CleanGuide · Last reviewed 26 October 2026
Supplement testing sites compared: Labdoor, ConsumerLab, Clean Label Project, Informed Sport and CleanAssay
If you buy supplements in the UK or EU, which testing site actually covers the product in your basket? Here is what each one does, based only on their own public pages (checked 26 October 2026). We don’t rate other sites’ results.
At a glance
| Site | Who and where | Who does the testing | What you can read, and the cost | How it makes money | Made for UK/EU buyers? |
|---|---|---|---|---|---|
| Labdoor | US company; tests products bought from US retail and online shops | Labdoor buys products and sends them to an FDA-registered lab; brands can also pay for a 12-month Quality Certification subscription | Grades, rankings and reports free to read | A share of purchases made through its site, and testing/certification services for brands | No: US shops and US$ |
| ConsumerLab | US company; 1,400+ product reviews | ConsumerLab’s own testing programme; it also runs a paid quality certification programme and seal for brands | Most reviews for members only: from US$75 a year (US$125 for 2 years), or US$20 a month | Memberships; free newsletter and a public recalls and warnings page | No: US market and US$ |
| Clean Label Project | US non-profit; samples bought “across America” | ISO 17025 partner labs; heavy metals, pesticides and plasticisers, judged mainly against California Prop 65 | Certified product list is free; per-lot results are published for products in its Transparency Project | Donations, grants and certification fees from brands that use the CLP mark | No: US shops |
| Informed Sport | Run by LGC, UK (ISO 17025 lab, UKAS 1187); global | LGC tests every batch of certified products for 285+ substances banned in sport | Free batch search (pass, not figures) | Voluntary certification that supplement companies sign up to | Partly: a banned-substance check for athletes, not a heavy-metal database |
| CleanAssay | Independent directory of EU and UK sellers | We do not test products ourselves: we open, check and link each brand’s independent lab report (lab, batch and date where given) | Free, no account. Lead, cadmium, mercury and arsenic in mg/kg from each report, next to EU limits | Affiliate links labelled (Ad) and labelled sponsorship; testing status can’t be bought | Yes: EU and UK sellers, € and £ never mixed, English and Spanish |
Prices and programmes are as shown on each site on 26 October 2026 and can change. Names are trademarks of their owners; CleanAssay is not affiliated with any of them.
Which one to use
- Competing in tested sport? Check the batch number on Informed Sport first.
- Buying a US product, or happy to pay? Labdoor (free) and ConsumerLab (membership) test many US-market products.
- Buying from a UK or EU shop and want the heavy-metal numbers? Use CleanAssay: products from EU and UK sellers, the original lab report linked, figures next to EU limits, € and £ prices kept separate.
FAQ
Is Labdoor or ConsumerLab useful if I buy supplements in the UK or EU?
Both mainly test products sold in the US and show US$ prices, so the exact product, formula or batch you can buy in a UK or EU shop may not have been tested. Check the brand and pack size match. CleanAssay lists only products from EU and UK sellers, with the lab report for that product linked.
Does CleanAssay test supplements itself?
No. We do not buy and test products. We open the independent lab report a brand or lab has published, check who tested it, which batch and when, and copy the figures exactly. If a product has no usable report, we say so. You can vote for products you want reports for on our Request a test page.
Is Informed Sport a heavy-metal test?
No. Informed Sport, run by the UK lab LGC, checks every batch of certified products for substances banned in sport. It is the right check for tested athletes. It does not publish heavy-metal figures; for lead, cadmium, mercury and arsenic you need a separate lab report.
Is CleanAssay free?
Yes. Every lab result, score and comparison is free to read without an account. We earn from affiliate links, always labelled (Ad), and labelled sponsorship. Neither can change a product’s testing status or score.
- How we decide a product is Lab verified →
- How to read a lab report yourself →
- Lab-tested supplements you can buy in the UK →
- Request a test →
Sources
- Labdoor: About us (how products are tested, how Labdoor makes money)
- Labdoor: Quality Certification Program for brands
- ConsumerLab: Become a member (prices)
- ConsumerLab: Recalls and warnings
- Clean Label Project: Certification
- Clean Label Project: FAQ (how CLP is funded)
- Informed Sport: FAQ
- Informed Sport: Science and testing
Information only, not medical advice.