Comparison
Creatine vs Agmatine Sulfate
Creatine
The most-studied performance supplement in history, now well-evidenced as a cognitive enhancer in its own right. The brain consumes about 20% of resting metabolic rate, and creatine buffers ATP at the use site for fast regeneration — especially valuable under mental fatigue and sleep deprivation. Vegetarians benefit most because dietary creatine comes from animal flesh.
Agmatine Sulfate
Decarboxylation product of L-arginine. Modulates NMDA, α2-adrenergic, and imidazoline receptors.
| Field | Creatine | Agmatine Sulfate |
|---|---|---|
| Category | amino-acid | amino-acid |
| Dose range | 3000–5000mg | 500–2500mg |
| Half-life | 3h | 2h |
| Onset | — | — |
| Evidence | EVIDENCEA | EVIDENCEB |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 1800 | 600 |
The comparison in plain English
Auto-generated from dataCreatine and Agmatine Sulfate are both in the amino-acid category respectively. Creatine The most-studied performance supplement in history, now well-evidenced as a cognitive enhancer in its own right. Agmatine Sulfate Decarboxylation product of L-arginine.
Bottom line
Creatine (evidence A, safety 5/5) has a weaker evidence base than Agmatine Sulfate (evidence B, safety 4/5). Creatine has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
Choose Creatine if
Creatine is the better fit when your goal aligns with its mechanism (Phosphorylated by creatine kinase to phosphocreatine, the fastest available ATP buffer in the cell (millisecond timescale)) and the dose range (3000–5000mg) suits your protocol. Half-life is 3h.
Choose Agmatine Sulfate if
Agmatine Sulfate is the better fit when your goal aligns with its mechanism (Low-affinity NMDA receptor antagonist (similar mechanism to memantine), modulates nitric oxide synthase, and binds imidazoline receptors) and the dose range (500–2500mg) suits your protocol. Half-life is 2h.