There a 3 types of Amino Acids, Conditional Amino Acids, Nonessential Amino Acids and Essential Amino Acids, However all of them are important to us. 'Essential' amino acid just means they cannot be made by the body. Amino acid supplements are especially vital for athletes because they support muscle building, and people over 50 as generally people over 50 lose muscle mass. They form proteins which are the building blocks of health and Amino acid supplements can help ensure you have the amino acids you need for cell growth, tissue repair and body functions. Amino Acids also play a vital role in supporting lung function, balance blood sugar, maintaining a healthy heart and lots more.