Nootropic profile
L-Tyrosine
L-Tyrosine is a non-essential amino acid and the direct precursor to dopamine, norepinephrine, and adrenaline. Most effective at preserving cognitive function under acute stress, sleep deprivation, and demanding conditions where catecholamine stores become depleted.
Educational only: this is not medical advice. Always check with a qualified healthcare professional before starting any supplement.
What is L-Tyrosine?
L-Tyrosine serves as the primary building block for catecholamine neurotransmitters - dopamine, norepinephrine, and adrenaline - which govern attention, motivation, working memory, and the stress response.
What it does for you
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How to take it
- Acute Cognitive Support: 500–2,000 mg taken 30–60 minutes before a stressful situation.
- Research Doses: 100–150 mg/kg body weight (higher than typical supplement protocols).
- Daily Supplementation: 500–1,500 mg per day.
Watch out for
- Common Side Effects: Nausea, headache, heartburn. May trigger migraines in susceptible individuals.
- Thyroid Interactions: May increase thyroid hormone production. Avoid with hyperthyroidism.
- MAOI Interactions: May cause dangerous blood pressure increase with MAOIs. Must be avoided.
- Levodopa: May reduce absorption of levodopa (Parkinson's medication).
The science, if you're curious.
- Hydroxylated by tyrosine hydroxylase to form L-DOPA, then converted to dopamine and norepinephrine.
- Provides additional substrate when catecholamine turnover increases under stress, preserving cognitive performance.
- Enhances dopaminergic activity in the prefrontal cortex and striatum.
- Tyrosine hydroxylase is inhibited by its end products, providing a safety mechanism against excess.
Where to find it
- Meat and Poultry: Beef, chicken, turkey (500–1,000 mg per 85 g serving).
- Dairy and Eggs: Cheese (especially aged varieties), milk, yoghurt.
- Plant Sources: Soy products, sesame seeds, pumpkin seeds, almonds.
- Supplements: Free-form L-Tyrosine (preferred) available as capsules and powder.
The research
Frequently asked
L-Tyrosine is a non-essential amino acid and the direct precursor to dopamine, norepinephrine, and adrenaline. Most effective at preserving cognitive function under acute stress, sleep deprivation, and demanding conditions where catecholamine stores become depleted.
The main benefits people report from L-Tyrosine are: Cognitive Enhancement, Creativity, Energy, Focus, Memory, Mood, Motivation, Stress Relief.
Acute Cognitive Support: 500–2,000 mg taken 30–60 minutes before a stressful situation.Research Doses: 100–150 mg/kg body weight (higher than typical supplement protocols).Daily Supplementation: 500–1,500 mg per day.
Common Side Effects: Nausea, headache, heartburn. May trigger migraines in susceptible individuals.Thyroid Interactions: May increase thyroid hormone production. Avoid with hyperthyroidism.MAOI Interactions: May cause dangerous blood pressure increase with MAOIs. Must be avoided.Levodopa: May reduce...
Hydroxylated by tyrosine hydroxylase to form L-DOPA, then converted to dopamine and norepinephrine.Provides additional substrate when catecholamine turnover increases under stress, preserving cognitive performance.Enhances dopaminergic activity in the prefrontal cortex and striatum.Tyrosine hydroxyl...
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