L-Tyrosine is an amino acid that is naturally produce in the body from another amino acid called phenylalanine. L-Tyrosine can also be found in certain foods such as meat, fish, eggs, dairy products, beans, nuts, oats and wheat. L-Tyrosine is a critical amino acid due to its involvement in the production and regulation of Dopamine, Adrenaline, Noradrenaline, Melanin and Thyroid hormones. Because of this, L-Tyrosine has been shown to have medicinal benefits with regards to improving mental performance, alertness, memory enhancement and beneficial with regards to stress, depression and attention/focus issues. Metabolic Nutrition provides a purified, all natural, highly concentrated dosage of L-Tyrosine for maximum effectiveness & absorption....specifically developed for individuals who want to maximize their health and wellness.