Adding a datapoint rather than asking anything.
The thing nobody tells you is that the certificate is about one batch. Not the product. One batch.
Tried to verify a COA myself by emailing the lab on it. Never heard back. Not sure if that means anything.
The Institute testing page has 1 published Epitalon report if you want actual numbers rather than vibes.
Thanks in advance, this community is usually pretty good about this stuff.
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Worth separating two things here. Purity tells you what fraction of the material is the target compound. Identity tells you whether the target compound is what the label says. A product can pass one and fail the other, and they are different assays.
Mass spec gives you molecular weight, which confirms identity but says nothing about whether the sequence is correct. Two different peptides can share a mass.
If you want to check this yourself, ask the vendor which laboratory issued the certificate, then email that laboratory with the report number. Most will confirm or deny. The ones that go quiet tell you something.
Been saying this for years.
Batch-to-batch variation is the thing people underestimate. A passing result certifies one lot, not a product line, and vendors know most buyers do not make that distinction.
For anyone arriving from search: the compound reference page has the evidence grading, and the testing tab has the actual results. Two different things, easy to conflate.
JO jonas ·
Not accusing anyone of anything, I just do not think a number means much until you can see what is behind it.