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Research library/L-Tyrosine
Cognition · Ingredient guide

L-Tyrosine

An amino-acid precursor for catecholamines and thyroid hormones, studied mainly under acute stress.

Compare
Evidence strengthLimited evidence
Based on consistency, quality and relevance of human research—not podcast mentions.
Common research protocol100–150 mg/kg acutely in stress studies
Protocols mapped1 goal-specific protocol
Evidence reviewed throughSeptember 2026
Evidence verdict

Limited evidence for the stated context. It is not an established everyday nootropic and weight-based study doses can be large.

Scientific evidence1 reviewed sourceDetermines the evidence grade
Expert & media context0 reviewed sourcesDoes not change the grade alone
01

What it is & primary uses

An amino-acid precursor for catecholamines and thyroid hormones, studied mainly under acute stress.

Acute stress researchSleep-deprivation researchCold-exposure research
02

Main benefits

  • May preserve selected cognitive tasks during severe acute stress or sleep loss.
  • It is not an established everyday nootropic and weight-based study doses can be large.
03

Studied protocols

Research doses are grouped by outcome. They describe study designs—not a personal prescription.

Acute stress research

100–150 mg/kg acutely in stress studies

Low confidence
Study duration
Commonly 4–12 weeks; protocol and outcome vary
Interpretation
It is not an established everyday nootropic and weight-based study doses can be large.
04Food sources & equivalents
Food sources & equivalents

Can food provide a studied amount?

Approximate only
Comparison target100–150 mg/kg acutely in stress studies

Protein-rich foods such as dairy, meat, fish, eggs and soy can provide related dietary exposure, but food and extract milligrams are not automatically interchangeable.

Protein-rich foods such as dairy, meat, fish, eggs and soyFood amount varies

Dietary exposure; verify composition before comparing with a studied supplement dose

How this was estimated
Dose Radar compares the declared active ingredient with official composition data or the studied standardized extract—not with marketing names.
Important limitation
Natural content, preparation, bioavailability and formulation vary. This comparison does not prove equal physiological effect.

Food equivalents compare ingredient mass using published composition values. They do not prove equal absorption, formulation, physiological effect, safety or personal need.

Source: L-Tyrosine: current human evidence index ↗
05How to take it for absorption & tolerance
Meal relationship

Empty stomach optional

Evidence-informed
Empty stomach optional; formulation and tolerance remain part of the comparison.

Fasting may change absorption or speed of onset, but tolerance and the studied formulation take priority.

Practical approach
30–90 minutes before the acute stressor. Keep the formulation and daily total consistent with the evidence context shown above.
Watch for
MAO inhibitors

Meal guidance reflects human pharmacokinetic, clinical, official-label or evidence-review sources where available. A food pairing can change absorption or tolerability, but does not make a supplement necessary, effective or safe for every person.

Source: L-Tyrosine: current human evidence index ↗
06Supplement interaction check
Library interaction context156 ingredients · 0 mapped signals for this guide

An unlisted pair means no established pair-specific interaction was identified in this review—not proof that every dose, product or person is safe.

No pair-specific signal listedNo established interaction with another Dose Radar ingredient was identified in this review.

This is not proof that every dose, product or user context is safe. Medication and condition checks still apply.

07Research notes
Evidence verdict

Limited evidence for the stated context. It is not an established everyday nootropic and weight-based study doses can be large.

The displayed amount comes from human research or an official evidence summary. It is not a personalized prescription, and formulation can change whether the comparison is valid.

Timing30–90 minutes before the acute stressor
Time to expected effectStudy-specific; commonly several weeks
08Scientific references
Evidence sourceUsed to assess efficacy, protocols and confidence

Peer-reviewed human research and formal evidence reviews. Open each source to inspect the complete paper record.

Scientific evidence2026Current PubMed systematic-review index↗ PubMed

L-Tyrosine: current human evidence index

Dose context: 100–150 mg/kg acutely in stress studies

May preserve selected cognitive tasks during severe acute stress or sleep loss. It is not an established everyday nootropic and weight-based study doses can be large.

09Expert & media references
Context sourceUsed to understand what professionals discuss

Podcast and practitioner statements are clearly separated from research. They may explain practice or emerging ideas, but do not prove efficacy.

0 reviewed context sourcesNo verified expert or media reference mapped yet.

Dose Radar will leave this lane empty rather than invent or infer a professional opinion.