STUDresearch · Non-peptide
Agmatine
Also known as
agmatine sulfate · decarboxylated arginine · AGM · agmatine 1g · GDA agmatine talk
Community talk. May be wrong. Not medical advice. Not a protocol. Not for human or animal use.
Non-peptide
Some talk
Systemic
Oral
Cognitive / nootropic peptides
Systemic oral arginine metabolite (not a peptide).
What people say
An arginine-derived non-peptide, usually discussed as oral agmatine sulfate. Gym-pump posts sit beside pain, mood and stimulant-tolerance experiments; those are different goals, not one proven effect or one dose pattern.
Doses people talk about
Oral sulfate/powder/capsule context, not a protocol. Amounts in proprietary pre-workout blends may be unclear. Animal-conversion bands remain separate from human-use reports.
How it may feel
Some describe fuller pumps, calmer anxiety or pain improvement; others feel little, develop GI upset or feel emotionally flat. Stimulant blunting can be the reason for using it or quitting, and individual reports include next-day changes.
Pre-workout reports500–1000 mg per lifting-day use
About 20–30 min before lifting, often empty-stomach; the pump/BP overlap matters when stacked.
Nootropic / tolerance reports250–500 mg per reported use
Sometimes intermittent; an evening 4×/week pattern appears in the notes. Stimulant effects may instead feel blunted.
Higher pain-log amounts~1.5–2.7 g/day, split
Original daily band; the separate two-author 2.67 g/day case used morning/evening portions after meals and is not population safety evidence.
Half-life & effect duration
- Half-life in the body
- Human case-report estimateAbout 2 hours; disputed
- Oral · ratsAbout 74–117 minutes
- IV · ratsAbout 15–19 minutes
- Felt duration people report
- Anxiety reliefAbout 3 hours in one account, then anxiety returned
- Flattened moodAbout 10 hours, with another change around 24 hours in one account
- Other accountsNo such mood flattening
Cycles people discuss
Lift-day use, daily pain-log amounts and 4 evenings/week for stimulant-tolerance experiments are different patterns. Some stop when a tub runs out or pause to judge blunting; a universal 6-week cycle is not established.
Timing
Pump notes place use about 20–30 min before lifting, often empty-stomach. Higher-gram logs describe morning/evening portions after meals for tolerability context; neither pattern is a human half-life calculation.
Stacks
Citrulline pump stacks carry faint/BP concerns; caffeine can feel enhanced or blunted. PEA here means the pain-related lipid, not phenethylamine. Solo 500 mg reports aim to separate headache attribution.
Watch for
BP drop / faint stacked with other pump drugs or tadalafil.
Tap a line to jump into the full notes. Research only — may be wrong.
Timing context & sources
Half-life in the body
A dependable human plasma half-life was not established here.
The case report states an apparent blood half-life of ~2 h, citing a human urinary-clearance study. The accessible cited abstract does not provide a plasma elimination curve, so this review cannot confirm that estimate as measured human plasma PK.
ACS full text was inaccessible. This review does not disprove the apparent estimate, but cannot certify it as a measured human plasma half-life.
- Huisman et al. 2010: Novel ELISAs using whole urine samples (opens in a new tab)Abstract: healthy-individual urinary clearance after oral intake; assay-development endpoints.Actual PubMed abstract reviewed; ACS full-text link returned an error. Abstract does not supply a human plasma concentration-time half-life; full experimental details were not available.
- Gilad & Gilad 2014: Long-Term High Daily Dosage of Dietary Agmatine, case report (opens in a new tab)Printed pp.1256–1257: abstract, Participant Information, Study Intervention, findings; introduction’s apparent 2 h statement and reference 5.Actual four-page PDF text, especially first two pages, reviewed. Two authors self-monitored their own product; uncontrolled and commercially conflicted. Introductory PK shorthand cites a urinary assay paper, not a new plasma measurement.
Half-life in the body
74.4–117 min oral plasma half-life in rats.
The same study reports shorter IV plasma values, 14.9–18.9 min, and suggests absorption-limited oral kinetics. CNS tissue persistence is a separate endpoint.
Not a human supplement clock or a redosing interval; abstract/figure-caption review, not full methods.
- Clements et al. 2023: Biodistribution of Agmatine to Brain and Spinal Cord (opens in a new tab)Abstract and Figure 2 legend: rat plasma IV and oral half-lives, oral bioavailability and CNS/plasma distinction.Actual PubMed abstract/figure captions reviewed; PMC full text returned a browser-check page. Rat data, not a human supplement half-life; tissue persistence is not measured subjective benefit.
Felt duration people report
Some hours-long relief reports coexist with longer flattening or rebound accounts.
One post describes about 3 h of anxiety relief with anxiety returning; another describes ~10 h of flattening and a change around 24 h. Other replies report no such anhedonia. Pump onset at 20–30 min is a separate old discussion claim.
Different endpoints cannot form a typical 3–24 h range. Repeat dosing, stimulants and other co-use confound interpretation; no recommended repeat interval follows.
- Agmatine cures my anxiety for 3 hours (opens in a new tab)Deleted-account OP: 1 g, about 3 h relief, anxiety returning and second 1 g; visible replies.Actual public OP and replies reviewed. Self-reported oral-use context with repeated dosing, unverified formulation and no controlled diagnosis or offset testing. The request for a redosing schedule is not endorsed.
