Growth Guys Retatrutide 20mg, batch RET27: purity, mass, endotoxin and price
Checked October 29, 2026 against the Growth Guys shop listings.
On Oct 30, 2026 the Retatrutide 20mg vial was in stock at $150 CAD, which is $7.50 per mg.
- Batch RET27 lists 99.53% purity, a tested mass of 21.49 mg (tested 2026-08-31) and endotoxin of 12.439 EU per vial.
- With DEAL10 and Bitcoin it comes to about $108.
The listing in numbers
| Item | Value |
|---|---|
| Product | Retatrutide 20mg |
| Batch | RET27 |
| Price | $150.00 CAD single vial (in stock), 10-pack $1,200.00 |
| Per mg | $7.50 single vial |
| Listed purity | 99.53% |
| Tested mass | 21.49 mg |
| Purity and mass tested | Janoshik, 2026-08-31 |
| Endotoxin | 12.439 EU per vial (tested 2026-09-02) |
From the Growth Guys product page, Oct 30, 2026. Figures are the vendor's listing for this batch only and can change when a new batch replaces it.
How to read this
- The endotoxin figure is a separate test from purity, run two days after the purity test. Endotoxin results are reported per batch and differ between products, so read this one against its own report.
- The tested mass (21.49 mg) is above the 20 mg label.
- The 10-pack is listed at $1,200, which is 20% below ten single vials.
With DEAL10 and Bitcoin
| Listing | Price | With DEAL10 (10%) | Plus Bitcoin (28% total) |
|---|---|---|---|
| Single vial | $150.00 | $135.00 | $108.00 |
| 10-pack | $1,200.00 | $1,080.00 | $864.00 |
The discounts multiply, 0.90 x 0.80 = 0.72, see the stacking math. The 10-pack price shown is the listed range top, see the 10-pack guide.
Reading the report
- Purity, mass and endotoxin are different results. Purity is the share of the sample that is the target compound, mass is how much was measured in the vial, and endotoxin is a separate test.
- Match the batch number on the report to your vial and confirm the report on the testing lab's own page, see how to find your batch.
What the vendor says about handling
- It needs bacteriostatic water for reconstitution. Whether water is included is covered in the bacteriostatic water guide.
- Per the listing, it is stable at room temperature for short periods such as shipping, and refrigeration is recommended for longer storage. After reconstitution it must be refrigerated and kept away from direct light.
For the wider picture, see the Retatrutide 20mg price guide, the legal status in Canada and the published trial results.
Ready to order?
Enter the code at checkout. If you copied it, just paste it in the Promo code box in the order summary, then press Apply. It does not apply by itself. Confirm the discount line before you pay.
Common questions
What batch is the Growth Guys Retatrutide 20mg?
RET27 when I checked on Oct 30, 2026.
What does the batch report show?
99.53% listed purity and 21.49 mg tested mass by Janoshik on 2026-08-31, with endotoxin of 12.439 EU per vial tested 2026-09-02.
How much is the 20mg vial?
$150 CAD before shipping and tax, or $7.50 per mg. The 10-pack is $1,200.
What does it cost with the code and Bitcoin?
About $108.00, because 0.90 x 0.80 = 0.72 of $150.