-fluid exposures and does not establish the half-life of an ordinary oral bedtime dose. forumtrial
  • Bedtime discussion: Sleep-trial and community notes place oral glycine 30–60 minutes before bed rather than morning-only for sleep goals. That timing is a reported study/practice context, not an interval established from a measured short oral plasma half-life. trialforum
  • Split dosing (high grams): Multi-gram collagen/GlyNAC discussions describe AM/PM or more divided use for GI comfort and repeated plasma-exposure goals. Short-half-life reasoning is community rationale, not an established oral clearance requirement. forum
  • Meals: Sleep dose often empty-stomach water/tea; collagen dose with or without food; some avoid stacking free glycine only with huge protein boluses out of AA-competition lore — practice mixed. forum
  • Not depot: These oral discussions do not concern a long-acting ester or vial depot. Regular oral use appears in ongoing-goal routines; this is reported practice, not a redosing requirement established by human elimination measurements. forum
  • Downstream vs plasma: Community notes describe an hours-scale blood-clearance estimate, which is not established here for ordinary oral use. Collagen remodeling, GSH pools and next-day alertness are discussed on separate timescales: days–weeks for feelings or labs, and months for connective-tissue goals. forum
  • Dose-dependent half-life: After large IV/irrigation-style loads, apparent t½ ranged ~26–245 minutes and rose with glycine amount (Hahn 1993 style; intracellular accumulation model) — cited in aging reviews. trial
  • Absorption / peak talk: Oral absorption is rapid; peak plasma commonly framed ~30–60 minutes post-dose. trial
  • Core-temp cascade lag: Thermoregulatory sleep effect is framed as SCN → vasodilation → core cooling around the sleep bout, not residual daytime sedation. trial

More on what it is 7

  • Why people use it: Cheap bulk powder for bedtime calm + next-day alertness, multi-gram collagen/connective-tissue talk, and GlyNAC longevity/redox stacks — one of the most searchable “supplement amino acids” outside gym protein. forum
  • Collagen mechanism talk: Diet often estimated ~1.5–3 g/day glycine + endogenous synthesis may undershoot multi-gram daily collagen demand narratives; free glycine or collagen peptides used to close the gap. forum
  • What it is: Smallest non-essential (often called conditionally essential under high collagen/GSH demand) amino acid; ~one-third of collagen residues by count / ~25% of collagen hydrolysate mass; CNS inhibitory transmitter and NMDA co-agonist at the glycine site; building block for glutathione, creatine, heme, and purines. trial
  • Sleep mechanism talk: Oral glycine → SCN NMDA co-agonism → peripheral vasodilation → slight core-temperature drop — framed as a sleep-onset thermoregulatory signal, not classic GABAergic hypnotic sedation. trial
  • GSH / GlyNAC mechanism talk: Glycine + cysteine (via NAC) are rate-limiting GSH precursors in aging talk; Sekhar-line RCTs are the main human driver of the stack name. trial
  • Evidence honesty: Small human sleep trials at ~3 g pre-bed are the cleanest free-glycine human signal; GlyNAC aging RCTs exist but differ by dose/duration/endpoint and lab; pure free-glycine human lifespan RCTs are absent (mouse dietary glycine lifespan work is animal only). trial
  • Not a drug / not these swaps: Not a prescription hypnotic, not a GH secretagogue, not a sleep-disorder cure, not interchangeable gram-for-gram with magnesium glycinate, TMG (trimethylglycine / betaine), DMG, or sarcosine. trial

Stacks 10

  • GlyNAC: Glycine + NAC (1:1 mg/kg or fixed 1:1 gram pairs; some sources use mmol-based unequal gram charts) — top longevity/metabolic/GSH stack name. forum
  • Sleep trio adjacency: Free glycine often added beside magnesium (glycinate/threonate/bisglycinate), L-theanine, and sometimes apigenin (Huberman-style non-melatonin sleep stack culture). forum
  • Huberman base vs add-on split: Common base quoted as mag threonate ~145 mg (or bisglycinate ~200–400 mg elemental ranges in secondary write-ups) + theanine ~100–400 mg + apigenin ~50 mg nightly; glycine ~2 g + GABA ~100 mg as intermittent add-ons in summaries. forum
  • Mag glycinate double-count caution: Users debate whether mag glycinate “already has enough glycine” — usually not equivalent to a separate 3 g free-glycine sleep dose (~0.5–1.5 g glycine typical from a standard mag-glycinate serving). forum
  • Collagen stack: Free glycine and/or collagen peptides + vitamin C + progressive loading/resistance work. forum
  • Evening amino calm: Glycine + taurine (and sometimes theanine) — attribution usually confounded. forum
  • Longevity box mates: Often near NMN/NR, creatine, spermidine, Ca-AKG; some take glycine at night “to buffer” methyl-donor stacks while TMG sits morning. forum
  • TMG (trimethylglycine / betaine) is not glycine: TMG donates methyl groups; free glycine is separate — community warns against name-confusion swaps. forum
  • Creatine adjacency: Shared one-carbon / creatine synthesis talk; stacking is common in longevity boxes but each has its own evidence base. forum
  • Hygiene co-credit: Fixed bedtime, dark/cool room, caffeine cutoffs, and load management often share credit with the powder. forum

