SIYU
Vials tend to hold less than the label (median −5.8%); 0 of 1 vials were more than 10% under.
For research use only. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. How scores work
Every vial we have on file
- Within ±5% / purity 99%+
- 5–20% under, overfilled / purity 95–99%
- Failed: over 20% under, over 50% over, empty or under 95% pure
Dose vs label
1 vials measured · 0 emptyPurity
1 vials measured- Median purity
- 99.67%
- across 1 vials
- Median dose vs label
- −5.8%
- across 1 vials; + means more than the label
- Failed vials
- 0.0%
- 0 of 1 vials; the rate weights each lab report equally and recent reports more, as the score does
- Lab reports
- 1
- Aug 27, 2026 to Aug 27, 2026
Labs: Janoshik
Key facts
- VendorVerify holds third-party lab results for 1 SIYU vial from 1 lab report, dated Aug 2026 to Aug 2026.
- 0 of 1 SIYU vials failed: empty, under 95% pure, more than 20% under the label or more than 50% over it.
- The median SIYU vial tested at 99.67% purity across 1 vial with a purity result.
- The median SIYU vial held −5.8% compared with its label across 1 vial where the lab measured the amount.
- Buyers have had 1 different compound from SIYU lab tested.
- SIYU is not ranked because it has fewer than the 5 lab reports a vendor needs to be ranked.
- SIYU vials on file were tested by Janoshik.
By peptide
| Peptide | Vials | Failed | Median purity | Median dose vs label | Dose vs label, −20% to +20% |
|---|---|---|---|---|---|
| GHK-Cu | 1 | 0 | 99.67% | −5.8% |
Lab reports
One row per tested vial, newest first.
| Date | Peptide | Lab | Label | Measured | Dose vs label | Purity |
|---|---|---|---|---|---|---|
| Aug 27, 2026 | GHK-CuBatch Unknown | Janoshik | 50 mg | 47.12 mg | −5.8% | 99.67% |
SIYU: common questions
Is SIYU legit?
We can't vouch for any vendor as a business, and we don't sell or recommend products. What we can show is what buyers' independent lab tests found: 0 of 1 SIYU vials on file failed, meaning they were empty, under 95% pure, more than 20% under the label or more than 50% over it. SIYU has 1 lab report on file, fewer than the 5 needed to be ranked, so treat this as early data. Results on file run from Aug 2026 to Aug 2026.
Has SIYU been third-party tested?
Yes. We hold results for 1 SIYU vial from 1 lab report, tested by Janoshik. Each result comes from a lab report a buyer paid for, not from a certificate the vendor supplied.
Are SIYU vials dosed correctly?
Across 1 vial where the lab measured the amount, the median SIYU vial held −5.8% compared with its label. 0 of 1 held more than 10% less than the label said.
How pure is SIYU?
The median SIYU vial tested at 99.67% purity across 1 vial with a purity result. We count anything under 95% as a failed vial, and a vial at 99.5% or higher gets full marks for purity.
Does SIYU pay to be listed or ranked?
No. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. A vendor's place comes only from lab results.
Will my SIYU vial match these results?
Not necessarily. A lab report describes the vials that were tested, and batches differ. A clean record lowers the odds of a bad vial but doesn't rule one out, which is why newer reports count for more in the score.
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