Seabuckthorn contains 18 types of amino acids. Amino acids contain nitrogen compounds, therefore making them good rejuvenating material for the body. They not only participate in muscle renewal and growth, but the body uses them to produce enzymes and absorb nutritional ingredients. Amino acids are divided into two groups - essential and non-essential amino acids. The body can synthesize non-essential amino acids itself using other amino acid fragments as a building material, but physically active people demonstrate a higher need for amino acids which places an increased burden on the body. Moreover, essential amino acids cannot be synthesized by the body, therefore they must be a part of regular diet. Due to the diversity of their structures, proteins have many important functions in the body; it is important to intake proteins in regular diet. Non-essential amino acids can be synthesized by the liver through a process known as transanimation while essential amino acids must be obtained through the diet. Both non-essential and essential amino acids are used by the body for the production of proteins that constituent tissues like the skeletal muscle, heart and gastrointestinal tract.