Storage notes 2

  • Form and preparation boundary: The consumer discussion here concerns oral free-glycine powder or capsules. Historical IV and bladder-irrigation products are separate medical contexts. STUDresearch does not provide reconstitution, diluent volumes or syringe-unit charts; varied formulations and labels do not establish a universal preparation method. forum
  • Storage and handling discussion: Unopened powders or capsules are generally described as kept cool, dry and away from light according to their own product label. After-opening handling is product-specific, not a universal forum procedure. forum

Watch for 16

  • GI (most common multi-gram complaint): Nausea, stomach discomfort, soft stools/diarrhea — more likely above ~15–20 g at once. Split dosing is discussed as a response, not a guaranteed fix. forum
  • Mild GI at moderate doses: Even ~3–5 g can upset some users (bloating, loose stool) — start-low talk exists for a reason. forum
  • Daytime drowsiness if mistimed: Taking a sleep-oriented dose when alertness is needed can feel too calm/sleepy. forum
  • Taste / volume friction: Sweet but chalky at high grams; capsule count becomes impractical above a few grams. forum
  • Pregnancy / breastfeeding: High multi-gram supplemental safety data is limited; consumer monographs often advise avoiding high doses without clinician input. forum
  • Allergy (rare monographs): Rash/itching/swelling appear as rare allergic-reaction language on consumer drug monographs — not a common forum complaint. forum
  • Glycinate ≠ free glycine: Milligrams of glycine bound in magnesium glycinate do not replace a multi-gram free-form sleep or collagen protocol. forum
  • TMG / DMG / sarcosine name traps: Trimethylglycine (betaine), dimethylglycine, and sarcosine (N-methylglycine) are different molecules/jobs; swapping them for free glycine is a common search confusion. forum
  • Irrigation / TURP historical hazard: Large absorbed glycine irrigant loads linked to prolonged high plasma glycine and TURP-syndrome-type risk (hyponatremia/encephalopathy context) in surgical literature — not oral powder practice, but shows high-dose systemic load is not “free.” trial
  • Clozapine interaction caution: Glycine may reduce clozapine effectiveness or fail as add-on in schizophrenia co-use discussions; clinical sources advise against unsupervised stacking with clozapine. trial
  • High-dose psych adjunct tolerability: Nausea and other GI effects appear in high-dose schizophrenia trial tables; high oral loads also discussed as poorly CNS-penetrant relative to need. trial
  • Metabolic caveat: Obesity/insulin-resistance animal-human work reported glycine can worsen glucose intolerance via enhanced hepatic gluconeogenesis in some settings — guides often flag extra caution for metabolic disease rather than treating glycine as a universal glucose-flattener. trial
  • Stroke-mortality retrospective mention: At least one retrospective association discussion appears in reviews; causality not established as a consumer-dose warning banner — note as sparse epidemiology, not a proven risk from 3 g sleep use. trial
  • Psych meds / CNS context: Not a full interaction chart; high-dose NMDA-site activity is clinically relevant in psychiatry research, not a DIY indication. trial
  • Not unlimited because “natural”: Well-tolerated short-term at common sleep doses (and high doses in some clinical contexts without serious events) ≠ free high-dose multi-year safety for everyone. trial
  • High-dose organ / CNS toxicity talk: Reviews note very high exposures (e.g. >500 mg/kg body mass context) can induce renal/hepatic cytotoxic concerns and acute glutamate/neuronal toxicity risk in experimental framing — far above typical 3 g sleep use. trial

Updated: 2026-08-12

Evidence mix Mixed trial + community tags Full: every bullet (trial + community). Use Scan for a faster bro-science read.
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