Leucine (Isolated BCAA)

What It Is:
A branched-chain amino acid that acts as the key trigger for muscle protein synthesis.

What It’s Used For:

• Muscle growth and repair

• Recovery stimulation post-training

• Works synergistically with EAAs or whey protein

Typical Dose:

• 2–3 g per serving

Side Effects:

• Very safe; occasional digestive discomfort if taken neat

Why It’s Rated 3.5/5:
Scientifically validated muscle-building signal. Works, but needs full protein context to shine.