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WeightWorld Vitamin D3 4000 IU
Product analysis · WeightWorld

WeightWorld Vitamin D3 4000 IU

D3 · Tablet

Why this score?
Testing & evidence
22/25
Ingredient/formulation quality
16/20
Value
17/20
Dose transparency
14/15
Manufacturer transparency
9/10
Label/ingredient transparency
7/10
Displayed points and weights are rounded; the total uses unrounded weights. Pending dimensions are excluded. Provisional scores may change after review.
Testing transparency: 22/25
£8.99Amazon
TabletFormat
4,000 IU / 100 µgDaily dose
400 tabletsPack size
£0.02Price/day
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We may earn a commission from qualifying purchases. This never affects our scores.

The score, explained

Our scoring methodology
Testing & evidence85.9/100
22 points contributed · weighting 25
Ingredient/formulation quality80/100
16 points contributed · weighting 20
Value86/100
17 points contributed · weighting 20
Dose transparency95/100
14 points contributed · weighting 15
Manufacturer transparency85/100
9 points contributed · weighting 10
Label/ingredient transparency67/100
7 points contributed · weighting 10

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

Testing & evidence

Verified independent evidence

Evidence status
Verified independent evidence
Manufacturer statement
Attached to test report no. 26C22329 ... TESTING COMPLIANCE CERTIFICATE ... Sample description: WEIGHTWORLD VITAMIN D3 40001U 400 TABLETS - BATCH CODE: 429462 ... The analyzed sample is compliant ... Vitamin D3 100 μg/tablet ...
Laboratory
Neotron Spa
Certification body
Not recorded
Batch
429462
Batch-specific report
Recorded
Report date
Not recorded
Evidence checked
2026-09-14 11:22:54

Dose & value

Vitamin form
D3Tablet
Daily dose
4,000 IU100µgAt adult upper limit
Serving size
1 tablet
Pack size
400 tablets
Servings per day
1
Price per day
£0.02
Price last checked
2026-09-11 17:44:17

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.

Vitamin D formulation details

Comparison type (D2 / D3 / D3 + K2)
D3
Vitamin form (D2 / D3)
D3
IU / serving
4000
Micrograms / serving
100
IU / day
4000
Micrograms / day
100
Micrograms printed on label
Not disclosed
D3 source, where disclosed
Lanolin
Vegan D3 (yes / no / unknown / not applicable)
no
K2 included (yes / no / unknown)
no
K2 form
Not included
K2 / serving (micrograms)
Not disclosed
Carrier oil, where disclosed
Not disclosed
Pack size as labelled
400 tablets
Recommended serving / frequency
1 tablet daily
Comparison basis for a label serving range
Not disclosed
Additional active ingredients
No additional active ingredient declared
Allergen statement
Not disclosed; check current pack
Vegan / vegetarian label status
Vegetarian; lanolin-derived D3

Product sources & research notes

Listing and manufacturer details describe the label; they do not independently verify product claims. Check the current pack before use.

Ingredients & suitability

Vegetarian

Excipients
Vitamin D3 (as Cholecalciferol) (Source: Lanolin), Bulking Agents: Dicalcium Phosphate and Microcrystalline Cellulose, Anti-Caking Agent: Silicon Dioxide.
Allergens
Not disclosed; check current pack
Carrier / source
Not disclosed
Other active ingredients
No additional active ingredient declared

Manufacturer transparency

Brand
WeightWorld
Legal company
Comfort Click Ltd
Manufacturing model
Third-party contract manufacturing
Manufacturing location
United Kingdom (majority of products)

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

Igennus Vegan Vitamin D3 1000 IU

Why this score?
Testing & evidence
21/25
Ingredient/formulation quality
16/20
Value
11/20
Dose transparency
14/15
Manufacturer transparency
7/10
Label/ingredient transparency
7/10
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
Recognised certification
Manufacturer statement
Nutrasource registry page states: "IGEN™ Certified" and "This product has PASSED because it does not contain detectable amounts of genetically engineered GMO proteins and genes included in the IGEN™ testing panel."
Laboratory
Not recorded
Certification body
Nutrasource IGEN™
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-14 11:33:24
£0.05per day
£19.99per pack
View AnalysisBuy Nowon Amazon
Compare alternative

Nutravita Vitamin D3 4000 IU Softgels

Why this score?
Testing & evidence
3/25
Ingredient/formulation quality
16/20
Value
18/20
Dose transparency
14/15
Manufacturer transparency
9/10
Label/ingredient transparency
7/10
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
Nutravita’s Ingredients page says: “any ingredient selected goes through strict testing to make sure it complies with EU standards” and “The testing is done in-house at the manufacturing site…”; the product page also says “Laboratory tested products.”
Laboratory
Not recorded
Certification body
Not recorded
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-14 11:16:53
£0.02per day
£7.64per pack
View AnalysisBuy Nowon Amazon
Compare alternative

WeightWorld Vitamin D3 2000 IU + K2

Why this score?
Testing & evidence
3/25
Ingredient/formulation quality
18/20
Value
16/20
Dose transparency
14/15
Manufacturer transparency
9/10
Label/ingredient transparency
7/10
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
Manufacturer page says: "Third-party lab tested — View Certificate" and "All our products undergo thorough research and testing before they hit the market."
Laboratory
Not recorded
Certification body
Not recorded
Batch
Not recorded
Batch-specific report
Not established in this record
Report date
Not recorded
Evidence checked
2026-09-14 11:21:45
£0.03per day
£9.49per pack
View AnalysisBuy Nowon Amazon