Acetyl L-tyrosine is a more absorbable form of the amino acid L-tyrosine. The body uses it to make neurotransmitters like dopamine and norepinephrine, and the acetyl group helps it cross into the brain more easily.
People take it to stay sharp during stressful situations, long work hours, or bouts of poor sleep. It supports focus and mental stamina when you are worn down or facing a demanding task.
Take it in the morning or early afternoon on an empty stomach with water for best absorption. It has a mildly stimulating effect, so late-day dosing can disrupt sleep. Skip it if you have high blood pressure or hyperthyroidism, and talk to your doctor if you take MAO inhibitors.