Solgar L-Tyrosine contains Tyrosine, an amino acid which is naturally present as a free amino acid within the blood and nervous system tissues. Amino acids are the building blocks of protein and are needed in several internal functions of the body. They are classified as \"essential\" or \"non-essential\", with essential amino acids meaning they cannot be manufactured by the body and must be supplied in the diet to maintain good all-round health. Amino acids can be further used by the body to create hormones, enzymes, neurotransmitters, antibodies and nutrient carriers. A suboptimal intake of the essential amino acids increases the body\'s need for the non-essential amino acids either through diet or supplementation. Foods that increase amino acid intake are meat, beans, cheese and eggs. Tyrosine is a non-essential amino acid and can be found in dairy products, meats, fish, eggs, nuts, beans, oats and wheat. Tyrosine is the precursor of the stress hormones adrenaline and nor-adrenaline, which are responsible for the body\'s ‘fight or flight\' reaction. Chemical messengers that are involved in brain processes also uses Tyrosine. Solgar L-Tyrosine 500mg Vegetable Capsules come in a 1 capsule a day dose in easy to absorb vegetable form. All Solgar products meet our industry recognized \"Gold Standard\" for excellence. Made using naturally sourced ingredients and innovating since 1947, Solgar is your perfect supplement to good health - 98% of Solgar consumers recommend the brand