- Agmatine is the WORST noot I tried EVER (opens in a new tab)OutrageousBit2164 OP: acute flattening for ~10 h, sleep complaints, rebound ~24 h; Majestic-Living-4417 reply without anhedonia and PolyHydroCynical favorable reply.Actual OP and visible replies reviewed. Variable doses and stimulant/other-compound context; opposing reports do not establish frequency or a pharmacologic rebound mechanism.
What people say
- Pumps: 500–1000 mg 20–30 min pre-workout on an empty stomach is the copied pre-workout band. forum
- Neuropathy / chronic-pain n=1s: Higher daily grams (Gilad-style ~2.6 g split) get named in long-term self-logs. Thin formal human work. anecdote
- Stimulant-tolerance lore: 250–500 mg evenings, 4×/week, is described as a way to “undull Adderall/caffeine.” Other accounts instead report blunting the buzz they wanted; the threads do not quantify either camp. forum
- Mood / focus: Mixed. Some nootropic posts like it; some call it emotionally flat. forum
- 5-year high-dose case report: ~2.67 g/day split; the two authors followed their own use for 4–5 years. They reported stable health/lab measures, with pre-existing exceptions described—not a population safety program. trial
Doses people talk about
- Pre-workout: 500–1000 mg, ~20–30 min before lifting, often empty-stomach. forum
- Nootropic / stim-tolerance: 250–500 mg, sometimes not every day. forum
- Quoted conversion band: ~1.6–6.4 mg/kg for “cognition” is an animal-to-human scaling argument, not a tested human dose. At the low end, the amount for an 80 kg person is much smaller than a 1 g scoop; numerical scaling does not establish equivalent effects. forumanimal
- Start low if stacking NO boosters — the faint/pump overlap. forum
- Pain-log high: ~1.5–2.7 g/day split (Gilad 2.67 g case). trial
- Framing: Supplement milligrams — not a prescription. forum
How it may feel
- First pre-workout: Fuller pump or GI and a drop in BP. forum
- Days 1–14 nootropic: Subtle or nothing in the existing notes; people expecting racetam-sparkle quit. A separate reviewed anxiety account describes about 3 h of calm followed by returning anxiety, not a general nootropic duration. forum
- If it blunts stims: They notice the same week — either the point or the reason they stop. forum
- Weeks to months pain logs: Slow if anything, like PEA, not a ketamine-class mute. forum
- Stop / rebound reports: The existing no-classic-withdrawal account and fading pump/blunting description are retained, but are not universal. A reviewed report instead describes acute flattening for the first ~10 h and a better-feeling rebound around 24 h; other users do not report that pattern. forum
Cycles people discuss
- Lift-day pulses vs daily pain grams are different patterns. forum
- Stim-tolerance: 4 evenings/week shows up so weekends still hit. forum
- Not a 6-week blast for most; tubs just run out. forum
- Drop it before a stim experiment if you need to know whether agmatine is the blunting. forum
Timing
- Two clocks: The old “hours, not a long ARB tail” phrase and 20–30 min pre-workout pump timing are community shorthand, not human PK. Rat plasma half-lives were 14.9–18.9 min IV and 74.4–117 min oral. The case report states an apparent blood half-life of ~2 h, citing a human urinary-clearance study. The accessible cited abstract does not provide a plasma elimination curve, so this review cannot confirm that estimate as measured human plasma PK. forumanimaltrial
- Split high grams: The Gilad report used ~2.67 g/day in morning/evening portions after meals. The older ~2.6 g “gut bomb” explanation is GI-management lore; it is not a reason demonstrated by that two-person report or a half-life-derived schedule. trialforum
- Empty-stomach ritual for pumps; with meals for high-dose GI. forum
- Not arginine’s 30-gram first-pass story. forum
More on what it is
- Why people talk about it: Pre-workout pump posts *and* r/Nootropics nerve-pain / stimulant-tolerance posts. Same powder, two cultures. forum
- How it works (plain): Forum shorthand: eNOS-ish pump, NMDA modulation for pain/mood, and “resets stim tolerance.” Human mechanism is thinner than the labels. forum
- Examine-style cognitive conversion lore: The existing 10–40 mg/kg animal → roughly 1.6–6.4 mg/kg human calculation is retained as a quoted scaling argument, not an established human cognitive dose or evidence of equivalent effects. It is not how gym tubs are scooped. forumanimal
- Sulfate vs HCl: Sulfate is the default tub. People argue water weight vs actual agmatine. forum
- Not arginine / not citrulline grams. Milligrams, different job, sometimes stacked anyway. forum
- What it is: Decarboxylated arginine, usually sold as agmatine sulfate 500–1000 mg caps. Gut bacteria also make some. Not a peptide. trial
Stacks
- + Citrulline: Pump stack. Two NO-adjacent things, more faint risk. forum
- + Caffeine: Either synergy or the blunting fight. forum
- + PEA (the lipid) for pain: Different mechanisms, same “slow neuromodulator” drawer. forum
- Solo 500 mg first if the job is “is this the headache.” forum
Storage notes
- Powder or caps. No BAC water. Dry, because sulfate cakes. forum
- Check the pre-workout label — 250 mg hidden in a blend is not the 1 g tub. forum
Watch for
- GI / nausea at gram doses. forum
- BP drop / faint stacked with other pump drugs or tadalafil. forum
- Blunts stims / euphoria — feature or bug. forum
- Emotional flattening in a minority of nootropic posts. forum
- Herpes/arginine lore sometimes gets pasted on agmatine; it is not the same gram-dose arginine story. forum
- Hidden blend doses. forum
Evidence mix
Mostly community / anecdote tags
Full: every bullet (trial + community). Use Scan for a faster bro-science read.