Like leucine, isoleucine belongs to the leucines and is an essential amino acid that slows down the breakdown of muscle and skin tissue and is therefore a popular dietary supplement for muscle building.

Isoleucine is used in skin care cosmetics as an anti-aging active ingredient, among other things. The amino acid promotes the skin's natural ability to regenerate, thus strengthening the skin barrier. Isoleucine also stimulates cell renewal in the deeper skin layers and provides more resilience and elasticity.

Isoleucine is contained in our amino acid complex.