Certified Peptides reviews

Buyers often praise customer service, quick shipping, easy ordering, and competitive prices. Many describe products as high quality and mention COAs or testing. Some report delayed shipments, packaging concerns, a wrong item, or difficulty getting a response about a return.

What buyers mention most

• Shipping

  Many buyers report fast or on-time delivery, sometimes with tracking. Others describe delayed parcels or shipping problems, and one buyer says no replacement was offered after carrier issues.

  See 42 reviews about Shipping

• Customer service

  Many reviewers praise helpful, professional support and quick responses. One buyer reports that the listed support email was undeliverable, and another says there was no response about a return.

  See 36 reviews about Customer service

• Ordering

  Buyers often describe ordering and checkout as easy and smooth. One reviewer reports confusion over applying a discount, and another says a wrong item was promptly corrected after contacting support.

  See 21 reviews about Ordering

• Product quality

  Many buyers praise product quality, and some mention batch testing or COAs. One buyer reports that an item arrived dried and brittle on two orders, with a cap open on one.

  See 33 reviews about Product quality

• Pricing

  Reviewers mention fair or low prices, discounts, sales, and good value. One buyer was disappointed by additional shipping costs, and another describes confusion between two discount offers.

  See 16 reviews about Pricing

Reviews behind this summary

• Ike P.

  Verified purchase

  Aug 17, 2026

  Exceptional quality and customer service

  Very impressed with the quality, CP continues to be a reliable source for the highest quality products. I would continue to recommend them because the quality of the customer service as well as the quality of the products are exceptional.

• Michael P.

  Verified purchase

  Aug 14, 2026

  Still waiting on delayed parcels

  Still waiting - delay delay - waiting. FedEx showing “duplicate” parcels same tracking #?

• Krystal B.

  Verified purchase

  Jul 30, 2026

  No response about my return

  I like the research compounds, but I ordered the wrong one and have been trying to get a return for a while now with no response.