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New Leaf Products L-Theanine 400 mg 400mg – Capsules
Product analysis · New Leaf Products

New Leaf Products L-Theanine 400 mg 400mg – Capsules

Blend · Capsule

Why this score?
Testing & evidence
9/20
Ingredient/formulation quality
21/25
Value
12/20
Dose transparency
15/15
Manufacturer transparency
9/10
Label/ingredient transparency
9/10
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing transparency: 9/20
£9.49Amazon
CapsuleFormat
400 mgDaily dose
120 capsulesPack size
£0.16Price/day
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The score, explained

Our scoring methodology
Testing & evidence45/100
9 points contributed · weighting 20
Ingredient/formulation quality84.1/100
21 points contributed · weighting 25
Value62/100
12 points contributed · weighting 20
Dose transparency97/100
15 points contributed · weighting 15
Manufacturer transparency85/100
9 points contributed · weighting 10
Label/ingredient transparency90.7/100
9 points contributed · weighting 10

The score compares product data, not medical effectiveness or individual suitability. Prime and affiliate commission contribute no points.

Testing & evidence

Testing claimed

Evidence status
Testing claimed
Manufacturer statement
Manufacturer site says: "To ensure the highest safety and quality, our products undergo rigorous testing for heavy metals and unwanted compounds during production to fully comply with global regulations."
Laboratory
Not recorded
Certification body
Not recorded
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-27 11:06:41

Dose & value

Formulation
BlendCapsuleVitamin B6 4 mg
Daily dose
400 mgWithin recommended rangeTypical: 100–400 mg/day
Serving size
2 capsules
Pack size
120 capsules
Servings per day
1
Price per day
£0.16
Price last checked
2026-09-26 17:21:34

Daily cost uses the recorded label serving; a larger dose earns no value advantage. The label serving is not a recommendation for your personal intake.

L-theanine formulation details

Comparison form
Blend
Named L-theanine ingredient
Not disclosed
Caffeine per serving (mg)
Not disclosed
Other active ingredients (summary)
Vitamin B6 4 mg
Standardisation / purity as labelled
Not disclosed
L-theanine per serving as labelled
400 mg per serving
Serving as labelled
2 capsules
Daily amount (mg, single direction only)
400
Other active ingredients
Vitamin B6 4 mg
Pack size as labelled
120 capsules
Recommended serving / frequency
Take two capsules per day with food
Allergen statement
Not disclosed
Vegan / vegetarian label status
Not disclosed

Ingredients & suitability

Excipients
Not disclosed — check the current label
Allergens
Not disclosed
Carrier / source
Not disclosed — check the current label
Other active ingredients
Vitamin B6 4 mg

Manufacturer transparency

Brand
New Leaf Products
Legal company
New Leaf Products Ltd
Manufacturing model
Not conclusively disclosed as in-house
Manufacturing location
United Kingdom

View the full brand profile →

What the record makes clear

  • Active amount is disclosed.
  • Daily cost can be calculated from the recorded serving.

What to keep in mind

  • Verify the current label and the batch covered by any testing report.
  • A product score cannot determine whether you need a supplement.

Explore the alternatives

Compare alternative

Ambervit L-Theanine 400 mg 180 capsules 400mg – Capsules

Why this score?
Testing & evidence
20/20
Ingredient/formulation quality
21/25
Value
15/20
Dose transparency
15/15
Manufacturer transparency
9/10
Label/ingredient transparency
9/10
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Verified independent evidence
Manufacturer statement
Alpha01 product page for the same L-Theanine 400mg product lists 'CERTIFICATIONS & LAB TESTS' and links to batch-specific reports for 'Potency & Active Ingredient Testing', 'Heavy Metals Testing', and 'Microbial Contaminants Testing' for batch LC249531.
Laboratory
SIA "J.S. HAMILTON Baltic"; EUROFINS VITAMIN TESTING DENMARK A/S VEJEN Denmark
Certification body
Not recorded
Batch
LC249531/102028
Batch-specific report
Recorded
Report date
Not recorded
Evidence checked
2026-09-27 10:52:05
£0.11per day
£19.97per pack
View AnalysisBuy Nowon Amazon
Compare alternative

Ov OXFORD VITALITY Oxford Vitality L-Theanine & Caffeine 100mg – Capsules

Why this score?
Testing & evidence
9/20
Ingredient/formulation quality
21/25
Value
20/20
Dose transparency
15/15
Manufacturer transparency
9/10
Label/ingredient transparency
9/10
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Testing claimed
Manufacturer statement
Amazon listing says: "Our supplements have been expertly created to the strictest GMP guidelines in our facility here in the UK, meaning we can guarantee the quality and safety of every product." Oxford Vitality product page also says "Quality Assured ✅" and the product description says the company "independently formulated" the product, but I did not find an independently verifiable third-party test/certification for this specific product.
Laboratory
Not recorded
Certification body
Not recorded
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-27 10:48:55
£0.03per day
£10.99per pack
View AnalysisBuy Nowon Amazon
Compare alternative

Nutrination L-Theanine 400 mg capsules 400mg – Capsules

Why this score?
Testing & evidence
9/20
Ingredient/formulation quality
21/25
Value
19/20
Dose transparency
15/15
Manufacturer transparency
9/10
Label/ingredient transparency
9/10
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing evidence
Evidence status
Testing claimed
Manufacturer statement
Amazon listing and Nutri Nation site both claim testing/certification: Amazon title says "GMP - Certified, Lab Tested"; product imagery says "Third-party Lab Tested"; Nutri Nation site says "GMP CERTIFIED & THIRD PARTY TESTED" and "Made in the USA in NSF and ISO 17025 certified laboratories and third-party tested." I did not find an independently verifiable registry entry or product-specific COA for this exact L-Theanine product.
Laboratory
Not recorded
Certification body
Not recorded
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-27 11:13:42
£0.07per day
£9.99per pack
View AnalysisBuy Nowon Amazon