Beta-Alanine

What Is Beta-Alanine?

Beta-alanine is a non-essential amino acid that your body uses to produce carnosine, a compound stored in your muscles. Carnosine acts as a buffer against the acid build-up that causes that burning sensation during high-intensity exercise. Supplementing with beta-alanine increases muscle carnosine levels, letting you push harder for longer.

How It Works

During intense exercise, hydrogen ions accumulate in your muscles, lowering pH and contributing to fatigue — that familiar burn during a hard set of 15 reps or a 400m sprint. Carnosine buffers these hydrogen ions, delaying the onset of fatigue. Since beta-alanine is the rate-limiting factor in carnosine production, supplementing with it raises carnosine stores by 40-80% over several weeks.

What the Research Says

Beta-alanine is one of the most well-researched performance supplements. A comprehensive meta-analysis by the International Society of Sports Nutrition concluded that it significantly improves exercise capacity, particularly for efforts lasting 1-4 minutes. Think high-rep sets, CrossFit WODs, rowing intervals, and middle-distance running. For pure strength (low reps, long rest), the benefits are minimal.

The key point: beta-alanine works through daily accumulation, not acute dosing. Taking it once before a workout does nothing meaningful. You need 2-4 weeks of consistent daily intake to saturate muscle carnosine stores.

The Tingling Sensation

The tingling or prickling feeling (paraesthesia) you get from beta-alanine is completely harmless. It is caused by beta-alanine activating sensory neurons in the skin. If you find it uncomfortable, split your daily dose into smaller amounts (e.g., 1.6g twice daily) to reduce the effect.

Who Should Take It

Anyone doing high-rep resistance training, CrossFit, circuit training, rowing, cycling, or any activity involving sustained high-intensity efforts lasting 1-4 minutes. If your training mainly involves heavy singles, doubles, and triples with long rest periods, the benefit is marginal.

Who Should Skip It

If your training is purely low-rep strength work, the money is better spent elsewhere. It is also not particularly useful for pure endurance (long, steady-state cardio) where acid buffering is not the limiting factor.

Vegan?

Beta-alanine is vegan-friendly. It is produced synthetically and does not contain any animal-derived ingredients.

Where to Buy

• Myprotein Beta-Alanine Powder — from £8.99
• Bulk Beta-Alanine — from £7.99
• Amazon — NOW Sports Beta-Alanine — from £11.99

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