Prime Peptides Reviews

Public, Per-Batch COAs With a Verification Key

Every product's Certificate of Analysis is posted directly on the site with batch numbers and purity percentages, and Janoshik-tested batches include a verification key usable at Janoshik's own independent public portal.

Fast, Reliable Domestic Shipping

Same-day FedEx 2-Day Air dispatch from California on weekday orders, with customers consistently reporting quick delivery.

Responsive to Defective Orders

Multiple reviews describe the company promptly replacing gelled or defective vials and resolving order issues through email support.

Strong Aggregate Customer Rating

Trustpilot shows roughly a 4.6/5 rating across 61 reviews, with the large majority at 5 stars, reflecting a largely satisfied customer base.

Detailed Manufacturing Transparency

The About Us page gives an unusually specific, technical account of its production process (WFI-grade water, excipients, sterile filtration, lyophilization cycle length), more disclosure than typical for this market segment.

December 2024 FDA Warning Letter

The FDA issued a formal warning letter to Prime Vitality, Inc. dba Prime Peptides for marketing semaglutide, tirzepatide, and retatrutide as unapproved new drugs, despite research-use-only labeling — a serious, verifiable regulatory action, not just a community rumor.

Inconsistent Lab Sourcing Across Batches

While Janoshik Analytical is the primary lab, the live COA archive shows several other, lesser-established labs used for other batches, making cross-batch quality harder to verify uniformly.

Reported Purity Variability

Third-party review aggregators note that while claimed purity is typically 98-99%+, some batches have tested lower, with occasional reports of COA-to-lot mismatches.

Defective Product Reports

At least one documented review describes receiving multiple vials that had "gelled up", a sign of degradation or formulation issues, though the company did replace them.

Partial Shipments of Out-of-Stock Items

A negative review describes the company allowing orders for out-of-stock items, then shipping a partial order with no clear timeframe given for the remaining items.

US-Only Shipping, No Dedicated Payment Policy Page

No international shipping is offered, and full payment method details had to be inferred from checkout widgets and footer icons rather than a clearly published payments policy.