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Double Wood Supplements

L-Theanine Supplement

Cognition · Capsule · 120 servings

Label snapshot

What the label says

What the product contains and what one serving costs, according to our catalog. Label amounts are not personal dose recommendations.

Active per serving
L-Theanine 200 mg
Form
Capsule
List price (catalog, USD)
$19.95
Price per serving
$0.17List price divided by servings per container. A per-day cost only if the label serving is once daily.
Full label record: servings, testing, ingredients
Servings per container
120
Catalog monthly estimate
$4.99
Testing disclosure
Brand lists third-party testing and a public certificate of analysis (CoA)Status as recorded in the catalog from brand materials; not independently verified by NO1GEVITY.

Ingredients as listed

IngredientAmount per serving
L-Theanine200 mg

What to check on the label

  • The standardisation line for botanicals (for example 'bacosides 45%' or a branded extract name).
  • For mushroom products, whether the label states fruiting body or mycelium and the extract ratio.
  • Multi-ingredient formulas list each amount below. A long list usually means smaller amounts of each.

Amounts are per label serving as recorded in the catalog and are not a recommendation. Testing status reflects what the brand lists. Nothing here is medical advice.

Editorial score and research-dose calculations

These calculations describe our scoring method. They are not a recommended dose or proof of benefit from this product.

7.7/10
Overall score
#4 / 15 in Cognition

Public lab certificate, tested by independent lab, top 4% value.

Read the evidence (1 study)
Add to compareVisit brand site →
Tier 3
Ingredient RCT (matching dose)
The ingredient was tested in an RCT at the same dose this product sells.
See the 1 supporting study
How we scored this product Show the full breakdown
Dose vs. studies (50%) Why 7.2 of 10. Primary ingredient is L-Theanine (evidence grade B). It delivers 200 mg, inside the studied range of 100–400 mg. Read the rule → 7.2
Transparency (20%) Why 9.0 of 10. Earned points for public certificate of analysis and independent third-party testing and all doses disclosed. Read the rule → 9.0
Value (10%) Why 9.9 of 10. One day at the trial dose costs about $0.17. That is one of the cheaper options in the catalog (23 of 313 by cost per effective day). Read the rule → 9.9
Formulation (10%) Why 5.0 of 10. No published absorption advantage or disadvantage on file. The default of 5 is not a criticism. Read the rule → 5.0 Default. No absorption data on file.
Safety (5%) Why 8.5 of 10. Baseline 5.0. Third-party testing adds 2.0. Public lab certificate adds 1.5. NSF, USP or Informed Choice certification adds 1.5. Active safety signal subtracts 3.0. Read the rule → 8.5
Community sentiment (5%) Why 7.3 of 10. Sentiment across 2 external review source(s) is mixed to positive. Community is a signal about daily use, not proof of effect. Read the rule → 7.3
Composite How this 7.7 is built. 0.50 × 7.2 + 0.20 × 9.0 + 0.10 × 9.9 + 0.10 × 5.0 + 0.05 × 8.5 + 0.05 × 7.3 = 7.7 out of 10. Safety caps applied after. 7.7
7.7 composite
Dose vs. studies50%7.2
Transparency20%9.0
Value10%9.9
Formulation10%5.0
Safety5%8.5
Community5%7.3

Evidence gates dose: the evidence grade sets the ceiling, and the dose decides how much of that ceiling the product reaches. Value = inverse of price-per-trial-dose-day. Community = mean sentiment of external reviews. Safety caps applied after weighting.

This score is our editorial judgment, not a scientific standard. We combine published evidence, dose, price, transparency, and consumer signals into one composite: this is our method, not a peer-reviewed clinical rating. A higher score means a product does better on the factors we weight, not that it is medically proven to work.

Read the full method →

Editorial verdict

Quick verdict

7.7 / 10
Best for
Full trial dose, Public lab certificate, Budget-friendly
Avoid if
No major red flags
Full-dose status
Meets trial dose
Price/month
$5
COA status
Public
Biggest caveat
No significant weaknesses identified in the current scoring framework.
Nearest alternatives
Catalog snapshot. Check linked sources for current price, label and batch-specific testing.
Price verification
Current price: $19.95
Last price check: Sep 01, 2026
Add to compareVisit brand site →
Layer 2 · Context
In plain language

Why this scored this way

This Double Wood Supplements L-Theanine Supplement scores 7.7, making it a strong scorer. It delivers 200mg of L-Theanine, inside the studied range of 100–400mg with grade B evidence (promising human data, not yet comprehensive). Transparency is a clear strength (score: 9.0), with third-party testing and a public lab certificate. At $0.17/day it's priced well for what you get.

What drives the score up

  • Dose-evidence score of 7.2 shows decent alignment with trial doses.
  • Quality transparency of 9.0: tested by independent lab with a public lab certificate.
  • Value score of 9.9 at $0.17/day.
  • L-Theanine is dosed at the full research level with grade B evidence (promising human data, not yet comprehensive).

What drags it down

  • No significant weaknesses identified in the current scoring framework.

Why you'd choose it

  • You want good value at $0.17/day.
  • You want L-Theanine from a Double Wood Supplements product.
  • You prioritise tested by independent lab products with public lab certificates.

Why you might skip it

  • You want a product in a different category.
  • You want a cheaper cognition option.
  • You prefer products with more consumer feedback.
Question 1

Does the molecule work?

The science behind each active ingredient, independent of which brand sells it.

L-Theanine

The 'calm alertness' amino acid from green tea.

