Beta-alanine
Also called β-alanine. Nonessential amino acid (carnosine precursor).
Bottom line
Beta-alanine is an amino acid the body uses to make carnosine, an acid buffer in muscle [26][13]. Pooled placebo-controlled trials showed a small overall effect on exercise (effect size 0.18), larger for capacity tests lasting 0.5-10 minutes [1], but no clear gain in repeated-sprint performance or lean mass [7][11]. The main reported side effect is skin tingling (paresthesia) [12].
- In a meta-analysis of 40 placebo-controlled studies with 1,461 participants, beta-alanine had an overall effect size of 0.18 on exercise, larger for capacity tests lasting 0.5-10 minutes [1].
- A 2026 meta-analysis of 17 randomized trials found no improvement in repeated-sprint performance, and a meta-analysis of 20 trials found no clear effect on fat-free mass [7][11].
- Across 101 human studies, tingling of the skin (paresthesia) was the only reported side effect, and dropout rates were similar to placebo [12].
- Health Canada's Workout Supplements monograph lists beta-alanine for adults at up to 6.4 g a day, while the EU refused a claim that it increases short, high-intensity exercise performance [21][24].
Evidence by outcome
| Outcome | Grade | Basis | Modifiers | Rationale |
|---|---|---|---|---|
| Endurance performance | B Moderate | Meta-analyses with a significant pooled effect that is small overall and depends on the test (B); not A because the pooled effect on performance tests was not significant, EFSA found an effect in only 1 of 11 studies, and no supporting meta-analysis is confirmed independent | Why B grade for Endurance performance: explainedApproved of the Endurance performance grade | |
| Strength and power output | C Limited, no effect found | Limited, mixed: meta-analyses in healthy populations are null for repeated-sprint power and non-significant or context-specific for sprint and jump, but maximal strength has no meta-analysis and a 2025 review found inconsistent results with some positive findings, so N would overstate the null for strength (editor ruling 2026-11-11) | Why C grade for Strength and power output: explainedApproved of the Strength and power output grade | |
| Lean mass | N No benefit shown, no effect found | Meta-analysis of 20 RCTs in the relevant population null on fat-free mass | Why N grade for Lean mass: explainedApproved of the Lean mass grade |
Grades describe evidence for each outcome, not a recommendation. Open a grade for its rationale and dated grade history. How we grade
Each section below names the population studied. Our grades are proposals per outcome; the evidence grading method explains what each grade requires, and the evidence matrix compares beta-alanine with other compounds for physical performance.
Does beta-alanine improve high-intensity exercise capacity?
In pooled trials, yes, for capacity tests lasting 0.5-10 minutes, though the overall effect across all tests was small [1]. A 2017 systematic review and meta-analysis (a study that pools results from many trials) included only double-blind, placebo-controlled studies in healthy participants [1]. It combined 40 studies with 65 exercise protocols and 1,461 participants and found a significant overall effect size of 0.18 compared with placebo [1]. An effect size is a standardized measure of the difference between groups, which lets results from different tests be combined. Exercise duration changed the size of the effect [1]. For tests lasting 0.5-10 minutes, the effect was larger for exercise capacity tests, which measure how long someone can keep going at a set intensity (0.4998), than for performance tests, which measure the result on a defined task such as a time trial (0.1078) [1]. The performance estimate was uncertain: its confidence interval crossed zero, so it did not show a statistically clear benefit [1]. Training status and the total amount of beta-alanine taken did not change the result [1].
An earlier 2012 meta-analysis of 15 studies with 360 participants points the same way [2]. Beta-alanine improved exercise capacity compared with placebo, but not exercise performance, and it helped exercise lasting 60-240 seconds and longer than 240 seconds, but not exercise under 60 seconds [2]. The median improvement was 2.85% in an exercise measure, after a median total of 179 g of beta-alanine [2].
Newer pooled analyses in specific groups agree on direction. In 18 double-blind trials in trained men aged 18-40 (331 participants), the overall effect size was 0.39 in favor of beta-alanine [3]. In women, a 2026 meta-analysis of 11 randomized trials (312 women) found a pooled effect on time to exhaustion across 8 of them (standardized mean difference, or SMD, 0.49, an effect size of the same kind), with certainty rated very low because of risk of bias, imprecision and publication bias [4]; its authors declare no commercial or financial conflicts [4]. An individual-participant analysis of cycling to exhaustion found beta-alanine added 7.7 seconds on average compared with placebo, and found no sign that some people respond while others do not [5]. In a 24-week randomized, placebo-controlled trial in 25 active men, cycling capacity improved with beta-alanine (P = 0.05) [16].
