WHAT IS TYROSINE? Tyrosine is an amino acid that is chemically a pre-cursor to adrenaline. Tyrosine plays a role in the production of neurotransmitters (brain messengers) such as Dopamine & Norepinephrine. It is for this reason Tyrosine has gained popularity as a pre-workout ingredient. Tyrosine can be produced in the body from Phenylalanine & can be found in bananas & avocados. However, the quantities consumed in the diet are typically quite low. BULK POWDERS™ Tyrosine