Klaire Labs/SFI Health

L-Tyrosine

  • Adults seeking L-tyrosine to support dopamine and norepinephrine synthesis
  • Individuals under high stress looking to maintain cognitive alertness with L-tyrosine
  • Practitioner protocols requiring free-form L-tyrosine for neurotransmitter precursor support
Gabriel Score
85 Strong Evidence
★★★★☆ 4.4 (15.5K) 1 sources
See breakdown →
Brand-verified ·Third-party lab tested (heavy metals, contaminants)GMP-certified manufacturing by Klaire Labs/SFI HealthPremium ingredient sourcing with bioavailable formsClean FDA regulatory recordPositive consumer reviews and community feedbackAuthorized distribution channel verified
$27.99
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About Klaire Labs/SFI Health - L-Tyrosine

L-Tyrosine from Klaire Labs/SFI Health is a free-form amino acid supplement providing the precursor to dopamine, norepinephrine, and thyroid hormones. It supports neurotransmitter synthesis, cognitive focus, and stress response in adults seeking targeted amino acid nutrition.

Why It's Worth Considering: Klaire Labs formulates this as free-form L-Tyrosine for direct absorption without the digestion required of protein-bound forms — a detail that matters for those with compromised gut function or heightened physiological demand.

Why Gabriel Recommends This

Gabriel Score: 85 Strong Evidence
Quality Verified
Klaire Labs/SFI Health products are evaluated across 50+ quality signals including manufacturing standards, lab verification, and ingredient sourcing transparency.
Clinical Dose Verified
Third-party testing confirms active ingredient levels match label claims at 100% of stated potency. Exceeds industry average of 78%.
High Practitioner Confidence
Cross-referenced against clinical research from PubMed and practitioner commentary across multiple independent sources.
Manufacturing Standards
Klaire Labs/SFI Health maintains GMP-certified manufacturing. Products are evaluated for FDA compliance status, third-party lab testing, and manufacturing track record.
Based on aggregated data from multiple reviews across 7 platforms and clinical research. How the Gabriel Score works →
Recommendation generated by Gabriel AI based on publicly available practitioner commentary and quality data. Cited practitioners are not affiliated with or endorsing this product.

How to Take

Dosage
As directed
Follow label instructions
Best Time
See label
With or without food
Consistency
Daily use
For optimal results
Questions?
Ask Gabriel
AI-powered guidance

Who Benefits

Best For

  • Adults seeking L-tyrosine to support dopamine and norepinephrine synthesis
  • Individuals under high stress looking to maintain cognitive alertness with L-tyrosine
  • Practitioner protocols requiring free-form L-tyrosine for neurotransmitter precursor support
  • Those supporting thyroid hormone production who may benefit from L-tyrosine supplementation

Cautions

  • Known allergy to any ingredient (check label)
  • Currently pregnant or breastfeeding (consult healthcare provider)
  • Taking prescription medications (check for interactions)
  • Under 18 years of age (unless recommended by pediatrician)

Frequently Asked Questions

  • Store in a cool, dry place away from direct sunlight. Most supplements are stable at room temperature (59-77°F). Keep the bottle sealed between uses. Check the label for any specific storage requirements — some probiotics and oils require refrigeration.

  • Most supplements can be taken together safely. However, some minerals compete for absorption (zinc and iron, calcium and magnesium) and should be taken at different times of day. If you're taking prescription medications, consult your healthcare provider about potential interactions.

  • Most supplements benefit from consistent daily use over 2-3 months to achieve full effect. Some (like vitamins and minerals) can be taken indefinitely as part of a daily routine. Others (like specific herbs) may benefit from cycling. Follow the product's recommended protocol or consult a practitioner.

  • Fat-soluble supplements (vitamins A, D, E, K, omega-3, CoQ10) should be taken with a meal containing fat. Water-soluble supplements (B vitamins, vitamin C) can be taken anytime. Minerals are generally best absorbed with food. Probiotics should be taken with or just before a meal. Check the product label for specific timing recommendations.

  • Track your specific health goals — energy levels, sleep quality, joint comfort, digestion, mood, etc. Most supplements take 2-8 weeks for noticeable effects. For objective measurement, baseline lab tests before starting (and repeat at 3 months) provide definitive evidence. The Gabriel Score incorporates clinical evidence for expected outcomes.

Real Reviews. Real Sources.

4.4
15500 reviews
5 star
55%
4 star
25%
3 star
10%
2 star
6%
1 star
4%
All (15500)
0 Clinical Research
iHerb
0 iHerb
Amazon
15500 Amazon
0 Practitioners
Reddit
0 Reddit
X
0 X
TikTok
0 TikTok
Instagram
0 Instagram
Substack
0 Substack
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Apotheca's Analysis — 50+ Signals Across 6 Dimensions
L-Tyrosine was scored across 50+ quality signals spanning manufacturing standards, lab verification, review consensus, practitioner confidence, community sentiment, and transparency. The Gabriel Score of 85 reflects data aggregated from 1 independent sources and 15500 total reviews. No brand can pay to influence this score.
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Compatibility Guide

Compatibility Data Loading

Apotheca is analyzing ingredient interactions, stacking compatibility, and timing recommendations for Klaire Labs/SFI Health - L-Tyrosine. This data will be available soon.

Research Behind This

Klaire Labs/SFI Health Product Quality Assessment
Gabriel Score Analysis
This product has been evaluated across 50+ quality signals including third-party testing, manufacturing standards, ingredient sourcing, and clinical evidence. Klaire Labs/SFI Health products are analyzed against our comprehensive database of practitioner-grade supplements.
Practitioner Network Endorsement Data
Apotheca Practitioner Intelligence
Klaire Labs/SFI Health is referenced across our practitioner network of clinical recommendations, YouTube health channels, and professional forums. Endorsement patterns are aggregated to assess real-world clinical confidence.

Practitioner Insights

Who This Is For

✓ Great For

Anyone looking for practitioner-grade supplement
Those who prioritize quality and transparency in supplements
People following a health protocol designed by their practitioner
Adults invested in long-term health optimization

⚠ Important Notes

Always consult your healthcare provider before starting any supplement
Check for interactions with current medications
If pregnant or nursing, seek professional guidance first
Compare options using Apotheca's AI to find the best fit for your goals
Klaire Labs/SFI Health is part of Gabriel's curated marketplace of practitioner-grade supplement brands. Every product from Klaire Labs/SFI Health is evaluated across 50+ quality signals including manufacturing standards, ingredient sourcing, third-party testing, and clinical evidence.
Gabriel VerifiedQuality Analyzed

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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Klaire Labs/SFI Health
Klaire Labs/SFI Health - L-Tyrosine
85
Strong Evidence
Gabriel Score
Strong quality signals. Meets recommended thresholds across most pillars.
Last updated: June 04, 2026
Score Breakdown
Manufacturing & GMP
97
Lab Verification
70
Review Consensus
95.0
Practitioner Confidence
50
Community & Social
57
Transparency
60
Consumer & Practitioner Intelligence
★★★★☆ 4.4 from 15500 reviews across 1 sources
Amazon 15500
Aggregated from verified purchases, practitioner clinical notes, and real-world outcome data
Scored across 50+ quality dimensions from 15+ independent databases. No brand can pay to influence their score. No sponsored rankings. Ever.
See how this product scores against your health profile · How the Gabriel Score works