Evidence is mixed at the edges, and in the 2017 meta-analysis the length and type of test changed the size of the effect [1]. A 2020 meta-analysis of 19 studies of efforts near the aerobic-anaerobic transition found only small effects [6]. The European Food Safety Authority (EFSA) reviewed the evidence in 2014 for a health claim and found an effect in only one of 11 relevant human intervention studies on short, high-intensity exercise performance [25]. The ISSN position stand reports clearer effects in time trials lasting 1 to 4 minutes [13], but several of its authors disclose funding from or roles with supplement companies, including NAI and Nutrabolt [13]. A review sponsored by the US Department of Defense judged the evidence of benefit limited and did not support beta-alanine use by military personnel [14].
Does beta-alanine increase strength or power?
Not clearly, in pooled trials [7][8]. A 2026 preregistered systematic review and multilevel meta-analysis of 17 randomized controlled trials in healthy people found no significant improvement in mean repeated-sprint performance (SMD -0.018), peak repeated-sprint performance or fatigue across sprints [7]. Dose, duration, type of exercise and training status did not change that null result [7]. The review was funded by public sports and research programs in China, and its authors declare no commercial conflicts [7].
A 2026 network meta-analysis of 52 randomized trials in healthy adult athletes compared creatine, beta-alanine and both together on sprint, jump, agility and muscular endurance [8]. Beta-alanine produced non-significant or context-specific effects, and adding it to creatine gave no extra benefit [8]. This fits the 2012 finding of no benefit for exercise under 60 seconds [2], and the 2026 review in women, which found no clear pooled effect on peak power [4].
A 2025 systematic review of 9 studies with 197 trained people called the strength and power results inconsistent [9]. Positive results were more likely with 4-6.4 g a day split into small servings such as 0.8 g, while trials that used single large servings, sustained-release forms or low-stress training often found nothing [9]; that review did not pool results. In older adults, a review of five trials (163 participants) found that muscle strength and functional performance did not seem to improve [10]. The ISSN position stand also says more research is needed on strength [13].
Does beta-alanine increase lean mass?
Current pooled evidence does not show a clear increase in lean mass [11]. A GRADE-assessed meta-analysis of 20 randomized controlled trials with 492 participants found no significant effect on fat-free mass (0.05 kg; 95% CI -0.71 to 0.82, a range that includes both small losses and small gains) or fat mass compared with placebo [11]. Results were similar whether the trials used resistance, endurance or combined training, lasted under 8 weeks or 8 weeks or more, or used under 6 g or at least 6 g a day, and certainty was rated low to moderate [11]. The authors concluded that beta-alanine is unlikely to improve body composition, whatever the dose and whether or not it is combined with training [11]. One author discloses industry-sponsored nutraceutical research and paid talks on beta-alanine at industry-sponsored conferences [11]. The 2026 meta-analysis in women found no clear effect on body fat percentage [4].
What the evidence does not show
The evidence does not show a benefit for very short efforts. Repeated sprinting, peak power and exercise under 60 seconds did not improve in pooled trials [7][2][4]. It also does not show that a higher total dose gives a bigger effect: the 2017 meta-analysis found no link between the total amount taken and the effect [1].
Combining beta-alanine with other supplements is a separate question. The 2017 meta-analysis found the largest effect, 0.43 compared with placebo, when beta-alanine was taken with sodium bicarbonate [1], while the 2026 network meta-analysis found no added benefit from combining it with creatine [8]. Cognitive outcomes are not graded on this page: a PubMed search on November 11, 2026 returned 7 randomized trial records, mostly small trials in older adults and military personnel, which we have not appraised.
Doses used in studies
Ranges researchers used, not dosing advice. Bars share one scale. Read our disclaimer.
240 mg to 6.4 g a day; at most 3.2 g per single dose
Timing and form
The exercise trials pooled in the 2017 meta-analysis studied repeated supplementation over a period of weeks rather than single doses, and that analysis excluded crossover designs because of the long washout period for muscle carnosine after supplementation [1]. Single-dose (acute) studies also exist, but a 2020 meta-analysis found evidence on acute supplementation scarce, with one study [6]. Repeated-sprint trials ran for 3 to 10 weeks [7]. Two trial reports discussed here followed supplementation for 24 weeks [15][16].
