Third-party tested COA on every product Verified brands Heavy-metal screened
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Assay transparency index · Live
26 verified brands · 480 lab-tested products

Know exactly what's in the bottle.

n=480 · third-party verifiedlabel claim vs assayedheavy-metal screened

The transparency-first marketplace for supplements you can actually verify — third-party tested, a certificate of analysis on every product, and label accuracy checked claim against verified.

What's your goal? Showing 18 products
COA on every product Label accuracy checked Brands paid directly
Verified brands

Supplement brands with nothing to hide

Every brand is ID-checked and every product is independently tested before it lists — label accuracy, heavy metals and contaminants.

See all 26 brands
The marketplace

Shop by the numbers

The Assay difference

A lab report on every supplement.

Tap the Lab report badge on any product to open its independent certificate of analysis — label claim vs verified amount, a heavy-metal screen and every certification, in one place.

  • Active ingredients — what the label claims vs what tested
  • Heavy-metal screen — lead, arsenic, cadmium, mercury
  • Microbial and pesticide contaminant panels
  • Batch number matched to the bottle in your hand
Magnesium Glycinate · verified PASS
Magnesium
102%
Glycine
102%
Lead
PASS
BATCH BL-24107TESTED 09 JUN 2026
How Assay works

Transparency is the product, not the marketing.

01Brands get vetted

ID, company registration and manufacturing standards are checked before a brand can list anything at all.

02Products get tested

Every product is third-party tested for label accuracy and heavy metals. No COA on file, no listing on the shelf.

03Results get published

The full certificate of analysis is shown as-is — pass or fail, batch by batch. No cherry-picking the good numbers.

04Brands get paid

Split payouts run straight to each brand. The marketplace never takes custody of anyone's money.

Verified buyers

What buyers say

★★★★★

I finally stopped guessing. The COA showed the magnesium tested at 102% of the label and every heavy metal under limit. That's why I bought it.

HM
Hannah M. Verified buyer · Bristol
★★★★★

As a coach I only recommend Informed Sport products. Being able to open the lab report and the batch number before ordering is a game changer.

DR
Dev R. Verified buyer · Manchester
★★★★

Ordered from three brands in one basket and each parcel arrived tracked with its own COA. No fillers, no vague "proprietary blend" nonsense.

SK
Sofia K. Verified buyer · Leeds
For supplement brands

Put your COAs to work.

Assay runs on the VendPlat HQ, so your storefront, lab reports, orders, stock and payouts all live in one back office that costs nothing to start.

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AssayPremium third-party-tested supplements marketplace theme