Beta-Alanine — Supplements
Rate-limiting precursor to carnosine that buffers intramuscular pH during high-intensity exercise.
Overview
Beta-alanine is a non-proteinogenic amino acid that serves as the rate-limiting precursor to carnosine (beta-alanyl-L-histidine) synthesis in skeletal muscle. Carnosine acts as an intracellular pH buffer, delaying the onset of muscular fatigue during high-intensity exercise. Meta-analyses of >40 studies confirm ergogenic benefits for exercise lasting 1-10 minutes, with a median improvement of 2.85% in exercise capacity. The International Society of Sports Nutrition recognizes beta-alanine as an effective ergogenic aid.
Indications
- High-intensity exercise performance (1-10 min duration)
- Intramuscular pH buffering
- Repeated sprint performance
- Anaerobic exercise capacity
Mechanism of Action
Beta-alanine combines with L-histidine via carnosine synthase to form carnosine in skeletal muscle
Dosing
| Compound | Dose | Frequency | Notes |
|---|---|---|---|
| Beta-Alanine | 3.2 g | Once daily (or split into 2x 1.6 g) | Loading phase: 4-12 weeks to saturate muscle carnosine |
| Beta-Alanine | 1.6 g | Twice daily | Split dosing reduces paresthesia |
Evidence Grade
GRADE C
Safety & Contraindications
- Paresthesia (tingling) is a common, harmless side effect at doses >800 mg
- Sustained-release formulations reduce paresthesia
- No significant adverse effects reported in clinical trials up to 12 weeks
- Long-term safety (>1 year) data is limited