third party tested means nothing until you ask three questions

Third party tested appears on almost every supplement website I have ever looked at, including plenty I would not buy from. It sounds like a certification. It is not one.

The phrase has no legal definition, no minimum standard, and nobody checking it. A brand can send one sample to one lab, once, in 2021, and put those three words on the site indefinitely.

Here are the three questions that sort out what it means in any given case.

one, tested for what

This is where most of it collapses. A great many products described as third party tested were tested for identity and potency. Is this collagen, and is there as much as we said.

Useful, and completely different from testing for contaminants. Heavy metals are a separate assay, ordered separately, at extra cost.

Contaminant testing in this category should cover lead, arsenic, cadmium and mercury at minimum. Collagen comes from animal hide and bone, and bone is where lead and cadmium accumulate over an animal's life. That is not a scandal, it is basic biology, and it is exactly why the testing matters.

Consumer Reports found detectable heavy metals across protein drinks back in 2010, and the Clean Label Project has published similar findings on protein powders more recently. This is a known feature of the category, not a rumour.

two, tested when, and how often

Every lot, or once.

This is the question I care most about. Raw material varies by batch, because it comes from different animals, in different places, at different times. A single test in 2021 tells you about one batch in 2021.

Per lot testing is meaningfully more expensive, which is precisely why so few brands do it and why so many prefer the vague phrase.

three, can you see the actual result

Not a badge. Not a sentence in a founder letter. The certificate of analysis, with the lot number on it, the specific analytes, the measured values, the units, and the name of the lab.

Ask yourself whether you could match a can in your hand to a document on their site. If you cannot, the testing may well be real, but it is not something you can verify, and unverifiable is a different category from proven.

a note on the badges that do mean something

NSF Certified for Sport and Informed Sport are real certification programmes with published standards, ongoing audits and retail sampling. Those marks carry weight.

Separately, a California Proposition 65 warning is not automatically a red flag. It is a disclosure law with very low thresholds, and it is sometimes applied defensively. The absence of a warning is not evidence of anything either. Numbers beat warnings in both directions.

where we sit

Every lot tested for heavy metals, and the results published on a page anyone can read without emailing us.

I would rather be judged on a document than trusted on a phrase. If we ever stop publishing, that will tell you something too, and that is the point of doing it this way.

Ask any brand those three questions. Tested for what, how often, and can I see it. The answers arrive fast and they are usually decisive.

LÉS is a beverage, not medicine, and nothing here is medical advice.