supplementOTC supplementSold in the US as an over-the-counter dietary supplement; not FDA-approved as a drug for any conditionHuman efficacy evidence is limited to a single small open-label pilot study; the remaining cited literature addresses toxicology and safety rather than efficacy
Agmatine SulfateBenefits, Dosage & Interactions
Agmatine sulfate is a compound derived from the amino acid L-arginine through a process called decarboxylation. It is naturally occurring in various organisms, including humans, where it acts as a neuromodulator and neurotransmitter. Research on Agmatine Sulfate focuses on cognition and mood and endurance.
How much Agmatine Sulfate do people take?
The human small-fiber neuropathy pilot used oral agmatine sulfate around 2.67 g per day; the rat safety study tested high oral dosages up to roughly 500 mg/kg/day without observed harm. Route reported: Oral, in capsule form in the human pilot study. Frequency reported: Divided daily dosing in the human pilot; daily gavage dosing in the rat safety study. These are amounts documented in the cited studies and labels for Agmatine Sulfate — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
See the full reported protocol and its sourcesResearched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.
Evidence: Limited — Human observational or case data only — no randomized trials.
Evidence strengthLimited · 2/4
PreclinicalStrong human evidence
Human observational or case data only — no randomized trials.
Plasma half-life
Not applicable
Typical timing
before training
Food rule
on an empty stomach
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- The human small-fiber neuropathy pilot used oral agmatine sulfate around 2.67 g per day; the rat safety study tested high oral dosages up to roughly 500 mg/kg/day without observed harm[1][2][3]
Reported for Agmatine Sulfate in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Agmatine Sulfate entry is written from. Each number matches an inline marker above.
- [1]Evidence for Dietary Agmatine Sulfate Effectiveness in Neuropathies Associated with Painful Small Fiber NeuropathyRosenberg ML, Tohidi V, Sherwood K, Gorelick D, Kalava A, Chao ST · Nutrients · 2020 · Peer-reviewed · PMID 32102167
- [2]Evidence for safety of the dietary ingredient agmatine sulfate as assessed by mutagenicity and genotoxicity testingGilad VH, Halperin R, Chen-Levy Z, Gilad GM · Toxicology Reports · 2024 · Peer-reviewed · PMID 39286406
- [3]Evidence for oral agmatine sulfate safety--a 95-day high dosage pilot study with ratsGilad GM, Gilad VH · Food and Chemical Toxicology · 2013 · Peer-reviewed · PMID 24140462
References & Evidence
Sources on this page that document Agmatine Sulfate dosing, timing and safety.
- [1]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Agmatine Sulfate studied for?
What is Agmatine Sulfate?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Agmatine sulfate is a compound derived from the amino acid L-arginine through a process called decarboxylation. It is naturally occurring in various organisms, including humans, where it acts as a neuromodulator and neurotransmitter. Agmatine was first discovered in the early 20th century, but its physiological roles were not fully elucidated until much later. As a supplement, it is often marketed for its potential in nitric oxide regulation, pain management, and neurological support. It is distinct from L-arginine, despite its origin, and possesses its own unique set of biological activities. (Refer to PubChem for chemical structure and basic properties).
What does the research say about Agmatine Sulfate?
Tap a section to expand.
Agmatine's mechanisms of action are diverse and involve several biochemical pathways. One primary mechanism involves its interaction with nitric oxide (NO) synthase (NOS). Agmatine selectively inhibits inducible nitric oxide synthase (iNOS) while potentially modulating endothelial nitric oxide synthase (eNOS). This differential effect can influence the overall nitric oxide balance within the body, which is crucial for vascular health and blood flow. (As noted by DrugBank).
Additionally, agmatine acts as an agonist at imidazoline receptors (I1, I2, and I3), which are involved in blood pressure regulation and pain control. It also functions as a modulator of N-methyl-D-aspartate (NMDA) receptors, which play a critical role in learning, memory, and pain perception in the central nervous system. By modulating NMDA receptor activity, agmatine may exert neuroprotective effects and influence pain signaling. (Information supported by PubChem and various pharmacological studies).
Furthermore, agmatine has been shown to interact with alpha-2 adrenergic receptors and certain serotonin receptors, contributing to its broad spectrum of neuromodulatory effects. It can also inhibit some polyamine metabolizing enzymes, which indirectly affects cellular growth and differentiation. The interplay of these various mechanisms contributes to the reported effects of agmatine in different physiological systems.
