Everything in this cluster is theory until you ask
You can learn to read a Certificate of Analysis in twenty minutes. Getting one in front of you is the harder half, and it’s the half that separates brands that have documents from brands that have a paragraph about their commitment to quality.
This page is the practical version: where to find your lot number, what to send, what to check when something comes back, and what each kind of non-answer tells you.
Step 1 — find your lot number
You need it. Without it you will be sent a document about some other batch, which is worth very little.
The lot number is usually printed rather than part of the label design — ink-jetted, sometimes slightly smudged, near the expiration date. Check, in order:
- The base of a bottle or jar.
- The crimp or bottom seam of a tube or tincture box.
- The back panel near the barcode on a carton or pouch.
- The foil or blister backing on strips and single-dose formats.
It’ll look like B24H001, SO103517, LOT43521, KJ112501 — those are four real ones from our own products. Formats vary wildly; there’s no standard. Photograph it rather than transcribing, because a single mistyped character sends the request into a void.
If you genuinely can’t find it, ask for the COA covering the batch shipped to you on your order date. A brand with real batch records can resolve that. A brand that can’t has answered a different question you didn’t know you’d asked.
Step 2 — the email
Short, specific, and hard to answer with a brochure. Adapt freely:
Subject: COA request — lot [YOUR LOT NUMBER]
Hello,
I’d like the Certificate of Analysis for [product name], lot [lot number], which I bought on [date].
Could you send the document itself as a PDF rather than a summary? I’m specifically looking for:
- which panels were run (identity, potency, heavy metals, pesticides, microbiological)
- the specification limits alongside the results
- the testing laboratory and its accreditation
If any of those panels weren’t run for this lot, I’d rather know that than not.
Thanks, [name]
Three deliberate choices in there, and they’re the difference between a useful reply and a polite one.
“The document itself, not a summary.” A summary table cost us a claim we nearly published — the supplier summary said one thing and the underlying documents said another. Ask for the artefact.
“Which panels were run.” This pre-empts the most common evasion, which is a genuine document for a thin panel presented as though it settles everything. Absence of a test is not a passing test.
“If any weren’t run, I’d rather know.” This is the load-bearing sentence. It makes the honest answer easy and the evasive answer conspicuous, and it’s the one most likely to get you a straight reply from a small brand that has nothing to hide but does have gaps.
Step 3 — check the reply against five things
When a PDF lands, this takes about ninety seconds.
1. Does the lot number match your bottle? Exactly. Not the product name — the lot. A mismatch means you’ve been handed a document about a different batch, and everything in it is about somebody else’s product.
2. Is there a Specification column? Results without limits can’t be judged. Three of our own six documents lack one, and we’d rather you noticed that than took our word for the results.
3. Which panels are present? Write down what’s missing as well as what’s there. Microbiology-only is the industry floor.
4. Are the results measurements or verdicts? 0.1652 mcg is a measurement. Complies, Pass, Less than [the limit] are verdicts. Both can be legitimate — for pathogens a verdict is the right answer — but a document made entirely of verdicts has told you a batch passed without letting you check by how much.
5. Whose letterhead is it on? The manufacturer’s own, or an outside laboratory’s? Both are common. The tier and the depth of testing are independent variables, and our own range demonstrates that in the least flattering possible direction.
Step 4 — grade the response, not just the document
The shape of a reply is often more informative than its contents.
Sends the lot-matched PDF, unprompted, including the thin parts. Best case. Rare. This brand thinks in batches, which means they have batch records, which is most of what you wanted to know.
Sends a PDF for a different lot. Usually not evasion — often the only one they have on hand. Ask whether lot-specific documents exist for every batch. The answer tells you whether testing is routine or occasional.
Sends a summary table or a screenshot of a certifications page. Push once, politely, for the underlying document. This is precisely the failure mode this cluster exists to describe, and it is very frequently innocent — somebody in customer service sent what they had access to.
Sends a badge image, a paragraph about their standards, or a link to an “our quality” page. They’ve answered a question you didn’t ask. Ask again, naming the lot.
Says COAs are proprietary or confidential. Consider what a passing result would need protecting from. There are legitimate confidentiality interests in a COA — a supplier’s identity, sometimes a method — and none of them require withholding whether a metals panel was run.
No reply. After a second attempt and a reasonable wait, that is itself the answer.
There’s no fixed timetable this should happen on, but a fortnight is a fair yardstick: a brand that runs routine batch testing has these filed and can forward one. A brand that has to go and ask its contract manufacturer will take longer, and the delay is telling you where the documents actually live.
What you’ll get from us, stated in advance
Email us with the lot number from your bottle and we’ll send that lot’s Certificate of Analysis. So that the offer isn’t doing more work than it should, here is what will arrive:
- Lion’s Mane Capsules — depending on the lot, a document with actives, a heavy-metals panel and microbiology, or one with metals and microbiology but no potency figure.
- Mushroom Focus Strips — our most complete document: identity on four species, potency against label claim, metals, pesticides, microbiology, and the physical set.
- Reishi Relax Gummies, Cordyceps Energy Gummies, Energy & Cognition Drops — a microbiological panel, with no specification column, and no identity, potency or metals data. That is genuinely all there is for these three.
We would rather you knew the shape of that before you asked than after. Batch Certificates of Analysis are available on request, and the request is worth making even where the answer is thin — a thin document you can read still beats a badge you can’t check.
The one-line version
Photograph the lot number. Ask for the PDF for that lot, and for the panels that weren’t run. Then read the specification column before the results.
Everything else in this cluster is detail on those three sentences: what the document is, what it can’t tell you, and what the certificates behind the facility mean.