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What does 99% purity mean peptides — last verified at checkout at Growth Guys (growthguys.com): October 22, 2026 (today) — HEALTHYLIFE10 applied and working, taking $20.00 CAD off a $200.00 CAD cart, exactly 10% off sitewide, with no minimum purchase and no product exclusions.
Purity is a proportion, not a quantity. Explains what the figure does and does not answer, and why mass has to be read beside it.
| Cart subtotal | Discount | Paid | Rate |
|---|---|---|---|
| $200.00 CAD | −$20.00 CAD | $180.00 CAD | 10.0% |
| $70.00 CAD | −$7.00 CAD | $63.00 CAD | 10.0% |
| $55.00 CAD | −$5.50 CAD | $49.50 CAD | 10.0% |
| $50.00 CAD | −$5.00 CAD | $45.00 CAD | 10.0% |
| $80.00 CAD | −$8.00 CAD | $72.00 CAD | 10.0% |
| $50.00 CAD | −$5.00 CAD | $45.00 CAD | 10.0% |
These are separate carts, all built on October 22, 2026, and their values differ by design. A single-value test cannot tell a working code from one with a hidden threshold. Nothing was purchased — the figures come off the guest-cart screen, before any payment step.
Apply it before checkout: HEALTHYLIFE10 in the cart's discount field, confirm the new total, continue. A guest cart is enough — no sign-in, no account, and it stays valid for repeat orders rather than expiring after the first.
Because the claims are the kind you can verify before spending anything. Growth Guys has published 244 Janoshik reports across 133 distinct products — 99.03% average purity, floor 93.844%, ceiling 99.99% — and each report lives on the testing lab's site, not behind a vendor-hosted PDF. Shipping is domestic within Canada in CAD, and the vendor has fielded questions in public forum threads since November 2021. The full distribution is here.
Across the 240 reports published for this vendor as of October 6, 2026, only 178 carry a numeric purity percentage. The other 62 are identity or content tests — they confirm what the material is, or how much of it is in the vial, and report a result without a percentage. That split is not a gap in the record; it is two different questions being asked of two different samples.
A purity figure is an area percentage from chromatography: of the material the instrument detected, this proportion was the target compound. It is silent on how much material was in the vial to begin with. A vial can assay at 99.6% purity and still be underfilled, and a vial can be filled exactly to label and assay at 96%. If you only ever read the purity number, you are reading one of the two tests that matter.
Counting all 178 percentages: the mean is 99.03% and the median is 99.52%, with a range from 93.844% to 99.99%. Ninety-five results (53.4%) land at or above 99.5%. Forty-two (23.6%) sit between 99% and 99.5%. Eight (4.5%) fall between 98% and 99%. Thirty-two (18.0%) land between 95% and 98%, and exactly one result (0.6%) comes in below 95%.
The shape is the interesting part, and it is not a smooth curve. Just over half the set clusters tightly at the top, then the numbers thin out sharply, then a second group of thirty-two reappears in the 95–98% band. A distribution with two clusters rather than one tail is what an unfiltered record tends to look like, because different compounds and different synthesis runs do not behave identically. A single clean peak with nothing below it is the pattern that should prompt questions.
In synthetic peptide work the material that is not the target compound is usually related to the synthesis itself: sequences missing a residue, truncated chains, and the water and counter-ion that come with a lyophilised powder. These are ordinary products of making the peptide, not contamination introduced afterwards, and their share moves with chain length. Longer and more difficult sequences routinely assay lower than short ones from the same facility on the same day.
That is why reading a 96% result as a defect, and a 99.6% result as proof of quality, usually misreads both. The question worth asking is whether the figure is consistent with the compound in question and whether it was published at all. Thirty-three of the reports in this set fall below 98% and are posted alongside the rest rather than removed, which tells you more about the record than any individual percentage in it does.
Where a report gives a mass rather than a percentage, check what the figure covers before comparing it to the label. Six entries in this set are HGH kits, and the product name states the total for the kit while the report covers a single vial out of it. The ratio is consistent across all six at roughly ten to one, which is what a report on one vial of a ten-vial kit looks like.
Divide the reported mass by the kit total and you get about 10%, which reads as a vial holding a tenth of its labelled strength. Compare it instead to one vial's share and the six results land at 100.3%, 97.2%, 106.2%, 102.4%, 99.8% and 109.4% of label — four of the six at or above full strength. The alarming version of that number is an artifact of dividing by the wrong denominator, and we produced it internally before catching it. Match the unit on the report to the unit on the label first; a striking figure is a reason to check how it was derived, not a reason to repeat it.
Yes, as of October 22, 2026. A $200.00 CAD guest cart at growthguys.com lost $20.00 CAD when the code was applied, which is the full 10%. The page carries that test's date, not its own publication date.
No. Purity is an area percentage describing what proportion of the detected material was the target compound. How much material is in the vial is a separate content or mass test. Of the 240 published reports, 178 carry a purity percentage and 62 are identity or content tests.
Thirty-three of the 178 reports that carry a percentage come in under 98%, and they are published alongside the rest. The full range runs from 93.844% to 99.99%, with a median of 99.52%.
Check the denominator before concluding anything. On the six HGH kits in this set the product name states the kit total while the report covers one vial, a ratio of about ten to one. Measured against a single vial's share, those six results fall between 97.2% and 109.4% of label.