Amino Acids, BCAAs & EAAs UK

Amino acids are the building blocks of muscle — and getting enough of the right ones is essential for muscle growth, recovery, and overall performance. Whether you're looking for BCAAs to fuel your workout, EAAs for complete muscle protein synthesis, or L-Glutamine to support recovery and gut health, our range of 81+ amino acid supplements has you covered.

Types of Amino Acid Supplements

• BCAAs (Branched Chain Amino Acids) – Leucine, isoleucine, and valine — the three amino acids most directly involved in muscle protein synthesis and reducing muscle breakdown during training. Ideal for intra-workout use to reduce fatigue and preserve muscle.
• EAAs (Essential Amino Acids) – All 9 essential amino acids your body cannot produce itself, including the 3 BCAAs. EAAs provide a more complete amino acid profile than BCAAs alone, making them superior for muscle building and recovery.
• L-Glutamine – The most abundant amino acid in muscle tissue. Supports muscle recovery, reduces soreness, and plays a key role in gut health and immune function.
• L-Citrulline & L-Arginine – Amino acids that support nitric oxide production, improving blood flow, pumps, and endurance during training.
• L-Carnitine – Supports fat metabolism by transporting fatty acids into the mitochondria to be used as energy.
• Amino Acid Blends – Multi-amino formulas combining EAAs, BCAAs, and performance amino acids for comprehensive support.

BCAAs vs EAAs — Which Should You Choose?

• Choose BCAAs if you already consume adequate protein and want targeted intra-workout muscle preservation and reduced fatigue
• Choose EAAs if you want a more complete amino acid supplement that supports full muscle protein synthesis — particularly useful if training fasted or on a lower protein diet

When to Take Amino Acids

• Pre-workout – Prime muscle protein synthesis and reduce muscle breakdown before training
• Intra-workout – Sustain energy, reduce fatigue, and protect muscle during intense sessions
• Post-workout – Accelerate recovery and support muscle repair after training
• Fasted training – EAAs are particularly valuable when training without prior food intake

Shop our full range of 81+ amino acid supplements including BCAAs, EAAs, L-Glutamine and more at Ultimate Fitness 4u with fast UK delivery.

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