Tyrosine is a building block for dopamine and norepinephrine. It helps more when you are already depleted — sleep loss, heat, a long exam — than when you are rested and well fed. It is not a substitute for sleep.
Nootropics
Moderate evidence
L-Tyrosine
Catecholamine precursor for sleep-debt and cold mornings.
How to use
500–2000 mg 30–60 minutes before a demanding, depleted day. Skip late doses.
Details
- Ingredients
- L-Tyrosine
- Benefits
- Working memory under stress, Cold/sleep-loss resilience
- Dosage
- 500–2000 mg
- When to take
- Morning, Empty stomach
- Side effects
- Restlessness, GI upset. Caution with MAOIs and thyroid overactivity.
- Scientific evidence
- Military and sleep-deprivation studies are the cleanest; everyday “motivation” claims are weaker.
- Form
- Capsule
Editorial rating ★ 4.0
Useful under load. Invisible on an easy week, which is how precursors work.
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