The most consistent finding in the analytical literature on this market is that labels are unreliable. It undermines every other safety measure, because a dose you cannot verify is a dose you cannot manage.
What testing of purchased products found
Independent analyses of products sold online as selective androgen receptor modulators found that only a minority contained the labelled compound at the labelled amount. Others contained less than stated, a different compound entirely, or no active substance at all.
Some contained unapproved drugs that were not declared anywhere on the label. Anti-doping analytical work has separately documented SARMs and PPARδ agonists present in products sold as ordinary supplements, meaning exposure occurred without any intent to use them.
Why it happens
Raw material passes through several hands before retail. Most sellers are resellers, repackaging bulk powder they did not synthesise and cannot independently verify. Substitution of an expensive compound with a cheaper one is difficult for a buyer to detect and commercially rewarding.
Underdosing is the quieter version of the same problem: it produces a weak effect rather than an obvious failure, and is usually attributed by the user to their own response.
What it means for users
Careful dosing of an unverified product is precision applied to an unknown quantity. Comparing effects between suppliers is not comparing the same compound. And an adverse reaction may be caused by something not listed on the label at all, which is precisely why disclosing the product itself to a clinician matters more than naming the compound.
This is also why community reports diverge so sharply for the same nominal compound. Much of that variation is probably product variation, not individual response.
What reduces exposure
Batch-specific certificates that name the laboratory, method and lot are the minimum. Suppliers who test each production run and can produce the document for the batch you received are meaningfully different from those who publish one certificate for everything.
Independent testing of a purchased unit is the only true verification available to a buyer. Everything short of it is a judgement about the seller's incentives, which is why our vendor comparison weights testing evidence most heavily of any metric.
In short
- Published analyses repeatedly found the wrong compound, wrong dose or undeclared drugs in online products.
- Most sellers are resellers who cannot independently verify what they repackage.
- Product variation likely explains much of the disagreement in community reports.
- Batch-specific certificates and independent testing are the only real verification.
Unfamiliar terminology is defined in our glossary. How we research and grade evidence is set out in our editorial standards, and errors can be reported through corrections.
This article is educational. It is not medical advice, a dosing recommendation, or an endorsement of use. Speak with a qualified medical practitioner about your circumstances.