YC Yiwu Changtu
also known as Changtu Peptides
Vials tend to hold more than the label (median +7.9%); 3 of 13 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
10 vials measured · 3 emptyPurity
9 vials measured- Median purity
- 99.69%
- across 9 vials
- Median dose vs label
- +7.9%
- across 10 vials; + means more than the label
- Failed vials
- 19.6%
- 3 of 13 vials; the rate weights each lab report equally and recent reports more, as the score does
- Lab reports
- 10
- Nov 15, 2024 to Feb 11, 2026
Labs: Janoshik, Peptide Test
Key facts
- VendorVerify holds third-party lab results for 13 YC vials from 10 lab reports, dated Nov 2024 to Feb 2026.
- 3 of 13 YC vials failed: empty, under 95% pure, more than 20% under the label or more than 50% over it.
- The median YC vial tested at 99.69% purity across 9 vials with a purity result.
- The median YC vial held +7.9% compared with its label across 10 vials where the lab measured the amount.
- Buyers have had 5 different compounds from YC lab tested.
- YC ranks #27 of 30 ranked vendors on the VendorVerify score.
- YC vials on file were tested by Janoshik, Peptide Test.
By peptide
| Peptide | Vials | Failed | Median purity | Median dose vs label | Dose vs label, −20% to +20% |
|---|---|---|---|---|---|
| Tirzepatide | 8 | 0 | 99.72% | +7.1% | |
| Tesofensine | 2 | 2 | — | — | — |
| HCG | 1 | 0 | — | +13.1% | |
| NAD+ | 1 | 1 | — | — | — |
| Retatrutide | 1 | 0 | 99.43% | +8.2% |
Lab reports
One row per tested vial, newest first.
| Date | Peptide | Lab | Label | Measured | Dose vs label | Purity |
|---|---|---|---|---|---|---|
| Feb 11, 2026 | HCGBatch Mfg: DEC 19 2025 (green cap) | Janoshik | 10000 mg | 11310 mg | +13.1% | — |
| Apr 24, 2025 | TirzepatideBatch AFAFAMf T30 pink cap MFG Mar 2 | Peptide Test | 30 mg | 33.996 mg | +13.3% | 99.92% |
| Apr 15, 2025 | TirzepatideBatch Pink Cap March 2025 | Janoshik | 30 mg | 32.24 mg | +7.5% | 99.38% |
| Apr 15, 2025 | TirzepatideBatch Pink Cap March 2025 | Janoshik | 30 mg | 31.06 mg | +3.5% | 99.36% |
| Apr 7, 2025 | TirzepatideBatch Yiwu Changtu Green Cap Mfg 2/02/2025 | Peptide Test | 40 mg | 40.508 mg | +1.3% | 99.86% |
| Apr 2, 2025 | RetatrutideBatch Yiwu Changtu March 2nd 2025 | Janoshik | 30 mg | 32.47 mg | +8.2% | 99.43% |
| Apr 2, 2025 | TirzepatideBatch Yiwu Changtu March 2nd 2025 | Janoshik | 60 mg | 62.79 mg | +4.6% | 99.69% |
| Apr 2, 2025 | TirzepatideBatch Yiwu Changtu orange cap | Peptide Test | 60 mg | 64.086 mg | +6.8% | 99.76% |
| Apr 2, 2025 | TirzepatideBatch Yiwu Changtu orange cap | Peptide Test | 60 mg | 68.418 mg | +14.0% | 99.82% |
| Nov 21, 2024 | NAD+Batch Bronze top | Janoshik | 500 mg | 0 mg | Empty | — |
YC: common questions
Is YC 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: 3 of 13 YC vials on file failed, meaning they were empty, under 95% pure, more than 20% under the label or more than 50% over it. That places YC #27 of 30 ranked vendors, below market on our score. Results on file run from Nov 2024 to Feb 2026.
Has YC been third-party tested?
Yes. We hold results for 13 YC vials from 10 lab reports, tested by Janoshik, Peptide Test. Each result comes from a lab report a buyer paid for, not from a certificate the vendor supplied.
Are YC vials dosed correctly?
Across 10 vials where the lab measured the amount, the median YC vial held +7.9% compared with its label. 3 of 13 held more than 10% less than the label said.
How pure is YC?
The median YC vial tested at 99.69% purity across 9 vials 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 YC 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 YC 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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