Canadian research peptides · independently tested
Canada’s most documented peptide source — 244 independent lab reports, a published purity floor of 93.844%, and domestic shipping.
Growth Guys promo code, verified October 11, 2026: HEALTHYLIFE10 takes 10% off sitewide at Growth Guys (growthguys.com) on any payment method, and it is the code behind the largest total discount available there today — 30% off when the order is paid with Bitcoin, which the store discounts a further 20% automatically, so a $430.00 CAD cart paid $301.00 CAD. The measured cart, line by line.
We are an affiliate: if you order from Growth Guys using this code we earn a commission, at no extra cost to you. We are not Growth Guys and have no ownership of or role in the company.
A supplier tests one good batch and gets a genuine COA. Then thousands of vials — many never tested — are sold against that single report. Every reseller buying from that supplier can show the same document, even though your specific vial was never analyzed. One test, an ocean of untested product riding on it.
A vendor downloads someone else's genuine COA — a competitor's, or their supplier's — and presents it as proof of their product. The document is authentic; it's just not theirs. Posting a real PDF only defeats forgery. It does nothing against a stolen-but-real report.
People check whether a COA looks legitimate and stop there. But authenticity is the floor, not the ceiling. The real questions are: whose sample was tested, and does the result tie to this vendor and this batch?
A synthesis house produces a large batch and tests it once, properly, at an independent laboratory. That report is genuine. The batch is sold in portions to several resellers, each of whom fills vials under its own label and each of whom shows the same report, because it is the only report there is. Nobody has forged anything. Yet the report now stands behind thousands of vials filled in several places under different conditions, and any of those vials may have been contaminated, mislabelled or degraded after the sample was measured. Reuse is the default state of a report that has not been tied to a batch; theft is the exception. Both leave the buyer in the same position.
A vendor downloads a competitor's genuine report, edits the client name and sometimes the batch, and posts it. The edit is invisible in the PDF. It is visible on the laboratory's portal, because the laboratory's record still names the original client and the original batch, and a lookup returns the unedited version. This is the whole reason the location of a report matters more than its appearance: theft is undetectable in a file and trivially detectable in a lookup.
Whose name is in the client field on the laboratory's record? The vendor's: it commissioned the test. A supplier's: the vendor is showing an upstream report, which may be reuse. A competitor's: theft. Does the batch on the record match a batch the vendor is shipping? Yes: the report is about your product. No: it is about something else. How many products does the vendor show this one report under? One: normal. Several: reuse, and the report describes at most one of them.
The remedy for reuse is simple: test your own batch after filling, under your own name, and publish the result. It costs a few hundred dollars per batch. A vendor that resells upstream material and tests its own fills has closed the gap; a vendor that passes along the supplier's report has not, and the two are indistinguishable from the PDF alone. The client field on the laboratory's record is where they differ.
Two vendors showing the same report may simply share a supplier and be honest about it. That is the benign case, and it is still not evidence about either vendor's fills. The distinction that matters to a buyer is not honest versus dishonest; it is tested-after-filling versus not.
Related: why two vendors share a COA · how to read a COA.
🧪 Run the free vendor check →On the vendor referenced above: HEALTHYLIFE10 gives 10% off sitewide at Growth Guys (growthguys.com) whichever way you pay, and 30% off in total with Bitcoin, where a further 20% comes off automatically, with no minimum purchase and no product exclusions.
Not the storefront's word for it. 244 reports from Janoshik Analytical across 133 products, each one opening on the laboratory's own domain rather than as a file the seller could edit. The 181 that carry a purity figure average 99.03% and run from 93.844% up to 99.99%, with the weaker end published rather than trimmed away — which is the only reason the average is worth quoting. Orders ship inside Canada and price in CAD. Every report, counted.