Ingredients / Focus & brain

L-tyrosine

Also listed as: N-acetyl-L-tyrosine, acetyl L-tyrosine

What it is

An amino acid your body uses to make brain chemicals such as dopamine and noradrenaline. N-acetyl-tyrosine is a form that dissolves more easily.

Why it is in energy drinks

Marketed for focus and mental performance, especially under stress.

Worth knowing

The research is mostly on stressful situations like sleep loss, not on everyday use.

General information, not medical advice. We read what the label lists and don't test what an ingredient does.