Beta-alanine for cyclists: does it actually make you faster?

But what if there was a way to find a few more watts hidden in the tank at the end of a long race – just enough to push yourself over the finish line faster than your opponents?

Beta-alanine is a supplement that might do just that. It is one of the few performance supplements explicitly endorsed by the International Olympic Committee (for the record, the other ones are caffeine, creatine, nitrates and sodium bicarbonate). And while it isn't a magic bullet, it does support performance by delaying muscle fatigue during short, high-intensity efforts, like sprints and intervals, leading to more effective training and racing. For time trialists, and anyone training in that notorious 'red zone', beta-alanine offers low-risk performance gains.

What is beta-alanine and how does it work?

Beta-alanine is a non-essential amino acid that supports performance, although it doesn't build muscles directly. It helps your body make more carnosine. When you pedal deep into the red zone during a hard effort, hydrogen ions accumulate in your muscles. They make your muscles more acidic, which creates that agonizing burning feeling that causes you to back off your effort. Carnosine is like a sponge, soaking up those ions, reducing the burn, so you can sustain those tough efforts for longer. The more carnosine you have, the more ions are absorbed.

A common misconception worth clearing up: For years, cyclists thought that lactic acid is what causes the burn. But actually lactate is created when your body breaks down carbs for rapid energy without using oxygen – for example, when you are riding over your aerobic threshold like my friends and I did in our team sprint. Lactate isn't the bad guy, your body actually recycles it and uses it as an efficient fuel source (the lactate shuttle). The real culprit of the burning sensation is pesky hydrogen ions that drop the pH of your muscles.

What the research actually shows for cyclists

A landmark study by Hill et al. (2007) took a look at recreationally trained cyclists doing a Time to Exhaustion test at 110% of their maximum power output.

This isn't a direct correlation with an increase in watts, but rather, the ability to hold those high-end watts for longer. Elite World Tour cyclists see less gains because they've already developed their natural muscle buffering systems, but in a criterium or close indoor ROUVY race, even a 1% or 2% improvement can mean the difference between winning or losing that final sprint.

Who benefits most from beta-alanine?

Research shows that its buffering effect works best for efforts lasting from 60 seconds to 4 minutes. For crit racers and sprinters, a regimen of beta-alanine may give you that extra boost you need to cover aggressive attacks and launch those final kicks to the end. Time-trialists will see benefit for maintaining a high threshold pace on punchy, rolling courses.

Does beta-alanine help endurance cyclists?

The studies show it doesn't do much for long days in the saddle like it does for sprints. If your cycling routine consists entirely of steady-state, low-intensity Zone 2 endurance miles, beta-alanine is probably a supplement you can skip. Because carnosine operates primarily to buffer rapid acid buildup during anaerobic, eye-watering efforts, pure long-distance riders who rarely cross their functional threshold power (FTP) will see little to no benefits.

However, if your long rides still include punchy climbs, repeated surges, attacks or sprint finishes, beta-alanine may still offer some gains.

➡️ TIP: If you're comparing beta-alanine with other options, our guide to the best supplements for cyclists and triathletes gives a broader overview of what is worth considering.

Is beta-alanine effective for indoor training?

Beta-alanine makes the most sense for cyclists who train indoors with hard, repeated efforts. On ROUVY, that means short VO2max workouts, sprint sessions (e.g. a 30/30 workout) or punchy climbs, where the burn in your legs really adds up, so a beta-alanine supplement can help you keep working through those repeated hard intervals. It is also a strong fit for the unforgiving, high-wattage starts and attacks of virtual racing.

How to dose beta-alanine

You often see beta-alanine included in pre-workout drinks, but this isn't the best use for the supplement. Pre-workout drinks are taken shortly before exercise to give you an instant boost, but beta-alanine works via accumulation, not timing. So it doesn't matter what time of day you take it, as long as you take it consistently.

The usual protocol is 3.2 to 6.4 grams per day, taken consistently every day. Sustained-release formulas can deliver results with less side effects than the standard powders do.

And how long until it works?

However, some riders may notice some benefits after a couple of weeks of consistent daily use.

Side effects: paresthesia (the tingles) and how to minimise them

Beta-alanine is a well-researched supplement with no known serious side effects for most healthy adults. However, there is one rather awkward side-effect that you need to be aware of: paresthesia.

Paresthesia is a harmless tingling or prickly sensation on the skin, which is usually felt in the face, neck, and hands. The higher the dose, the more intensely you will feel it. The tingling sensation generally begins within 30 to 50 minutes after you take the supplement and wears off within 60 to 90 minutes.

Standard beta-alanine floods your bloodstream quickly, which causes the amino acid to bind to specific sensory neurons just beneath your skin. These neurons send a flurry of signals to your brain that feel like tingling, itching, or pins-and-needles.

As your muscles and liver clear the beta-alanine from your blood plasma, the receptors stop firing, and the sensation fades completely. Although it feels somewhat strange, it isn't harmful.

You can reduce the effects by splitting your daily dose into smaller doses of 1.6 grams throughout the day or by taking an extended release tablet. Taking your dose with carbs or a meal will also reduce the symptoms. Food slows down the absorption rate, which flattens the plasma spike so the receptors don't get so overwhelmed.

Beta-alanine vs creatine vs caffeine: which to choose and can you stack them

My friends know that when I show up for a hard ride, I'll already have a coffee in hand. Caffeine, creatine, and beta-alanine are three of the most scientifically backed performance supplements that exist. They all target entirely different energy pathways in your body, so you don't actually have to choose between them. Used together, they can support different parts of high-intensity cycling performance.

Once you've decided beta-alanine is worth trying, product quality matters.

How to choose a beta-alanine supplement

Sports supplements are loosely regulated, so you'll want to choose yours carefully to avoid uneven doses or powders that are made in factories where they could be cross-contaminated with banned substances. Look for:

1. Third-Party Testing

Look for products that explicitly feature one of these two stamps on the label:

• Informed Sport / Informed Choice: This organization tests every single batch of a product before it goes to market to ensure it is free from over 250 substances banned by the World Anti-Doping Agency (WADA).

• NSF Certified for Sport: Similar to Informed Sport, NSF tests every batch to verify that the supplement contains exactly what it claims on the label and contains no harmful levels of contaminants or banned masking agents.

2. Check the Form: Look for Patented CarnoSyn®

When looking at the ingredient list, search for the CarnoSyn® trademark logo. CarnoSyn® is the globally patented, high-purity form of beta-alanine used in almost all the peer-reviewed clinical trials. If a brand uses generic, unbranded beta-alanine, it is much harder to guarantee its consistency and chemical purity.

Beta-alanine brands worth considering

For clean, highly reputable beta-alanine options that cater directly to endurance and high-intensity athletes, consider these top choices:

• Thorne Beta Alanine-SR (Top Pick for Avoiding Tingles): Thorne is highly regarded in elite endurance sports and is a trusted supplement partner for professional cycling teams. Its patented sustained-release technology reduces side effects and improves absorption. It is fully NSF Certified for Sport.

• Klean Athlete Beta-Alanine: Their beta-alanine is a clean, no-nonsense powder utilizing pure CarnoSyn®. It is heavily vetted via NSF Certified for Sport testing to ensure it contains no fillers or hidden stimulants.

Make beta-alanine work for you

Beta-alanine works best as a targeted tool, not as a shortcut. It will not replace consistent training, smart pacing or proper cycling nutrition, but it can add value when the rest of your routine is already solid.

Choose a tested product, take it consistently and give it enough time to build up before judging whether it works for you.