Trials have used both sustained-release and other forms [7]. Nearly half the trials in the 2026 repeated-sprint meta-analysis used a patented sustained-release formulation to reduce tingling [7]. The ISSN position stand reports that tingling was reduced with a sustained-release form or with divided lower doses [13]. The 2025 strength review found that some trials using sustained-release forms or single large servings did not show performance gains [9].
What it is
Beta-alanine (β-alanine) is a nonessential amino acid that is commonly used to improve exercise performance [3]. The body does not build it into proteins [26]; instead it is the rate-limiting building block for carnosine, a compound made of histidine and beta-alanine that sits in skeletal muscle [26]. The liver makes beta-alanine, and small amounts come from meat, poultry and fish [26]. NIH ODS estimates dietary intake at anywhere from none in vegans to about 1 g a day in heavy meat eaters [26].
How it works (mechanism, not effect): carnosine helps buffer the acid (hydrogen ions) that builds up in muscle during hard, high-intensity exercise [2]. The International Society of Sports Nutrition (ISSN) position stand states that four weeks of 4-6 g a day raises muscle carnosine, which acts as a pH buffer inside muscle cells [13]. A 24-week trial in 25 active men found muscle carnosine rose at every check, with variation between people [16]. A pooled analysis found that typical protocols may not come close to saturating muscle carnosine, and that nearly all participants (99.3%) responded with a rise [17]. One author of that analysis previously received a scholarship from Natural Alternatives International (NAI), which also partly supported an earlier study in the authors' laboratory [17].
NAI is named as the source of the CarnoSyn sustained-release product used in a 24-week trial [15], and nearly half of the trials in one 2026 meta-analysis used that patented formulation [7].
Safety and interactions
What sources report. Paresthesia was the only side effect reported across 101 human studies, with an odds ratio of 8.9 compared with placebo [12]. Dropout rates were similar with beta-alanine and placebo [12]. Circulating alanine aminotransferase rose slightly, but mean values stayed well within clinical reference ranges [12]. In a 24-week trial at 6.4 g a day, blood markers of kidney, liver and muscle function did not change [15]. NIH ODS notes there are no safety data on use for more than 1 year [26].
Who sources say should be careful.
- Children and teenagers. Health Canada's monograph covers adults 18 years and older only [21].
- Pregnant or breastfeeding women. Health Canada's monograph tells people to ask a health care practitioner before use if pregnant or breastfeeding [21]. As of November 11, 2026 we found no human studies of beta-alanine in pregnancy or breastfeeding (PubMed search, November 11, 2026).
- People who find the tingling hard to tolerate. Health Canada's label wording advises reducing the dose if tingling or prickling occurs [21], and trials found divided doses or sustained-release forms reduced it [13].
In trials, the only side effect consistently reported is paresthesia [12][13]. A 2019 systematic risk assessment and meta-analysis of 101 human and 50 animal studies found paresthesia was the only reported side effect, with an odds ratio of 8.9 compared with placebo [12]. Dropout rates were similar with beta-alanine and placebo [12]. A US Department of Defense-sponsored review rated the evidence for a causal link between beta-alanine and paresthesia as moderate [14]. NIH ODS describes the sensation as tingling, prickling or burning, usually in the face, neck, back of the hands and upper trunk, typically lasting 60-90 minutes and not painful, serious or harmful [26]. Health Canada's monograph lists the label statement "When using this product reduce the dose if flushing, tingling or prickling sensation of the skin occurs" for beta-alanine products [21]. NIH ODS also reports that some research found itchy skin (pruritus) [26].
Blood tests show small changes only. The 2019 meta-analysis found a small rise in alanine aminotransferase (ALT, a liver enzyme), but mean values stayed well within clinical reference ranges [12]. In a 24-week placebo-controlled trial in 25 healthy men, 16 of whom took 6.4 g a day of a sustained-release product from NAI (CarnoSyn), there was no effect on blood markers of kidney, liver or muscle function, and no self-reported side effects [15]. That trial was funded by grants from the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) [15]. The authors of the 2019 review concluded that beta-alanine at the doses studied does not adversely affect people taking it [12], and the ISSN position stand, several of whose authors disclose supplement-industry funding or roles, says it appears safe in healthy populations at the doses it describes [13].
Long-term evidence is thin. The 2019 review notes only limited understanding of potential adverse effects [12], and the Department of Defense review found most studies were not designed to address safety [14]. NIH ODS notes there are no safety data for use beyond 1 year [26]. As of November 11, 2026, no other regulator source we checked sets an upper intake for beta-alanine; Health Canada's Workout Supplements monograph sets a maximum of 6.4 g a day for products made under it [21].
