<br><span style='color: rgb(0, 0, 0);' data-mce-style='color: #000000;'>HealthWise? L-Tyrosine is a 100% pure pharmaceutical grade amino acid. Tyrosine is found in many high protein foods and is synthesized in the body from the amino acid phenylalanine.</span><br><span style='color: rgb(0, 0, 0);' data-mce-style='color: #000000;'>L-Tyrosine plays a role as a precursor to various neurotransmitters and hormones found in the human brain.</span><br><span style='color: rgb(0, 0, 0);' data-mce-style='color: #000000;'></span><br><span style='color: rgb(0, 0, 0);' data-mce-style='color: #000000;'>Did you know?</span><br><span style='color: rgb(0, 0, 0);' data-mce-style='color: #000000;'>The word 'tyrosine' is from the greek tyros, meaning cheese, as it was first discovered in 1846 by German chemist Justus von Liebig in the protein casein from cheese.<br></span>