Beta Alanine
Also known as 3-aminopropanoic acid, b-alanine, beta alanine, carnosine precursor
Key takeaways
- Beta-alanine supplementation significantly improves exercise capacity and performance across a large sample of athletes (PMID: 27797728).
- It effectively delays fatigue in trained young males during maximal intensity exercise (PMID: 39032921).
- Supplementation enhances performance specifically in highly-trained judo athletes (PMID: 27601217).
What the research shows
AI-synthesized from 30 peer-reviewed sources · Updated 2025
Beta-alanine is a non-essential amino acid and precursor to carnosine, which acts as a pH buffer in skeletal muscle. Research generally indicates that it can improve exercise capacity and performance, particularly during high-intensity exercise lasting 1-4 minutes, by delaying muscle fatigue.
By condition
High-Intensity Exercise Performance
Strong
Multiple meta-analyses and systematic reviews confirm that beta-alanine improves exercise capacity and performance by increasing muscle carnosine levels to buffer hydrogen ions.
Combat Sports and Judo
Moderate
Evidence suggests improvements in judo-related performance and general combat sports performance due to the nature of high-intensity efforts with short recovery.
Endurance/Long-Distance Running
Weak
Some evidence indicates it may fail to improve performance in longer-duration events, such as 5000m running.
Effective doses
Specific dosing protocols vary, but research includes high-dose loading phases and combined pre-workout doses (e.g., 3.2g beta-alanine combined with other ergogenic aids).
Safety & interactions
Generally well-tolerated; no major contraindications listed in the provided abstracts, though it is often used in combination with other supplements like creatine.
Limitations
There is inconsistency in results across different sports and exercise durations, with less efficacy noted in long-distance endurance events compared to high-intensity bursts.
Top-rated Beta Alanine products
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How it's sold
Data aggregated from 143 product labels
Research evidence
Showing top 10 of 30 sources, sorted by quality
OBJECTIVE: To conduct a systematic review and meta-analysis of the evidence on the effects of β-alanine supplementation on exercise capacity and performance. DESIGN: This study was designed in accordance with PRISMA guidelines. A 3-level mi…
Beta-alanine is a nonessential amino acid that is commonly used to improve exercise performance. It could influence the buffering of hydrogen ions produced during intense exercise and delay fatigue, providing a substrate for increased synth…
**Ashtary-Larky et al., 2025** | Nutrients | Systematic Review Ashtary-Larky Damoon, Candow Darren G, ... Suzuki Katsuhiko. Effects of Creatine and β-Alanine Co-Supplementation on Exercise Performance and Body Composition: A Systematic Revi…
Due to the well-defined role of β-alanine as a substrate of carnosine (a major contributor to H+ buffering during high-intensity exercise), β-alanine is fast becoming a popular ergogenic aid to sports performance. There have been several re…
OBJECTIVES: In official judo competitions, athletes usually engage in 5-7 matches in the same day, performing numerous high-intensity efforts interspersed by short recovery intervals. Thus, glycolytic demand in judo is high and acidosis may…
β-alanine does not have an ergogenic effect by itself, but it does as a precursor for the synthesis of carnosine in human skeletal muscle. β-alanine and carnosine together help improve the muscles' functionality, especially in high-intensit…
**Harlow et al., 2024** | Nutrients | Systematic Review Harlow Jacie, Blodgett Kylie, ... Pojednic Rachele. Dietary Supplementation on Physical Performance and Recovery in Active-Duty Military Personnel: A Systematic Review of Randomized an…
This study investigated the effect of beta-alanine supplementation on short-duration sprints and final 4-km simulated uphill cycling time-trial performance during a comprehensive and novel exercise protocol representative of the demands of …
PURPOSE: This study aimed to describe the kinetics of carnosine washout in human skeletal muscle over 16 wk. METHODS: Carnosine washout kinetics were studied in 15 young, physically active omnivorous men randomly assigned to take 6.4 g·d-1 …
Immune system dysregulation is among the many adverse effects incurred by astronauts during space flights. Omega-3 fatty acids, β-alanine, and carnosine are among the many nutrients that contribute to immune system health. For space flight,…
Frequently asked questions
What is Beta-Alanine and how does it work?
Beta-alanine is a non-essential amino acid that serves as a precursor to carnosine, which acts as a pH buffer in skeletal muscle. Research generally indicates it can improve exercise capacity and performance, particularly during high-intensity exercise lasting 1-4 minutes, by delaying muscle fatigue.
Does Beta-Alanine improve high-intensity exercise performance?
Yes, there is strong evidence that Beta-Alanine improves exercise capacity and performance in high-intensity activities. Multiple meta-analyses confirm it increases muscle carnosine levels to buffer hydrogen ions, effectively delaying fatigue during maximal intensity efforts.
Is Beta-Alanine effective for combat sports like judo?
There is moderate evidence suggesting improvements in judo-related and general combat sports performance. This benefit is attributed to the nature of these sports, which involve high-intensity efforts with short recovery periods where buffering capacity is crucial.
Does Beta-Alanine help with endurance or long-distance running?
Evidence is weak regarding its effectiveness for endurance events. Some studies indicate it may fail to improve performance in longer-duration activities, such as 5000m running or simulated road cycling, suggesting it is less beneficial for sustained aerobic efforts.
What is the effective dose of Beta-Alanine?
Specific dosing protocols vary, but research includes high-dose loading phases and combined pre-workout doses, such as 3.2g of Beta-Alanine combined with other ergogenic aids. Consumers should consult a healthcare provider to determine the appropriate regimen for their needs.
Is Beta-Alanine safe and are there any side effects?
Beta-Alanine is generally well-tolerated with no major contraindications listed in the provided abstracts, though it is often used in combination with other supplements like creatine. Pregnant individuals, those on medications, or people with health conditions should consult a healthcare provider before use.
Does Beta-Alanine have any drug interactions?
No drug interactions have been documented for Beta-Alanine in the provided evidence. However, because it is often combined with other supplements, individuals taking prescription medications should consult a healthcare provider to ensure safety.