Source for this section: Sources for How does Agmatine Sulfate work?: Jumps to this entry in the sources and references list at the end of the page.
Agmatine sulfate is studied for several potential benefits, primarily related to its roles in neurotransmission, nitric oxide regulation, and pain modulation.
* **Nitric Oxide Regulation:** Agmatine's ability to modulate nitric oxide synthase activity has led to interest in its potential effects on cardiovascular function and exercise performance. By influencing NO levels, it may contribute to vasodilation, which could support blood flow. (Studies referenced by Examine.com).
* **Pain Management:** Research suggests agmatine may have analgesic properties, potentially by modulating NMDA receptors and imidazoline receptors in the central nervous system. This could lead to a reduction in certain types of pain perception. (As described in several pharmacological reviews).
* **Neurological Support:** Due to its activity at various neurotransmitter receptors, including NMDA and imidazoline receptors, agmatine is being investigated for its potential neuroprotective effects and its role in cognitive functions. It may support brain health and neuronal function. (Evidence from preclinical studies frequently cited by PubChem).
* **Mood Regulation:** Some preliminary findings indicate that agmatine may play a role in mood regulation, possibly through its interactions with various neurotransmitter systems. This area is still under active investigation.
* **Endurance:** The influence of agmatine on nitric oxide production and blood flow is sometimes theorized to support endurance activity, though direct human evidence specifically linking agmatine supplementation to significant endurance improvements is still emerging. (Observed in supplement marketing, but requires more rigorous clinical validation).
Research on agmatine sulfate has primarily been conducted in preclinical models, with a growing number of human studies exploring its effects. For its role in nitric oxide regulation, studies using isolated tissues and animal models have demonstrated agmatine's ability to selectively inhibit iNOS. While this has implications for vascular function, human intervention studies directly linking agmatine supplementation to significant improvements in blood flow or exercise performance are still developing. (Insights from Examine.com).
Regarding pain management, several animal studies have indicated agmatine's ability to reduce pain responses in models of neuropathic and inflammatory pain. Some small-scale human trials have also begun to investigate its potential in chronic pain conditions, with preliminary results suggesting a possible benefit, though larger, more robust clinical trials are needed to confirm these findings. (Reviewed in scientific articles available via PubMed).
For neurological support and mood regulation, early research, predominantly in animal models, points toward agmatine's neuroprotective and antidepressant-like effects. These studies highlight its interaction with various neurotransmitter systems. Human studies in these areas are more limited and require extensive further investigation to establish clinical relevance. (As reported by various pharmacology journals).
It is important to note that much of the available evidence is still exploratory, and the full extent of agmatine's benefits in humans, particularly for conditions like endurance, requires more extensive, well-designed clinical trials. The National Institutes of Health (NIH) continues to fund research on compounds like agmatine to better understand their therapeutic potential.
Agmatine sulfate is generally considered well-tolerated at commonly studied dosages, but some individuals may experience side effects. The most frequently reported side effects are gastrointestinal in nature. These can include:
* Nausea
* Vomiting
* Diarrhea
* Stomach discomfort or upset
These gastrointestinal issues are often mild and can sometimes be mitigated by taking the supplement with food, though agmatine is typically recommended on an empty stomach for absorption. Less commonly, some individuals might experience mild dizziness or headache. While rare, more severe reactions could theoretically occur, especially at very high dosages, given its broad neuromodulatory effects. Any persistent or severe side effects should prompt discontinuation and consultation with a healthcare professional. (Information based on observational data reported in studies and user experiences). This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Individuals with pre-existing medical conditions should exercise caution when considering agmatine sulfate supplementation. Due to its impact on nitric oxide systems and blood pressure regulation, those with cardiovascular conditions, especially hypotension (low blood pressure), should consult a licensed clinician. Similarly, individuals taking medications for blood pressure should seek medical advice before use, as agmatine could potentially interact. Given its influence on neurotransmitter systems, individuals with neurological or psychiatric disorders, or those taking related medications, must consult a clinician. Pregnant or breastfeeding individuals should avoid agmatine sulfate due to a lack of sufficient safety data in these populations. Always adhere to recommended dosages, as excessive intake may increase the risk of side effects. (General cautions based on pharmacological principles and lack of extensive safety data). This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Absolute contraindications for agmatine sulfate are not extensively established, largely due to ongoing research and limited large-scale human safety data. However, based on its known mechanisms of action, certain populations and conditions warrant avoidance or strict medical supervision:
* **Pregnancy and Breastfeeding:** Lack of sufficient safety data in pregnant or lactating individuals makes agmatine sulfate contraindicated. The potential effects on fetal development or infant health are unknown. (General guidance for supplements lacking specific safety data).
