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.
Cart-verified on October 11, 2026: HEALTHYLIFE10 applied 10% off sitewide at Growth Guys (growthguys.com), a Canadian peptide vendor with no minimum purchase and no product exclusions, taking a $100.00 CAD cart to $90.00 CAD.
Concrete math beats "up to X% off," so here it is from an August 2026 cart test:
| Item | List price | With HEALTHYLIFE10 |
|---|---|---|
| Retatrutide 10mg — single vial | $90.00 CAD | $81.00 CAD (−$9.00) |
| Larger orders | — | Same flat 10% off the subtotal, no cap |
The store also surfaces a free-shipping threshold at checkout ($350.00 CAD at the time of the August test), which stacks naturally with the code since the code reduces the subtotal, not the shipping calculation. Check the live cart for current thresholds.
Price is the last thing to compare, not the first. Here's what most people get wrong: they shop the discount before they shop the testing. Growth Guys publishes a Janoshik Analytical certificate of analysis per batch — before ordering from anyone, confirm the COA matches the batch you'd receive (our batch-matching guide shows how), and run the store through the vendor-vetting quiz.
Does HEALTHYLIFE10 work on retatrutide? Yes — flat 10% sitewide with no product exclusions, verified at checkout in October 2026 ($9.00 off the $90.00 CAD single vial).
Is there a bigger retatrutide-specific code? No. All legitimate codes at this store are the same flat 10%; larger advertised discounts on coupon sites are aggregator-generated.
Where do I see the proof the code works? The verified code page keeps a dated checkout screenshot, updated daily.
For research and educational purposes only. Not medical advice.
Cart-verified on October 11, 2026: HEALTHYLIFE10 applied 10% off sitewide at Growth Guys (growthguys.com), a Canadian peptide vendor with no minimum purchase and no product exclusions, taking a $100.00 CAD cart to $90.00 CAD.
Or run the free vendor-check quiz →
23 of the 244 Janoshik reports on the vendor's lab page cover retatrutide, across 5 distinct product listings. 23 of them state a purity figure; those average 99.41%, from 96.27% at the lowest to 99.86% at the highest. That sits above the 99.03% average across all 244 reports the vendor publishes. The report link on each row goes to Janoshik's own site. That is what makes these figures checkable rather than quotable.
| Product | Batch | Purity | Mass | Tested | Lab record |
|---|---|---|---|---|---|
| Retatrutide | RET01 | 96.27% | 10.94 mg | 2024-09-30 | report |
| Retatrutide 30mg | RET28 | 99.81% | 33.62 mg | — | report |
| Retatrutide 20mg | RET27 | 99.53% | 21.49 mg | — | report |
| Retatrutide 10mg | RET26 | 99.82% | 10.69 mg | — | report |
| Retatrutide 60mg | RET25 | 99.55% | 68.33 mg | — | report |
| Retatrutide 20mg | RET24 | 99.69% | 21.56 mg | — | report |
| Retatrutide 10mg | RET23 | 99.69% | 10.99 mg | — | report |
| Retatrutide 60mg | RET22 | 99.79% | 67.03 mg | — | report |
| Retatrutide 10mg | RET21 | 99.56% | 11.56 mg | — | report |
| Retatrutide 10mg | RET19 | 99.55% | 10.02 mg | — | report |
| Retatrutide 20mg | RET17 | 99.75% | 20.93 mg | — | report |
| Retatrutide 10mg | RET16 | 99.3% | 10.46 mg | — | report |
| Retatrutide 60mg | RET15 | 99.86% | 61.24 mg | — | report |
| Retatrutide 20mg | RET14 | 99.18% | 22.09 mg | — | report |
| Retatrutide 20mg | RET13 | 99.73% | 22.35 mg | — | report |
| Retatrutide 20mg | RET12 | 99.43% | 22.19 mg | — | report |
| Retatrutide 10mg | RET11 | 99.52% | 11.79 mg | — | report |
| Retatrutide 20mg | RET10 | 99.72% | 23.85 mg | — | report |
| Retatrutide 20mg | RET08 | 99.68% | 18.77 mg | — | report |
| Retatrutide 20mg | RET06 | 98.45% | 20.79 mg | — | report |
| Retatrutide | RET06 | 99.6% | 11.19 mg | — | report |
| Retatrutide 10mg | RET05 | 99.4% | 10.31 mg | — | report |
| Retatrutide | RET04 | 99.65% | 12.11 mg | — | report |
Every run re-reads the vendor's published lab page, which is why this table can shrink as well as grow. What it contains is analysis — mass, purity, batch identifier, test date — and nothing else. All 244 reports, every compound.
Testing: 244 Janoshik reports across 133 products, 99.03% mean purity over the 181 that state a figure, 93.844% to 99.99%, each hosted on the testing lab's domain. Shipping: from inside Canada, in Canadian dollars, with no customs step for a Canadian buyer. Time: the vendor has been answering publicly in its own forum threads since November 2021. All of it, itemised.
See the HEALTHYLIFE10 cart reading for October 11, 2026. Every daily test, back to the first on record, is kept in the HEALTHYLIFE10 dated cart archive.