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Head-to-head evidence comparison — which supplement is right for you?
Agmatine vs Probiotics: Probiotics has the stronger overall evidence (9 vs 4/10); they're alternatives for support mood — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Probiotics wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
3 of 3 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
22 of 29 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Agmatine and Probiotics have evidence — compare verdict strength side-by-side.
500-2500mg daily
Empty stomach for mood/nootropic effects, Pre-workout for pumps, Before bed for neuroprotection
Agmatine Sulfate
10-20 billion CFU
With or without food (strain-dependent), Same time daily for consistency
Capsules with multiple strains
2-4 weeks
1-2 weeks
Ongoing
Acute
2-4 weeks
4-8 weeks
4-8 weeks
First 1-2 weeks
Exploring the Cardiovascular Impacts of Agmatine: A Systematic Review
Medical sciences (Basel, Switzerland) (2025) · Systematic review
The effects exerted by AG depend on the dose and route of administration, as well as on the receptors involved and the pathophysiological pathway used.
Role of Inflammatory Mechanisms in Major Depressive Disorder: From Etiology to Potential Pharmacological Targets
Cells (2024) · Review
Together, neuroinflammation and gut dysbiosis induce alterations in tryptophan metabolism, culminating in decreased serotonin synthesis, impairments in neuroplasticity-related mechanisms, and glutamate-mediated excitotoxicity.
Role of agmatine in neurodegenerative diseases and epilepsy
Frontiers in bioscience (Elite edition) (2014) · Review
Agmatine, a cationic polyamine synthesized after decarboxylation of L-arginine by the enzyme arginine decarboxylase, is an endogenous neuromodulator that emerges as a potential agent to manage diverse central nervous system (CNS) disorders.
Preventive Effect of Probiotics on Oral Mucositis Induced by Cancer Treatment: A Systematic Review and Meta-Analysis
International journal of molecular sciences (2022) · Meta analysis · n=708
Three trials using Lactobacilli-based probiotics reported that the incidence of oral mucositis in the probiotic group was significantly low (risk ratio [RR] = 0.84, 95% confidence interval [CI] = 0.77−0.93, p = 0.0004).
Probiotics for treating acute infectious diarrhoea
The Cochrane database of systematic reviews (2020) · Meta analysis · n=12127
Effect size was similar in the sensitivity analysis and marked heterogeneity persisted.
Probiotics for the prevention of Clostridioides difficile-associated diarrhea in adults and children.
The Cochrane database of systematic reviews (2025) · Meta analysis · n=9955
Probiotics may prevent CDAD: NNTB 65 (95% CI 48 to 97)
Based on single pilot study (n=11) showing 46% pain reduction. Very limited evidence with small sample size. GI discomfort may occur at higher doses. Individual variation noted in study.
Based on meta-analyses showing benefits for IBS and digestive symptoms. Effect sizes varied considerably between studies with low to very low certainty of evidence. Initial GI symptoms common when starting but typically resolve within 1-2 weeks.
AI-estimated from published studies. Interpret as directional guidance.
Probiotics has a higher evidence score (9/10 vs 4/10) and wins in 3 of 3 categories.
For support mood, Agmatine has a higher relevance score (65 vs 60).
No known interactions between Agmatine and Probiotics have been documented in our database. However, always consult a healthcare provider before combining supplements.
The honest tier list — proven staples vs situational vs mostly marketing. The hub the other guides feed into.
On Ozempic/Wegovy/Mounjaro? What actually helps — muscle preservation, GI relief, nutrient gaps (no upsell).
Saffron, EPA omega-3, SAMe have real adjunct evidence — but these aren’t a substitute for care, and some interact dangerously.
Probiotics vs prebiotics vs synbiotics, the CFU myth, and what actually helps bloating.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.