Interactions sources report
As of November 11, 2026 we found no human drug-interaction studies of beta-alanine (PubMed search, November 11, 2026). The only record on a medicine was an animal study: in rats, beta-alanine and baclofen, a spasmolytic (muscle-relaxing) medicine, competed for the same carrier in the gut, and baclofen absorption slowed as beta-alanine concentration rose [18]. We found no human study of this combination (PubMed search, November 11, 2026). As of November 11, 2026, the sources we checked were PubMed records only; drug-interaction reference databases have not yet been checked.
Researchers have also checked whether beta-alanine lowers taurine, another amino acid in muscle [12]. A meta-analysis of human data found no effect of supplementation on muscle taurine, while mice showed an effect only when drinking water contained 3% or more beta-alanine [12]. The 24-week human trial also found no significant change in muscle taurine [15].
These sources describe what has been reported, not what is right for any individual. If you take any of these medicines, talk to your doctor or pharmacist before combining them with beta-alanine.
Regulatory status
| Market | Status | Notes |
|---|---|---|
| US | No FDA statement specific to beta-alanine found as of November 11, 2026 (FDA GRAS inventory search returned no notice); FDA does not approve dietary supplements before they are marketed. | |
| UK | Beta-alanine health claims, including 'Beta-alanine increases performance during short-duration high intensity exercise', are listed as non-authorised in the GB nutrition and health claims register (spreadsheet of May 19, 2026). | |
| Canada | Medicinal ingredient in Health Canada's Workout Supplements monograph (May 29, 2026) for adults 18 and older: 240 mg to 6.4 g a day, at most 3.2 g in a single dose; a muscle carnosine claim applies at 800 mg or more per single dose and 4.8 g a day. | |
| Australia | Not verified as of November 11, 2026. Beta-alanine is not in the Food Standards Code Schedule 29 tables of amino acids or nutritive substances for formulated supplementary sports food, and we found no entry in the Therapeutic Goods (Permissible Ingredients) Determination (No. 3) 2026. | |
| EU | The claim 'Beta-alanine increases performance during short-duration high intensity exercise' was refused by Commission Regulation (EU) 2016/371 after EFSA's 2014 opinion found a cause and effect relationship not established. |
FAQ
Why does beta-alanine make your skin tingle?
The tingling is called paresthesia, and a meta-analysis put its odds at 8.9 times placebo [12]. NIH ODS describes it as a tingling, prickling or burning feeling, usually in the face, neck, back of the hands and upper trunk, that typically lasts 60-90 minutes and is not harmful [26]. Trials found divided lower doses or a sustained-release form reduced it [13].
How much beta-alanine did studies use?
Repeated-sprint trials used 3.2-6.4 g a day for 3 to 10 weeks [7], and the ISSN position stand describes 4-6 g a day for at least 2 to 4 weeks [13]. Trials in older adults used 2.4-3.2 g a day [10]. These are study doses, not advice.
Does beta-alanine build muscle?
A meta-analysis of 20 randomized trials found no clear effect on fat-free mass or fat mass, whatever the dose, duration or type of training [11]. Certainty of that evidence was rated low to moderate [11].
Is beta-alanine safe to take long term?
In a 24-week placebo-controlled trial in 25 healthy men, 16 of whom took 6.4 g a day, blood markers of kidney, liver and muscle function did not change [15]. NIH ODS notes there are no safety data on use for more than 1 year [26]. Talk to a doctor or pharmacist about long-term use.
References
- Saunders B, Elliott-Sale K, Artioli GG, et al. β-alanine supplementation to improve exercise capacity and performance: a systematic review and meta-analysis. Br J Sports Med. 2017.
- Hobson RM, Saunders B, Ball G, et al. Effects of β-alanine supplementation on exercise performance: a meta-analysis. Amino Acids. 2012.
- Georgiou GD, Antoniou K, Antoniou S, et al. Effect of Beta-Alanine Supplementation on Maximal Intensity Exercise in Trained Young Male Individuals: A Systematic Review and Meta-Analysis. Int J Sport Nutr Exerc Metab. 2024.
- Gu J, Wei Y, Huang J, et al. Effects of beta-alanine supplementation on exercise performance and related physiological outcomes in women: a systematic review and meta-analysis. Front Nutr. 2026.
