Certified Peptides reviews

Most reviewers praise customer service, quick shipping, easy ordering, and product quality. Buyers also describe prices as fair or low, though some report shipping delays, packaging concerns, and problems with discounts or returns. A few reviewers report poor communication or unresolved shipping issues.

What buyers mention most

• Shipping

  Many buyers describe delivery as fast and on time. Others report delayed parcels or problems with a carrier and no replacement offer.

  See 45 reviews about Shipping

• Customer service

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

  See 37 reviews about Customer service

• Ordering

  Buyers commonly describe ordering and checkout as easy and smooth. One reviewer reports confusion over applying a discount, and another says an order contained the wrong product before support corrected it.

  See 22 reviews about Ordering

• Product quality

  Many reviewers praise product quality. One buyer reports products arrived dried and brittle in recent orders, with one cap open.

  See 33 reviews about Product quality

• Pricing and COAs

  Reviewers describe prices as fair, affordable, or lower than elsewhere, and mention sales and discounts. Buyers also praise COA testing, while one reviewer says a discount offer could not be applied alongside a larger sale.

  See 16 reviews about Pricing and COAs

Reviews behind this summary

• Mitch

  Verified purchase

  Aug 21, 2026

  Good selection, mediocre packaging

  Pros: Fair pricing (with discount code), good selection of products, COA's included testing for endotoxins and heavy metals (not all suppliers go this far with their COAs), easy to order and pay online, shipping speed was ok. Only con: Shipping packaging in my opinion was mediocre -loose vials in a shipping style envelope (could have broken easily with carrier mishandling) and no real temperature control measures.

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• 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 #?