* **Severe Hypotension:** Individuals with severely low blood pressure or conditions predisposing them to hypotension should avoid agmatine due to its potential cardiovascular effects, including vasodilation. (Based on mechanistic understanding).
* **Known Allergy or Hypersensitivity:** As with any supplement, individuals with a known allergy or hypersensitivity to agmatine or any inactive ingredients in its formulation should avoid use. (Standard medical precaution).
Always discuss your full medical history with a licensed clinician to determine if agmatine sulfate is appropriate for your individual health status. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Agmatine sulfate has the potential to interact with several types of medications and supplements due to its wide range of physiological activities. Caution should be exercised when combining it with:
* **Blood Pressure Medications:** Given agmatine's potential to influence nitric oxide and imidazoline receptors, it might affect blood pressure. Combining it with antihypertensive medications could theoretically lead to an additive hypotensive effect, causing blood pressure to drop too low. (Pharmacological interaction noted by DrugBank).
* **NMDA Receptor Modulators:** Agmatine modulates NMDA receptor activity. Therefore, combining it with other substances that affect NMDA receptors (e.g., certain antidepressants, anesthetics, or recreational drugs) could lead to unpredictable or exaggerated effects. (Mechanism-based concern).
* **CNS Depressants:** Due to its neuromodulatory effects, there is a theoretical concern that agmatine could potentially enhance the effects of central nervous system depressants, though this interaction is not well-documented. (Precautionary principle).
* **L-Arginine Supplements:** While agmatine is derived from L-arginine, it inhibits certain NOS enzymes. There is a theoretical concern about potential counteracting effects or an altered balance if taken together, though more research is needed. (Biochemical pathway consideration).
Always consult a healthcare professional before combining agmatine sulfate with any other medications or supplements to prevent potential interactions. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Agmatine sulfate is commonly studied at various times, often targeting specific physiological effects. For general supplementation, some protocols suggest taking it once or twice daily. When used in the context of endurance or athletic performance, it is frequently taken approximately 15-30 minutes before a workout or exercise session to coincide with potential peak absorption and activity, given its approximate half-life of 3 hours. Individual needs vary — talk to a licensed clinician. Some users prefer to take it on an empty stomach to optimize absorption, as food can sometimes slow the uptake of certain compounds. However, if gastrointestinal discomfort occurs, taking it with a small amount of food might be considered, though this could alter its absorption profile. Consistency in timing, once established, may be beneficial for maintaining steady-state levels of the compound. (Based on common practices in supplement use and pharmacokinetic considerations).
Source for this section: Sources for When should you take Agmatine Sulfate?: Jumps to this entry in the sources and references list at the end of the page.
Put it into practice
Reading about Agmatine Sulfate is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.
What interacts with Agmatine Sulfate?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any glp1 + supplement | Note | Category ruleConfidence: theoretical | GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pending | Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider. |
| Any supplement + medication | Note | Category ruleConfidence: theoretical | Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pending | Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist. |
Frequently asked questions about Agmatine Sulfate
Agmatine sulfate is a decarboxylated derivative of the amino acid L-arginine. It is found naturally in the body and acts as a neuromodulator and neurotransmitter, involved in various physiological processes including nitric oxide regulation and pain modulation. It is often used as a dietary supplement.
Agmatine sulfate works through multiple mechanisms. It specifically inhibits inducible nitric oxide synthase (iNOS), modulates NMDA receptors, and interacts with imidazoline and alpha-2 adrenergic receptors. These actions contribute to its roles in blood pressure regulation, pain perception, and nervous system function.
Common side effects of agmatine sulfate are primarily gastrointestinal, including nausea, vomiting, diarrhea, and stomach upset. These are usually mild and may be dose-dependent. Less common side effects can include dizziness or headache. Always consult a healthcare professional if you experience persistent or severe side effects.
