L-Tyrosine is the amino acid your body uses to build dopamine and norepinephrine — the two neurotransmitters most associated with drive, motivation and focused attention.

Under demanding conditions, those neurotransmitters get depleted faster than they're replaced. That's the specific situation L-Tyrosine has been studied in.

What it supports

• Mental performance under stress — the research focuses on demanding conditions rather than ordinary rested states
• Supports dopamine and norepinephrine synthesis
• Studied during sleep loss, cold exposure and high cognitive load
• Non-stimulant — it supplies raw material rather than forcing release

How to take it

Usually taken on an empty stomach, 30–60 minutes before a demanding block of work. Most people notice it more on hard days than easy ones, which is consistent with how it's been studied.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Talk to a qualified healthcare professional before starting any new supplement, particularly if you are pregnant, nursing, taking medication or managing a health condition.