L-Tyrosine
The amino acid that's the raw material for dopamine, norepinephrine, and thyroid hormones — it's a favorite of people looking for mental clarity under stress, especially in cold or cognitively demanding situations.
Benefits
- +Precursor to dopamine and norepinephrine (focus and motivation neurotransmitters)
- +May support mental performance under stress or sleep deprivation
- +Supports thyroid hormone production
- +May help with ADHD symptoms (some preliminary evidence)
- +Supports healthy mood, especially in stressful conditions
Dosage & Cost
The most well-supported use is for cognitive performance in cold or stressful conditions. It works best when you're actually depleted of catecholamines. N-Acetyl Tyrosine (NAT) is sometimes marketed as more bioavailable, but evidence is mixed — plain L-tyrosine is fine.
Side Effects
- !Headache
- !Nausea or stomach upset
- !May affect blood pressure
- !Could worsen anxiety in some people
- !May interact with thyroid medication or MAO inhibitors
Food Sources
- • Almonds and other nuts
- • Avocado
- • Bananas
- • Dairy (milk, cheese)
- • Sesame seeds
- • Eggs
References & Links
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This page is for informational purposes only. The information here has not been evaluated by the Food and Drug Administration (FDA). No supplement discussed on this page is intended to diagnose, treat, cure, or prevent any disease. Please consult your doctor or a qualified healthcare professional before taking any dietary supplement.