Herb Profile
L Tyrosine
Botanical profile with evidence, safety, and practical fit.
Last reviewed: •4 human studies cited
A StrongUse extra caution — Headache, nausea Details
- Evidence
- Strong Human Evidence
- Typical onset
- Varies by prep
- Safety rating
- Moderate caution
- Best for
- Cognitive Support, Dopamine Precursor, Stress Resilience
- Avoid / review if
- MAO Inhibitors, Thyroid Meds
Monograph visual
L Tyrosine
The Hippie Scientist
Where to go next — guides & comparisons
Continue reading
- If you want help with anxiety or stress → Anxiety & stress guides
- If you want sharper focus → Focus guides
- If you want to browse more herbs → All herbs
Safety & Cautions
Headache, nausea
60%
Moderate caution — review before use
Detailed safety fields
Pregnancy, breastfeeding, and contraindications
- - MAO Inhibitors
- - Thyroid Meds
Safety classifications
- - Hormonal Activity Context: Hormone-adjacent wording is present and should be interpreted carefully.
Full safety note
- - Headache, nausea
Safety labels
- - Hormonal Activity Context
Evidence Summary
Evidence lens
Most useful for practical interpretation when safety context also fits.
StrongStrong Human Evidence
Human clinical evidence: Present in source signals
Mechanistic / preclinical: Mechanism mapped — Neurotransmitter Modulation · Stress Response Modulation · Neuroprotective Activity
Research maturity: More interpretable — Long Term Human Evidence May Be Limited.
Safety boundary: Safety note available — Headache, nausea
This profile cites 4 human studies.
How evidence grades work
Each grade reflects the strength and consistency of published human evidence — not marketing claims. Grades are based on study count, design quality, effect size, consistency, and recency.
A
Strong
Multiple RCTs, consistent direction, adequate effect size
B
Moderate
Some RCTs or consistent observational data in humans
C
Preliminary / Mixed
Animal or in-vitro only, or conflicting human data
D
Traditional / Theoretical
Traditional use only; no controlled human trials
Clinical Study Summaries (4)Cited studies informing this profile. RCTs and reviews shown first.
| Study | Type | Sample | Source |
|---|---|---|---|
The shikimate pathway and aromatic amino Acid biosynthesis in plants Maeda H et al. (2012) | — | — | PubMed → |
PubMed indexed authors (2006) | — | — | PubMed → |
Petersen M et al. (2003) | — | — | PubMed → |
PubMed | — | — | PubMed → |
Dosing & Timing
Dose guidance
500 2000 mg acute dosing
How L Tyrosine Works
Simplified mechanism pathway based on preclinical and pharmacological evidence. Does not confirm clinical efficacy.
Mechanism Pathway — How L Tyrosine Works
CompoundTarget / ReceptorMechanismEffect / Outcome
Mechanisms & Biological Pathways
Preclinical pathways
Proposed mechanisms from in vitro and animal research; these do not confirm clinical outcomes in humans.
Neurotransmitter ModulationStress Response ModulationNeuroprotective Activity
Condition guides
Compare & Sourcing
Compare side-by-side tradeoffs or verify active marker guidelines.
Review available sources for L Tyrosine
Independent database mapping — evaluated separately from safety and efficacy scores.
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Safety first · Harm reduction
This information is educational and not medical advice. Start low, avoid risky combinations, and consult a licensed clinician before making health decisions—especially if you use medications, have diagnosed conditions, or are pregnant/breastfeeding.
Learn how we evaluate confidence, safety, and intensity on the methodology page.
Editorial Review
Checked against primary sources, cited evidence, and contraindication language before publication. Evidence claims, safety language, and affiliate modules are reviewed independently. Not personal medical advice.
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Botanical profile context
How to interpret L Tyrosine
L Tyrosine dosage ranges, effects, drug interactions, and harm-reduction safety guide for cognitive support. Strong Human Evidence research evidence. Use this herb profile as a starting point for evidence review, not as a recommendation to start a new supplement. Botanical products can vary by plant part, extract ratio, standardization, dose, and contaminant testing, so two labels with the same common name may not behave the same way.
When reviewing L Tyrosine, compare the traditional-use context against the human evidence, mechanism notes, and safety cautions. Pay special attention to pregnancy, breastfeeding, liver or kidney disease, blood-pressure effects, sedation, stimulation, anticoagulant use, antidepressants, and any prescription medication overlap.
For product decisions, prefer transparent labels, named extracts, clear serving sizes, and third-party quality testing. Avoid treating a long list of possible mechanisms as proof that an herb will solve a specific condition.