Beta-Alanine
Also known as: β-Alanine, 3-Aminopropanoic acid
A rate-limiting precursor to carnosine (β-alanyl-L-histidine) synthesis, enhancing intramuscular pH buffering capacity during high-intensity anaerobic exercise.
Last reviewed: 2024-02-01 · 3 indexed studies
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Overview
Beta-alanine is a non-essential amino acid that increases intramuscular carnosine concentrations. It is most effective for exercise lasting 1–10 minutes.
Mechanism & Function
β-Alanine · C₃H₇NO₂ — source: PubChem CID 239
β-Alanine combines with L-histidine via carnosine synthase to form carnosine, which buffers H+ ions in muscle and delays fatigue.
White crystalline amino acid powder. Highly water-soluble.
- Powder
- Capsule
- Tablet
- RTD
Powder is generally preferred for bioavailability or efficacy.
Mechanism of Action
Rate-limiting precursor to carnosine synthesis in skeletal muscle. Elevated carnosine buffers hydrogen ions during high-intensity exercise, delaying fatigue.
Physiological Role
Carnosine acts as an intracellular pH buffer, antioxidant, and anti-glycation agent in type II (fast-twitch) muscle fibers.
Primary Pathways
Performance / Health Relevance
Most beneficial for repeated bouts of high-intensity exercise lasting 60 seconds to 10 minutes. Less relevant for pure strength or ultra-endurance.
Evidence Review
Practical Use & Dosage
- Minimum Effective Dose
- 2g/day
- Optimal Range
- 3.2–6.4g/day split into multiple doses
- Upper / Caution Level
- 6.4g/day
- Timing
- Split into 2–4 doses throughout the day. Timing relative to exercise is irrelevant (chronic loading).
- Best Format
- Sustained-release tablets or powder (split doses)
- Bioavailability
- Rapidly absorbed. Sustained-release formulations reduce paresthesia without compromising carnosine loading.
- Absorption Considerations
- Co-ingestion with meals slows absorption and reduces paresthesia.
Safety & Interactions
Side Effects
- •Paresthesia (harmless tingling, dose-dependent)
Contraindications
- Paresthesia-sensitive individuals at single doses >800 mg (use sustained-release)
- Children under 18 (limited safety data)
Drug Interactions
- •Taurine (competes for same transporter, separate timing)
Who Should Avoid
- •Pregnant or breastfeeding women (limited data)
- •Children under 18 (insufficient safety evidence)
Monitoring
No monitoring needed. Paresthesia is benign and reduces with sustained-release formulations.
Frequently Asked Questions
Auto-generated from indexed evidence — dosage, safety, interactions, and more.
When is Beta-Alanine typically used or indicated?
Beta-Alanine is most commonly used for: High-intensity exercise, Endurance sports, CrossFit, Combat sports. Carnosine acts as an intracellular pH buffer, antioxidant, and anti-glycation agent in type II (fast-twitch) muscle fibers.
How does Beta-Alanine work?
Rate-limiting precursor to carnosine synthesis in skeletal muscle. Elevated carnosine buffers hydrogen ions during high-intensity exercise, delaying fatigue.
What is the recommended dose of Beta-Alanine?
The optimal range is 3.2–6.4g/day split into multiple doses. with a minimum effective dose of 2g/day. Best taken: Split into 2–4 doses throughout the day. Timing relative to exercise is irrelevant (chronic loading).. Upper / caution level: 6.4g/day.
What are the side effects of Beta-Alanine?
Reported side effects include: Paresthesia (harmless tingling, dose-dependent). Monitoring: No monitoring needed. Paresthesia is benign and reduces with sustained-release formulations.
Does Beta-Alanine interact with medications?
Known or theoretical interactions: Taurine (competes for same transporter, separate timing). Always check with a clinician before combining with prescription medication.
Who should avoid Beta-Alanine?
Beta-Alanine is generally not recommended for: Pregnant or breastfeeding women (limited data); Children under 18 (insufficient safety evidence); Paresthesia-sensitive individuals at single doses >800 mg (use sustained-release); and Children under 18 (limited safety data).
How strong is the evidence for Beta-Alanine?
Evidence level: Strong (overall score 78/100), based on 3 indexed studies on SuppIndex.
Research & References (3)
Beta-alanine supplementation to improve exercise capacity and performance
Meta-analysis of 40 studies confirming beta-alanine improves exercise capacity, particularly in activities lasting 0.5–10 minutes.
International Society of Sports Nutrition position stand: Beta-Alanine
ISSN consensus statement on beta-alanine efficacy, dosing, safety and mechanisms.
Effect of beta-alanine supplementation on high-intensity exercise performance
Updated meta-analysis quantifying beta-alanine effect on high-intensity exercise across 40+ trials.
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Research Overview
Strong EvidenceCite this ingredient
One-click citation export in APA, MLA, Chicago, BibTeX, or HTML. The URL below is stable and safe to link.
Stable URL
https://thesuppindex.com/ingredients/beta-alanine
SuppIndex. (2026). Beta-Alanine: Evidence summary, dosage and clinical studies. Retrieved October 23, 2026, from https://thesuppindex.com/ingredients/beta-alanine
Based on 3 indexed studies · Evidence level: Strong.
Goal Ratings
Stack Compatibility
Synergistic with creatine and sodium bicarbonate for buffering capacity.
Related evidence
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Last reviewed Feb 2024