Source Naturals

L-Theanine 200mg 30 capsules

Capsules

  • Focus · 92% of verified reviews
  • Calm · 88% of verified reviews
  • Anxiety Relief · 85% of verified reviews
  • Value · 78% of verified reviews
Quality & Trust Score
97 Strong Evidence
★★★★☆ 4.7 (581) 9 sources
See breakdown →
Manufacturing92
Lab Verification70
Review Consensus100
Brand-verified ·Third-party lab tested (heavy metals, contaminants)GMP-certified manufacturing by Source NaturalsPremium ingredient sourcing with bioavailable formsClean FDA regulatory recordPositive consumer reviews and community feedbackAuthorized distribution channel verified
Referenced by  Dr. Joseph Mercola, Annie Fenn, MD & Dr. Jack Kruse + 4 more →
$18.99
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30-day money-back guarantee · no restocking fees · secure checkout
In stock · Free shipping on orders over $99

Ingredients & product label

The complete ingredient list and product label have not yet been published for this item. Please check the manufacturer’s label or contact us before ordering if you need to confirm an ingredient or allergen.

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About Source Naturals - L-Theanine 200mg 30 capsules

Source Naturals L-Theanine delivers 200mg of the free-form amino acid naturally found in green tea, formulated to support relaxed alertness and a calm mental state without sedation. It's a straightforward, single-ingredient option for adults seeking to maintain focus and ease everyday stress.

Why It's Worth Considering: The 200mg dose per serving aligns with commonly studied amounts, and Source Naturals uses free-form L-Theanine for efficient absorption without unnecessary additives.

Why Gabriel Recommends This

Quality & Trust Score: 97 Strong Evidence
Quality Verified
Source Naturals products are evaluated across 50+ quality signals including manufacturing standards, lab verification, and ingredient sourcing transparency.
Label details
Ingredient amounts and serving sizes are shown in the product label section when supplier information is available.
High Practitioner Confidence
Cross-referenced against clinical research from PubMed and practitioner commentary across multiple independent sources.
Manufacturing Standards
Source Naturals 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 Quality & Trust 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

Follow the directions on the label. Product-specific guidance hasn't been published for this item yet.
Ask Gabriel about timing & dosing →

Real Reviews. Real Sources.

4.7
581 reviews
5 star
75%
4 star
15%
3 star
5%
2 star
3%
1 star
2%
All (581)
10 Clinical Research
iHerb
198 iHerb
Amazon
213 Amazon
7 Practitioners
Reddit
48 Reddit
X
30 X
TikTok
28 TikTok
Instagram
21 Instagram
Substack
6 Substack
581 ratings aggregated across 9 sources · full-text reviews below
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Apotheca's Analysis · 50+ Signals Across 6 Dimensions
L-Theanine is widely praised for promoting calm focus and reducing anxiety without sedation, especially when paired with caffeine.
Focus
92%
Calm
88%
Anxiety Relief
85%
Value
78%
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Compatibility Guide

Compatibility Data Loading

Apotheca is analyzing ingredient interactions, stacking compatibility, and timing recommendations for Source Naturals - L-Theanine 200mg 30 capsules. This data will be available soon.

Research Behind This

Source Naturals Product Quality Assessment
Quality & Trust Score Analysis
This product has been evaluated across 50+ quality signals including third-party testing, manufacturing standards, ingredient sourcing, and clinical evidence. Source Naturals products are analyzed against our comprehensive database of practitioner-grade supplements.
Practitioner Network Endorsement Data
Apotheca Practitioner Intelligence
Source Naturals 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
Source Naturals is part of Gabriel's curated marketplace of practitioner-grade supplement brands. Every product from Source Naturals 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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Source Naturals
Source Naturals - L-Theanine 200mg 30 capsules
97
Strong Evidence
Quality & Trust Score
Top-tier quality across all scoring pillars. Recommended with high confidence.
Last updated: September 08, 2026
Score Breakdown
Manufacturing & GMP
92
Lab Verification
70
Review Consensus
100
Practitioner Confidence
64.0
Community & Social
63
Transparency
70
Consumer & Practitioner Intelligence
★★★★☆ 4.7 from 581 reviews across 9 sources
Clinical Research 30Practitioner Data 7Amazon 213iHerb 198Community 133+
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 Quality & Trust Score works