1 landmark RCT · US: GRAS · EU: Food supplement
Question 2

Is this bottle good?

The specific product: dose, price, transparency, and what buyers report.

Dose vs research
100% of trial dose
Meets or exceeds the published effective dose
Cost at trial dose
$0.17/day at trial dose
What one effective daily dose actually costs
Transparency
9.0/10 · Public lab certificate (quality: not assessed)
Independent batch testing confirmed
Consumer signals
No consumer signals collected yet
Operational signal only, never used as clinical evidence
Question 3

What's the catch?

Safety flags, transparency gaps, dosing concerns, and recurring buyer complaints.

No major red flags
Public lab certificate, tested by independent lab, dose within range
No safety, transparency, or dose concerns detected at this time.
Plain English

What’s inside

The main ingredients of this product, in plain language.

L-Theanine200 mgEvidence B

The 'calm alertness' amino acid from green tea.

Read about L-Theanine →
Layer 3 · Evidence vault

Product data & verification

Hard numbers and independently checked status. Expand each block for its source.

The numbers

Price
$20
per bottle · 120 servings
Dose vs. research
of trial dose 100%
of published effective dose
$ / day at studied dose
$0.17
what one effective daily dose costs
$ / g active
$0.83
per gram of active substance
Independently checked

Data verification

COA status
Public
Evidence grade
B
Per-ingredient breakdown
BL-Theanine

All product data is checked against original sources. Prices, doses, and testing status are updated when product pages change. Evidence grades are reviewed when new human RCTs are published. Read how we verify.

What's inside

Ingredient
Dose in this product
Trial dose
Evidence
L-Theanine
The 'calm alertness' amino acid from green tea.
Williams et al. 2020
200 mg 100% of trial dose
200 mg
3.6 /5
High confidence
336 reviews across 3 platforms (5 sources)
Source diversity: 85%
Examine.comRedditTrustpilot
PraiseExamine's theanine page says the current evidence supports reduced stress and an
Last checked: 2026-08-20

Consumer signals

Consumer signals gathered from 5 platforms.

Low confidence, small sample

Consumer sentiment compiled from 2 public sources (Examine.com, Reddit). Small sample size, treat as directional only.

Reddit

1 thread discussed · mixed sentiment

Themes

One Reddit user says they used Double Wood for Alpha-GPC and L-theanine without issues, describing a fine experience. Elsewhere on Reddit...

Compiled from a Reddit r/Nootropics listing located during manual research; not independently re-verified against the live page at build time.

Examine.com

positive sentiment

Praise

Examine's theanine page says the current evidence supports reduced stress and anxiety in acutely stressful situations, plus some cognitiv...

Compiled from an Examine.com listing located during manual research; not independently re-verified against the live page at build time.

Trustpilot

169 reviews · 3.8/5

Trustpilot International

3.2/5

Same brand profile on Trustpilot country sites: New Zealand 3.6.

These are consumer sentiment signals. They do not measure whether the product actually works. See our evidence section for that.

What others say (unverified)

We aggregated external reviews. We didn't check their methodology. None of them are paid placements from us, but we can't guarantee the sources themselves received no product.

Reddit r/Nootropics
mixed

One Reddit user says they used Double Wood for Alpha-GPC and L-theanine without issues, describing a fine experience. Elsewhere on Reddit, a separate detailed complaint says a different Double Wood capsule product had no effect at the labeled dose, suggesting inconsistent potency across the line.

Read source → Unverified · we received no payment for this listing
Examine.com
positive

Examine's theanine page says the current evidence supports reduced stress and anxiety in acutely stressful situations, plus some cognitive benefits like attention and memory. It reports no known adverse effects or toxicity concerns at supplement doses.

Read source → Unverified · we received no payment for this listing
Layer 3 · Evidence vault

Evidence, claims & regulation

Published evidence, claim checks, regulatory status and what could not be verified.

Evidence

Research behind this product

The studies that established the trial dose and evidence grade for each active ingredient in this product. Click through to read the original paper.

L-TheanineWilliams et al. 2020

What we could not verify

We list this openly. If a claim isn't backed by a source we can trace, we'd rather flag it than repeat it.

  • Trustpilot aggregator
    3.8/5169 reviews

    This is a brand-level customer-service profile for doublewood; it does not isolate L-Theanine Supplement.

    verified 2026-08-07Open source →
  • Reddit r/Supplements community forum
    mixed sentiment

    Community discussion exists, with generally positive comments about L-theanine’s effects on anxiety, stress, and caffeine-related jitters, alongside some reports of tolerance or needing higher doses. No single Reddit thread is treated as a representative product review.

    no direct URLchecked 2026-08-07
Important to know
L-TheanineVery safe. Suntheanine® is the branded form with the most published data.

Editorial notes

Standard 200mg L-theanine, mid-range for the ingredient (typical doses 100-400mg). Also included in Double Wood's Sleep Stack bundle alongside magnesium and apigenin.

Go deeper

Where this sits

Actives inside
L-Theanine
Category
See all in Cognition →
Brand
Double Wood Supplements profile →
Add to compare Visit brand site →
Brand owners

Spot an error?

If you are the manufacturer or brand owner of L-Theanine Supplement and believe any data on this page is incorrect (wrong dose, wrong ingredient, wrong price, missing certification, outdated status), you can request a correction.

We review every request, verify it against primary sources, and publish any accepted change with a dated note. Corrections from brand owners are treated the same as corrections from anyone else: verified before they move.

Request a correction →
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