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L-Tyrosine-S

product on market Tablet or Pill Nutri-West Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · grounded in 1 source · methodology

L-Tyrosine is an amino acid that serves as a precursor to dopamine and norepinephrine, which may support cognitive function during stressful conditions. Research providing evidence for these effects is generally considered limited to moderate. The ingredient profile maintains a high safety rating for typical use.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for L-Tyrosine-S
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
Amino acid/Protein
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

500 mg
Market median: 500.0mg (223 products) 24 studies (A:0, B:1)
Claims

Label Claims — Verification

Unverified All Other
Info

Product Information

Directions for Use

Directions for Use: One tablet daily or as directed.

Warnings & Precautions

TAMPER RESISTANT OUTER SEAL - DO NOT USE IF BROKEN.

KEEP OUT OF REACH OF CHILDREN.

CAUTION: NOT TO BE TAKEN WITH MAO INHIBITORS.

Formulation Notes

Contains no starch, salt, sugar, wheat, corn, yeast, soy, milk, or preservatives.

Additional Information

"When You Want The Best"

Store in cool, dry place.

Product # 1944

FOR DISTRIBUTION BY HEALTH CARE PROFESSIONALS ONLY.

9891 MFG12/2009

Metadata

Product Details

DSLD Entry Date2013-11-25
Product TypeAmino acid/Protein
FormTablet or Pill
BrandNutri-West
DSLD ID28016
Data Updated2026-04-11
Research

Research Evidence

50
Research Sources
47
Avg Quality
28
Rct
13
Clinical Trial
5
Guideline
4
Systematic Review
A Using a Novel Consensus-Based Chemoinformatics Approach to Predict ADMET Properties and Druglikeness of Tyrosine Kinase Inhibitors.
Guideline International journal of molecular sciences 2025 PubMed DOI
B Australia and New Zealand consensus statement on the cardiovascular management of patients with chronic lymphocytic leukaemia treated with Bruton's tyrosine kinase inhibitors.
Guideline Internal medicine journal 2025 PubMed DOI
B Branched-chain amino acid supplementation for improving growth and development in term and preterm neonates
Systematic Review The Cochrane database of systematic reviews 2020 PubMed DOI
B [Clinical practice guideline on anaplastic lymphoma kinase-tyrosine kinase inhibitors for non-small cell lung cancer (2025 edition)].
Guideline Zhonghua zhong liu za zhi [Chinese journal of oncology] 2025 PubMed DOI
B [Chinese expert consensus on epidermal growth factor receptor tyrosine kinase inhibitors for the treatment of non-small cell lung cancer (2025 edition)].
Guideline Zhonghua yi xue za zhi 2025 PubMed DOI
B Consensus Guideline for the Diagnosis and Treatment of Tyrosine Hydroxylase (TH) Deficiency.
Guideline Journal of inherited metabolic disease 2025 PubMed DOI
B Baseline-dependent effect of dopamine's precursor L-tyrosine on working memory gating but not updating
Rct Cognitive, affective & behavioral neuroscience 2020 PubMed DOI
B Effect of Amino Acid Supplementation on Iron Regulation after Endurance Exercise
Rct Nutrients 2023 PubMed DOI
C Attenuating Muscle Damage Biomarkers and Muscle Soreness After an Exercise-Induced Muscle Damage with Branched-Chain Amino Acid (BCAA) Supplementation: A Systematic Review and Meta-analysis with Meta-regression
Systematic Review Sports medicine - open 2024 PubMed DOI
C The Effects of Green Tea Amino Acid L-Theanine Consumption on the Ability to Manage Stress and Anxiety Levels: a Systematic Review
Systematic Review Plant foods for human nutrition (Dordrecht, Netherlands) 2020 PubMed DOI
View all evidence for Tyrosine →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.