Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Beta-Alanine | Sodium Bicarbonate | |
|---|---|---|
| Category | Amino Acids | Training Compounds |
| Standard Dose | 3.2-6.4g daily | — |
| Timing | Timing relative to exercise does NOT matter — beta-alanine works by chronic muscle carnosine loading, not acute effects. Split into 800mg-1600mg doses throughout the day to reduce paresthesia. Sustained-release form allows larger single doses. | — |
| Cycle Duration | ongoing (carnosine washout occurs over 6-15 weeks after cessation) | — |
| Evidence Level | strong_human | Strong |
Beta-alanine is the rate-limiting precursor for carnosine (beta-alanyl-L-histidine) synthesis in skeletal muscle. Carnosine functions as an intracellular pH buffer, neutralizing hydrogen ions (H+) produced during high-intensity exercise, delaying the onset of muscular fatigue from acidosis. Carnosine also acts as an antioxidant (scavenges reactive oxygen and nitrogen species), an anti-glycation agent (prevents AGE formation), and a metal ion chelator. Chronic supplementation increases muscle carnosine content by 40-80%, with greater accumulation in Type II (fast-twitch) muscle fibers.
3.2-6.4g daily
Timing relative to exercise does NOT matter — beta-alanine works by chronic muscle carnosine loading, not acute effects. Split into 800mg-1600mg doses throughout the day to reduce paresthesia. Sustained-release form allows larger single doses.
ongoing (carnosine washout occurs over 6-15 weeks after cessation)
Extracellular buffer that increases bicarbonate availability and can improve repeated high-intensity performance by delaying acidosis.
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