- Esteves GP, Swinton P, Sale C, et al. Individual Participant Data Meta-Analysis Provides No Evidence of Intervention Response Variation in Individuals Supplementing With Beta-Alanine. Int J Sport Nutr Exerc Metab. 2021.
- Huerta Ojeda Á, Tapia Cerda C, Poblete Salvatierra MF, et al. Effects of Beta-Alanine Supplementation on Physical Performance in Aerobic-Anaerobic Transition Zones: A Systematic Review and Meta-Analysis. Nutrients. 2020.
- Liang W, Kong D, Wang Y, et al. No ergogeniceffect of β-alanine on repeated sprint ability: a systematic review and multilevel meta-analysis of randomized controlled trials. Front Nutr. 2026.
- Bai X, Xu T. Effects of combined versus single supplementation of creatine and beta-alanine on aerobic and anerobic performance: a systematic review and network meta-analysis. J Int Soc Sports Nutr. 2026.
- Ong SW, Chen WL, Chien KY, et al. Dosing strategies for β-alanine supplementation in strength and power performance: a systematic review. J Int Soc Sports Nutr. 2025.
- de Camargo JBB, Brigatto FA. Beta-Alanine for Improving Exercise Capacity, Muscle Strength, and Functional Performance of Older Adults: A Systematic Review. J Aging Phys Act. 2025.
- Ashtary-Larky D, Bagheri R, Ghanavati M, et al. Effects of beta-alanine supplementation on body composition: a GRADE-assessed systematic review and meta-analysis. J Int Soc Sports Nutr. 2022.
- Dolan E, Swinton PA, Painelli VS, et al. A Systematic Risk Assessment and Meta-Analysis on the Use of Oral β-Alanine Supplementation. Adv Nutr. 2019.
- Trexler ET, Smith-Ryan AE, Stout JR, et al. International society of sports nutrition position stand: Beta-Alanine. J Int Soc Sports Nutr. 2015.
- Ko R, Low Dog T, Gorecki DK, et al. Evidence-based evaluation of potential benefits and safety of beta-alanine supplementation for military personnel. Nutr Rev. 2014.
- Saunders B, Franchi M, de Oliveira LF, et al. 24-Week β-alanine ingestion does not affect muscle taurine or clinical blood parameters in healthy males. Eur J Nutr. 2020.
- Saunders B, DE Salles Painelli V, DE Oliveira LF, et al. Twenty-four Weeks of β-Alanine Supplementation on Carnosine Content, Related Genes, and Exercise. Med Sci Sports Exerc. 2017.
- Rezende NS, Swinton P, de Oliveira LF, et al. The Muscle Carnosine Response to Beta-Alanine Supplementation: A Systematic Review With Bayesian Individual and Aggregate Data E-Max Model and Meta-Analysis. Front Physiol. 2020.
- Polache A, Plá-Delfina JM, Merino M. Partially competitive inhibition of intestinal baclofen absorption by beta-alanine, a nonessential dietary aminoacid. Biopharm Drug Dispos. 1991.
- U.S. Food and Drug Administration. Questions and Answers on Dietary Supplements. Updated August 27, 2026.
- Department of Health and Social Care, Food Standards Agency and Food Standards Scotland (GOV.UK). Great Britain nutrition and health claims (NHC) register: health claims spreadsheet (19 May 2026). Updated May 19, 2026.
- Health Canada. Natural Health Products Ingredients Database monograph: Workout Supplements. Updated May 29, 2026.
- Federal Register of Legislation (FSANZ). Australia New Zealand Food Standards Code, Schedule 29: Special purpose foods (compilation F2026C00867). Updated September 1, 2026.
- Australian Government, Department of Health, Disability and Ageing (Federal Register of Legislation). Therapeutic Goods (Permissible Ingredients) Determination (No. 3) 2026 (F2026L01382), volumes 1 and 2. Updated October 13, 2026.
- European Commission (EUR-Lex). Commission Regulation (EU) 2016/371 of 15 March 2016 refusing to authorise certain health claims made on foods. Updated March 15, 2016.
- European Food Safety Authority (EFSA Journal). Scientific Opinion on the substantiation of a health claim related to beta-alanine and increase in physical performance during short-duration, high-intensity exercise (EFSA Journal 2014;12(7):3755, doi:10.2903/j.efsa.2014.3755). Updated July 16, 2014.
- NIH Office of Dietary Supplements. Dietary Supplements for Exercise and Athletic Performance: Fact Sheet for Health Professionals (as archived). Updated April 1, 2024.