AICAR vs Orexin-A
Head-to-head comparison of AICAR (5-Aminoimidazole-4-carboxamide Ribonucleotide (Acadesine)) and Orexin-A (Hypocretin-1 (Orexin-A)) — benefits, dosing, side effects, research data, and where to buy.
| Property | AICAR | Orexin-A |
|---|---|---|
| Category | Performance | Cognitive Enhancement |
| Full Name | 5-Aminoimidazole-4-carboxamide Ribonucleotide (Acadesine) | Hypocretin-1 (Orexin-A) |
| Molecular Weight | 338.21 g/mol | 3562 Da |
| Half-Life | ~2-3 hours | Minutes to <1 hour |
| Amino Acids | Nucleoside analog | 33 |
| Typical Dose | — | Research-only; no validated human dose |
| Route | — | Intracerebroventricular/Intranasal |
| Purity | >99% | ≥98% |
| Studies Count | 180 | 42 |
| Research Status | Active Research | Pre-clinical |
AICAR Benefits
- ✓Increases endurance capacity, enhances fatty acid oxidation, promotes mitochondrial biogenesis, improves glucose uptake, cardioprotective effects
Orexin-A Benefits
- ✓wakefulness
- ✓attention
- ✓memory consolidation
- ✓fatigue resistance
AICAR Dosing
Research doses: 50-150 mg subcutaneously. Typically administered 30-60 minutes before physical activity in research settings.
Orexin-A Dosing
Research-only i.c.v. microgram/nanomolar studies|intranasal experimental use|no established human protocol
AICAR Side Effects
- ⚠Potential hypoglycemia, lactic acidosis at high doses, injection site reactions. Banned by WADA as a metabolic modulator.
Orexin-A Side Effects
- ⚠insomnia
- ⚠headache
- ⚠blood pressure changes
Research Overview
AICAR
Salk Institute researchers demonstrated AICAR could increase endurance in sedentary mice by 44% without exercise training. Activates AMPK, triggering PGC-1α expression, mitochondrial biogenesis, and enhanced fatty acid β-oxidation.
Orexin-A
Preclinical studies link orexin signaling to arousal, learning, and memory consolidation, making orexin-A a candidate for cognition-related research. It is not an approved cognitive enhancer and remains an experimental peptide.
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