You will find beta-alanine in just about every commercial “pre-workout". Many athletes have taken a liking to it because of a specific sensation – shortly after drinking it they start to feel itching or tingling all over the body. They automatically associate this feeling with the supplement having started to work immediately. From the point of view of sports science and physiology, however, this is a mistake. So how should beta-alanine be used to get the most out of it?
What actually is beta-alanine?
Beta-alanine is an amino acid which our body can produce naturally (it is synthesised primarily in the liver) and which we also normally take in from animal foods. Unlike most other amino acids, however, it does not serve as a building block for the growth of muscle protein. Instead, inside the muscles it combines with another amino acid (L-histidine) and together they create a substance called carnosine.
Carnosine then works as an intracellular buffer that protects the muscles from acidification. So why do athletes not simply take carnosine directly? If you simply swallowed it, it would be broken down in the digestive tract and would not effectively reach the muscles. Beta-alanine is therefore the so-called limiting factor for its production – in plain terms, your body can produce exactly as much muscle carnosine as it has beta-alanine available.
Why is a normal diet not enough to saturate the muscles?
Getting an ergogenic (performance-enhancing) dose of beta-alanine exclusively from natural food is physiologically very complicated:
The tingling sensation does not mean immediate performance
That familiar tingling and prickling of the skin, technically called paraesthesia, is in fact only a harmless side effect. It arises as a result of a rapid increase in the level of beta-alanine in the blood and passes on its own after roughly 60 to 90 minutes (Dolan et al., 2019).
How beta-alanine really works: the principle of long-term saturation
In itself, beta-alanine does not delay muscle fatigue. Its only role is to serve as a building block (limiting factor) for the production of carnosine. Carnosine is a dipeptide which builds up inside the muscles and works as an intracellular buffer. During very intense exercise it absorbs hydrogen ions, which prevents acidification of the muscles and delays their failure through fatigue.
The key problem is that the level of carnosine in the muscles cannot be raised in one go. The production of carnosine is a very slow process. Regular supplementation, however, leads to an increase in the stores of carnosine in skeletal muscle of up to 80 % (Harris et al., 2006; Hill et al., 2007). An improvement in the capacity for physical exercise nevertheless only appears after weeks of regular, daily use, not minutes after drinking a drink.
Rules for really effective dosing
If you want to benefit from beta-alanine, you have to approach it in exactly the same way as creatine – it requires chronic, long-term dosing, including on days when you are not training.
Who does this supplementation make sense for?
Once you have saturated your muscles with carnosine after several weeks, beta-alanine really will help you – but only with specific types of exercise. Science shows the greatest benefits in repeated sprints or in maximal efforts lasting roughly 30 seconds to 10 minutes (Saunders et al., 2017).
If your sport is shorter (e.g. a single short weightlifting attempt) or, on the contrary, you run at a steady endurance pace, the benefit of beta-alanine for performance will be minimal. It does have its uses, though, for example in endurance athletes at the moment when they need to speed up into a final sprint to the finish after a long race, or to maximise the work done during interval training.
Conclusion for athletes
Beta-alanine is an excellent supplement that works, if you use it with understanding. Taking it occasionally in one-off pre-workout drinks has only a psychological (placebo) effect caused by the tingling of the skin. If you want to make use of its true physiological potential, invest in pure beta-alanine and take it in smaller doses systematically every day for several weeks.
- Rezende NS, Bestetti GC, Farias de Oliveira L, et al. (2023). Dietary β-Alanine Intake Assessed by Food Records Does Not Associate With Muscle Carnosine Content in Healthy, Active, Omnivorous Men and Women. Int J Sport Nutr Exerc Metab, 33(3):133–140.
- Harris RC, Tallon MJ, Dunnett M, et al. (2006). The absorption of orally supplied beta-alanine and its effect on muscle carnosine synthesis in human vastus lateralis. Amino Acids, 30(3):279–289.
- Hill CA, Harris RC, Kim HJ, et al. (2007). Influence of beta-alanine supplementation on skeletal muscle carnosine concentrations and high intensity cycling capacity. Amino Acids, 32(2):225–233.
- Dolan E, Swinton PA, Painelli VS, et al. (2019). A Systematic Risk Assessment and Meta-Analysis on the Use of Oral beta-Alanine Supplementation. Adv Nutr.
- Saunders B, Elliott-Sale K, Artioli GG, et al. (2017). β-alanine supplementation to improve exercise capacity and performance: A systematic review and meta-analysis. Br J Sports Med, 51(8):658–669.
- Jeukendrup A, Gleeson M. (2025). Sport nutrition (4th ed.). Human Kinetics.
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