nail strength and growth - AMINO ACID 2200 MG COMPLEX - 9 essential amino acids supplements - 3B (450 Tablets) WHAT IS AMINO ACID: Amino acids, often referred to as the building blocks of proteins, are compounds that play many critical roles in your body. Some may also be taken in supplement form for a natural way to boost athletic action or improve mood. THE HEALTH BENEFITS OF LYSINE: Lysine is an essential amino acid that plays an important role in the creation of proteins in the body. The human body is unable to produce lysine itself. Lysine supplements can boost the immune system, as well as aid in muscle repair. ISOLEUCINE BENEFITS: Isoleucine is a branched-chain amino acid (BCAA). There are three branched-chain amino acids in the body, isoleucine, valine, and leucine, and all of them help promote muscle recovery after exercise. Isoleucine is an essential acid, which means that it cannot be manufactured in the body and must be obtained through dietary sources. BENEFITS OF VALINE: Valine is one of three branched-chain amino acids. Valine is best-known for its ability to build strong muscles. It boosts protein production, which is essential for muscle formation.