Certified Peptides reviews

Reviewers often praise customer service, quick shipping, easy ordering, and product quality. Some report shipping delays, packaging concerns, or problems with discounts and support contact details. Buyers also mention fair prices and helpful COA testing.

What buyers mention most

• Shipping

  Many reviewers describe delivery as fast and on time, with tracking or shipping updates. Others report delayed parcels or carrier problems.

  See 42 reviews about Shipping

• Customer service

  Reviewers frequently praise helpful, professional support and quick responses. One reviewer says the listed support email was undeliverable, and another reports no replacement offer after carrier problems.

  See 36 reviews about Customer service

• Ordering

  Reviewers often describe ordering as easy, smooth, and straightforward. One reviewer reports confusion over applying a discount, and another says an order arrived with the wrong item before support sent the correct one.

  See 24 reviews about Ordering

• Product quality

  Many reviewers praise product quality. One reviewer reports products arrived dried and brittle on two orders, with a cap open on one.

  See 31 reviews about Product quality

• Packaging and COAs

  Reviews differ on packaging: some praise careful or professional packing, while others describe loose vials in an envelope or a label covering the vial. Reviewers also mention COAs and batch testing, including testing for endotoxins and heavy metals.

  See 13 reviews about Packaging 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.

  Read more

• Michael P.

  Verified purchase

  Aug 14, 2026

  Still waiting on delayed parcels

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

• Diana K.

  Verified purchase

  Aug 13, 2026

  Great service and carefully packed orders

  Never disappoints! As far as I’m concerned this company is totally on top of their game! Their research compounds are perfection every time, packed with care and accuracy. Their customer service is great with real people answering the phone every time I’ve called. No one else does that! Love Certified peptides! Thank you so much!

  Read more