Beta Alanine-SR

Name: Beta Alanine-SR
Brand: Thorne
SKU: product-0407
Price: 40.00 GBP
Availability: InStock
Rating: 4.9 (46 reviews)

£40.00

Thorne Beta Alanine-SR is a sustained-release beta-alanine supplement designed to support muscular endurance during high-intensity exercise.

Raises muscle carnosine to buffer acid during intense effort
Sustained release reduces the tingling of standard beta-alanine
Suited to interval training, cycling, and high-intensity sport
Supports endurance in repeated bouts of near-maximal effort
Consistent daily use builds carnosine levels over time

4.9 (46 reflections)

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About This Product.

Thorne Beta Alanine-SR is a sustained-release beta-alanine supplement designed to support muscular endurance during high-intensity exercise. Beta-alanine is a non-essential amino acid that raises muscle carnosine levels. Carnosine acts as an intracellular buffer, helping to neutralise the acid build-up that accumulates during intense effort — the mechanism behind that familiar burning sensation that forces you to slow down or stop. Higher carnosine concentrations may allow you to sustain output for longer before fatigue sets in.

This is a supplement suited to athletes in disciplines where repeated bouts of high-intensity effort matter: interval training, cycling, rowing, team sports, and strength training with short rest periods. It is less relevant for purely aerobic, low-intensity work. The sustained-release format addresses a common drawback of standard beta-alanine: paraesthesia, the harmless but sometimes distracting tingling sensation in the skin that occurs when a large dose hits the bloodstream quickly. By spreading absorption over time, the SR tablet reduces that response, which makes consistent daily use more practical.

Thorne is a brand with a long-standing reputation for rigorous manufacturing standards and clean formulations. Their decision to use a sustained-release matrix here reflects a considered approach to tolerability — something our clinicians weigh when recommending a supplement that needs to be taken daily over weeks for carnosine levels to meaningfully rise.

Frequently Asked.

Why does beta-alanine cause a tingling sensation?

The tingling — called paraesthesia — is a benign neurological response to a rapid rise in beta-alanine in the bloodstream. It is harmless, but some people find it distracting enough to stop taking standard beta-alanine supplements. The sustained-release format in this product slows absorption and significantly reduces that effect.

How long before I notice a difference in performance?

Beta-alanine works by gradually raising muscle carnosine concentrations, which takes time. Most research suggests a meaningful increase builds over several weeks of consistent daily intake. It is not an acute, feel-it-today supplement — think of it more like creatine: the benefit comes from sustained loading.

Is this suitable for endurance sports like marathon running?

Beta-alanine is most relevant where the primary limitation is acid accumulation in the muscle — typically efforts lasting roughly one to ten minutes at high intensity. Its benefit in longer, lower-intensity aerobic events is less well supported, so it is a better fit for sports with repeated intense efforts than for steady-state endurance.

Who should avoid beta-alanine or check with a doctor first?

Beta-alanine is generally well tolerated in healthy adults. Those who are pregnant, breastfeeding, or managing a chronic health condition should consult a doctor before starting. If you are taking other pre-workout supplements, check for overlapping beta-alanine content to avoid unintentionally high total doses.

Does it need to be taken on training days only?

No — because the goal is to raise baseline muscle carnosine levels, daily intake on both training and rest days is important. Missing doses on rest days slows progress. Consistency over weeks matters more than timing around any individual session.

Customer Reflections

Overall Sentiment

4.946 reflections

1 – 6 of 46 reflections

Part of my daily stack now

4 months ago

Take two with breakfast, two pre-session. Been doing this for about eight weeks and the difference in my interval sets is noticeable — I can push the last few reps without the wheels coming off as early. No tingle either, which was the whole point of going SR.

First impressions: no tingle, actual results

4 months ago

Was sceptical about switching from a standard beta-alanine powder after years of just tolerating the prickling feeling. First week on these tablets — nothing. No skin flushing, no distraction mid-session. Took a few weeks before I noticed anything meaningful in my interval work on the bike, but by week three I was clearly pushing harder on the later reps. Not a dramatic overnight shift, just a quiet, consistent improvement. Will keep buying.

Consistent and reliable

4 months ago

Swapped from a standard beta-alanine powder that used to give me that itchy face feeling during warm-up. These tablets have none of that. Takes a few weeks to notice anything but once it kicks in it's steady. Happy to reorder.

5 months ago

Does what it says. Took a few weeks but I'm holding pace better on the rowing erg at the end of hard pieces. Will keep using.

Good product, pricey for the tablet count

5 months ago

No complaints about how it works — the tingling I used to get from regular beta-alanine is basically gone with these. My gripe is that the bottle only lasts about three weeks if you're taking the full daily amount. At £37.99 that adds up fast. Results are solid though so I'll keep buying.

Solid from the start

5 months ago

Picked these up before starting a new rowing block. The SR format was the main draw — I'd tried beta-alanine before and the tingling put me off daily use. These are genuinely much easier to take consistently. Early days but I'm already noticing I'm not blowing up quite as hard in the third set of hard intervals.

Beta Alanine-SR

About This Product.

How to Take It

Frequently Asked.

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