Pepsynth Labs

Pepsynth Labs is a United States research-material storefront. Its domain was registered in October 2025 and uses proxy registration. The public About page does not provide verifiable company details. The site publishes a support email and phone number.

The live WooCommerce Store API listed 33 products in this review. PeptidePrices added current, comparison-ready rows only for identifiable research compounds and excluded capsules and unclear blends. The affiliate links retain a_aid=peptideprices. Code peptideprices gives customers 10% off.

Pepsynth does not publish a central public COA library. Six of 33 product pages linked a report. PeptidePrices checked 19 supplied Prime Analytical Laboratories record numbers against the issuer's portal. Eighteen matched the issuer's records. The supplied TB-500 PDF for RP214-09Mar26-2 differs from Prime's record. Prime lists TB-500 10mg and Not TB-500. The supplied PDF lists TB-500 5mg and TB-500. Pepsynth says it requested a documentation update after asking the lab to analyze the full TB-4 sequence. PeptidePrices has not received a corrected Prime-issued record or a lot mapping for current inventory. Most reports list the sample lot as Not Provided and have limited test panels. Pinealon linked an Epithalon report, and Oxytocin linked a Semax report. These limits reduce the COA score.