ModerateCaution
L-Citrulline
Both affect nitric oxide or vascular pathways, but agmatine may modulate nitric oxide synthase unpredictably.
Recommendation: Start separately and monitor blood pressure, headache, and dizziness.
Agmatine Sulfate
Amino Acid ·Insufficient evidence ·Reviewed May 2026
Agmatine sulfate is an arginine-derived compound marketed for pre-workout pumps, pain modulation, and mood support. Human evidence for bodybuilding or nitric-oxide effects is very limited, and most mechanistic claims come from animal or in vitro work. It should be considered an experimental supplement with uncertain long-term safety.
What it's good for
What to watch for
- Nausea or diarrhea
- Dizziness
- Headache
- Pregnancy and breastfeeding due to insufficient safety data
- Use with blood pressure, psychiatric, or glucose-lowering medications without clinician guidance
The bottom line
Evidence rating insufficient. Most-documented uses: may modulate pain signaling in limited studies, may influence vascular tone and perceived pump, may support stress or mood pathways in preclinical research. 3 sources indexed (2003–2013), with 3 interaction records on file.
The science
How it works, mechanistically.
Core mechanism
Agmatine interacts with imidazoline receptors, alpha-2 adrenergic signaling, NMDA receptor activity, and nitric oxide synthase isoforms. It may modulate pain signaling and vascular tone, but the direction of nitric-oxide effects is context-dependent rather than simply pro-NO. Limited human data exist for neuropathic or radicular pain, not for muscle pump or hypertrophy outcomes.2,1
Class
Arginine metabolite and imidazoline receptor modulator
Found in food
Fermented foods contain small variable amounts, Some alcoholic beverages contain trace agmatine, Gut microbiota can produce agmatine
Low-status signs
None - agmatine is not an essential nutrient and has no deficiency state
Absorption
Best on an empty stomach
Dosing
Dosing & protocol.
Common range
500-1,500 mg/day is common in supplements; higher pain-study doses require clinician review
Recommended form
Agmatine sulfate capsule or powder from third-party-tested product
Often taken away from protein or amino acid-heavy meals because transporter competition is theoretical. GI tolerance varies.
Forms
Forms & what to buy.
Ranked by evidence and value.
Agmatine Sulfate Powder Recommended
Allows effective dosing but taste can be unpleasant. Take away from large amino acid doses if tolerated.
Agmatine Sulfate Capsules
Convenient and easier to dose accurately. Take with water.
Pre-Workout Blend with Agmatine
Often underdosed and mixed with stimulants. Check all stimulant and vasodilator ingredients.
Cost
What it actually costs.
Real-world pricing across three quality tiers. Assumes Agmatine sulfate powder.
BudgetBest value
$5 /mo
$0.15 per dose
Mid
$12 /mo
$0.40 per dose
Premium
$27 /mo
$0.90 per dose
Single-ingredient powders are cheaper and more transparent than proprietary blends. Updated 2026-06-04.
Goals
Goal-based dosing.
Experimental Pump Support
Dose: 500-1,000 mg pre-workout
Timing: 30-60 minutes pre-workout
Evidence for pump is weak; stop if dizziness or headaches occur.
Pain Modulation Support
Dose: Clinician-directed dosing only1
Timing: Daily as studied
Human pain data do not justify self-treating serious pain.
Low-Stimulant Pre-Workout
Dose: 500-1,000 mg1
Timing: Pre-workout
Keep expectations conservative and avoid stacking many experimental agents.
Why people use it
Symptoms it's matched to.
Where this appears in the symptom-to-supplement map, ranked by relevance.
Neuropathic pain
32% relevance
Limited human pain trial suggests neuromodulatory potential.1
NeurologicEmerging evidenceClinician-reviewed capsule
Do not self-treat serious pain.
Stimulant-sensitive pre-workout needs
25% relevance
Non-stimulant but experimental pre-workout ingredient.1
AthleticInsufficient evidencePowder
Effect expectations should be conservative.
Low workout pump
22% relevance
May influence vascular tone, but direct human pump evidence is lacking.1
AthleticInsufficient evidenceSingle-ingredient agmatine
Use more established nitric oxide supports first.
Safety
Full safety detail.
Side effects
- Nausea or diarrhea
- Dizziness
- Headache
- Possible blood pressure changes
- Possible glucose changes
- Unknown long-term safety at high doses
Contraindications
- Pregnancy and breastfeeding due to insufficient safety data
- Use with blood pressure, psychiatric, or glucose-lowering medications without clinician guidance
- Severe kidney or liver disease
- Avoid combining with multiple experimental pre-workout agents3
Interactions
Interaction records.
InfoSynergy
Taurine
Both are non-stimulant pre-workout or neuromodulatory ingredients, but direct synergy evidence is limited.
Recommendation: Use standard doses and avoid adding multiple new agents at once.
ModerateCaution
Berberine
Both may affect glucose and blood pressure in susceptible users.
Recommendation: Monitor glucose and dizziness if combining.
Sources
Sources, by evidence tier.
Numbered references. Citations throughout the page link here.
Randomized controlled trials
1- 1Agmatine sulfate in chronic lumbar disc-associated radiculopathy: a randomized, double-blind, placebo-controlled trialNeeds sourceNo linkKeynan O et al. · Pain Medicine · 2010
Agmatine sulfate improved pain-related outcomes in a radiculopathy study, but this does not establish pre-workout efficacy.
Reviews & position papers
2- 2Agmatine: clinical applications after 100 years in translationNeeds sourceNo linkPiletz JE et al. · Drug Discovery Today · 2013
Review summarizes diverse agmatine mechanisms and early clinical research.
- 3Agmatine, an endogenous modulator of multiple molecular targets: potential therapeutic applicationsNeeds sourceNo linkReis DJ et al. · Annals of the New York Academy of Sciences · 2003
Agmatine modulates several receptor systems and nitric oxide synthase rather than acting as a simple arginine booster.
Keep exploring
Deep dives & adjacent profiles.
This page is educational. Do not start, stop, or change a supplement or medication based on it without checking with a qualified healthcare professional.
Use this with your stack
Agmatine Sulfate in NutriStack.
Add it to your stack, see how it interacts with everything else you take, and get a Stack Score that updates the moment it does.