Agmatine Sulfate is crucial to consult a licensed clinician before combining agmatine sulfate with other medications. It may interact with blood pressure medications, NMDA receptor modulators, and potentially CNS depressants due to its broad physiological effects. Your clinician can assess potential interactions based on your specific health profile and medications.
Interaction risk for Agmatine Sulfate comes from the rest of the stack: other supplements, prescription medicines, hormone therapy and peptides. Because Agmatine Sulfate is usually taken before training, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Agmatine Sulfate with no sign-up.
Agmatine Sulfate is typically taken before training. Published protocols usually have it taken on an empty stomach. Published ranges differ between studies and formulations — the dose to use is the one on your label or from your clinician.
There is no single answer for Agmatine Sulfate plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Pairing Agmatine Sulfate with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Agmatine Sulfate varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken before training. Most protocols have it taken on an empty stomach. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Agmatine Sulfate depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Agmatine Sulfate the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
The human small-fiber neuropathy pilot used oral agmatine sulfate around 2.67 g per day; the rat safety study tested high oral dosages up to roughly 500 mg/kg/day without observed harm. Route reported: Oral, in capsule form in the human pilot study. Frequency reported: Divided daily dosing in the human pilot; daily gavage dosing in the rat safety study. These are amounts documented in the cited studies and labels for Agmatine Sulfate — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
Which studies looked at Agmatine Sulfate?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Evidence for Dietary Agmatine Sulfate Effectiveness in Neuropathies Associated with Painful Small Fiber Neuropathy. A Pilot Open-Label Consecutive Case Series Study(opens PubMed in a new tab)Nutrients · 2020 · PMID 32102167 · https://pubmed.ncbi.nlm.nih.gov/32102167/
- 2.Safety and Efficacy of Dietary Agmatine Sulfate in Lumbar Disc-associated Radiculopathy. An Open-label, Dose-escalating Study Followed by a Randomized, Double-blind, Placebo-controlled Trial(opens PubMed in a new tab)Pain Med · 2010 · PMID 20447305 · https://pubmed.ncbi.nlm.nih.gov/20447305/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- PubChem CID 2794990(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/2794990
Verify at
Publisher search links for Agmatine Sulfate. These are places to check the information — they are not citations, so they are not numbered.
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- Mayo Clinic(publisher search, opens in a new tab)Mayo Clinic · publisher search
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Agmatine Sulfate?
Plain-text summary, safe to quote verbatim:
Agmatine sulfate is a compound derived from the amino acid L-arginine through a process called decarboxylation. It is naturally occurring in various organisms, including humans, where it acts as a neuromodulator and neurotransmitter. Research on Agmatine Sulfate focuses on cognition and mood and endurance.
Source: DoseRoutine — https://doseroutine.com/library/agmatine-sulfate
Agmatine Sulfate cheat sheet
DoseRoutine cheat sheet · Supplement
Agmatine Sulfate
Agmatine sulfate is a compound derived from the amino acid L-arginine through a process called decarboxylation. It is naturally occurring in various organisms, including humans, where it acts as a neuromodulator and neurotransmitter.
Evidence
Limited
Human observational or case data only — no randomized trials.
Studied range
The human small-fiber neuropathy pilot used oral agmatine sulfate around 2.67 g per day; the rat safety study tested high oral dosages up to roughly 500 mg/kg/day without observed harm
Route
Oral, in capsule form in the human pilot study
Frequency studied
Divided daily dosing in the human pilot; daily gavage dosing in the rat safety study
Half-life
Not established in these sources
Timing
before training
With food
on an empty stomach
OTC supplementSold in the US as an over-the-counter dietary supplement; not FDA-approved as a drug for any conditionHuman efficacy evidence is limited to a single small open-label pilot study; the remaining cited literature addresses toxicology and safety rather than efficacyBrainEndurance
Key references
- Evidence for Dietary Agmatine Sulfate Effectiveness in Neuropathies Associated with Painful Small Fiber Neuropathy (2020)
- Evidence for safety of the dietary ingredient agmatine sulfate as assessed by mutagenicity and genotoxicity testing (2024)
- Evidence for oral agmatine sulfate safety--a 95-day high dosage pilot study with rats (2013)
Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/agmatine-sulfate
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Agmatine Sulfate — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/agmatine-sulfate
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