VENDOR REVIEW DP Zhengzhou Depu Technology

[DjJoshua]

Did my first order date 3/31/26 got the goods on 4/15/26 Very happy with the communication with the vendor (Dora) Dora showed me a pre shipping pic of my order and there was one item missing. I pointed that out and Dora contacted the warehouse and fixed it ASAP..When the package arrived I did get all that I ordered. Over all I was very happy with this vendor..

I will keep Dora on the upper part of my list 😛

 

[DjJoshua]

Update.... different color caps??

When printing the COA for this shipment, I noticed that the vial caps on my Retatrutide (R20) were blue, while the COA showed red caps. I reached out to Dora to ask if she had a matching COA for the blue-capped vials:

[8:57 PM, 4/15/2026] Josh: the reta20 the caps are blue. your COA has a red cap. do you have a matching reta20 COA for the blue vials?
[8:59 PM, 4/15/2026] Dora / DP: Sorry, no. The color of the lid can sometimes change. If you have any requirements, I can have the factory pay attention to that next time.
You can rest assured about the quality - if the concentration is less than 99%, I'll give you a full refund..

I did ask for the COA in advance before I ordered.
[8:56 PM, 3/29/2026] Josh: Do you have RT20 332-5 and 10am in stock. and the price please. and any COA's
[9:42 PM, 3/29/2026] Dora / DP: https://janoshik.com/tests/85130-RT20_5KGU8YPBNJ7M

Personally, I don’t like surprises when it comes to compounds. I’ve already shipped one vial off for independent testing even endotoxins. I’ll update my review once I have the new results.

 

[dancs]

Update.... different color caps??

When printing the COA for this shipment, I noticed that the vial caps on my Retatrutide (R20) were blue, while the COA showed red caps. I reached out to Dora to ask if she had a matching COA for the blue-capped vials:

[8:57 PM, 4/15/2026] Josh: the reta20 the caps are blue. your COA has a red cap. do you have a matching reta20 COA for the blue vials?
[8:59 PM, 4/15/2026] Dora / DP: Sorry, no. The color of the lid can sometimes change. If you have any requirements, I can have the factory pay attention to that next time.
You can rest assured about the quality - if the concentration is less than 99%, I'll give you a full refund..

I did ask for the COA in advance before I ordered.
[8:56 PM, 3/29/2026] Josh: Do you have RT20 332-5 and 10am in stock. and the price please. and any COA's
[9:42 PM, 3/29/2026] Dora / DP: https://janoshik.com/tests/85130-RT20_5KGU8YPBNJ7M

Personally, I don’t like surprises when it comes to compounds. I’ve already shipped one vial off for independent testing even endotoxins. I’ll update my review once I have the new results.

Any update yet?

 

[dancs]

I ordered back on April 24 (Friday night).

Received tracking on the 27th (Monday).

Received package May 7 (Thursday).

From CN to MD.

Happy.

 

[DjJoshua]

Any update yet?

not yet still on hold

 

[DjJoshua]

5/14/26 update..........
Key Results Breakdown
Chromatographic Purity: >99.9% top-tier/pharmaceutical-like.
Actual Content: 20.4 mg (labeled 20 mg) 101.9% of label claim i feel it's accurate for mixing and dosing.
Identity: Mass Spectral Match ID Confirmed Correct molecule verified.

Endotoxins: <0.5 EU (below limit of quantification) Excellent. Very low endotoxin levels. I try to target <0.05–10 EU/mg or similar, being below detection is ideal.
Overall Assessment Personaly I feel this is one of the best-looking COAs so far for Retatrutide in the research peptide space. It meets or exceeds industry standards for high-quality research peptides.

Third-party tested by Krause Analytical (a lab used by several peptide vendors).
Recent testing (May 2026).
Full transparency with HPLC-UV/MS methods.
Clean microbiology.
I always try to give credit when credit is due and this kit is top notch.