Nantong Guangyuan Chemical Co., Ltd. (GYC)

Direct manufacturer and exporter of research-grade peptides, SARMs, and raw compounds based in Nantong, China. Reports independent testing by Janoshik Analytical with COAs available and sells 350+ compounds. WARNING: the site ggpeps.net is a known fraudulent clone of this vendor; use only the official ggpeps.com domain. Independent testing platform Finnrick also retracted GYC test results citing suspected large-scale fraud under the vendor's name; verify current lab results directly before sourcing.

Nantong Guangyuan Chemical Co., Ltd. (GYC) is listed as a bulk wholesaler in the peptide supply chain, serving Asia markets from China (Nantong). As a direct manufacturer, this supplier controls its own production process from synthesis through purification and quality control release testing. Verification is supported by 1 independent source, including documentation review and cross-referencing against public records. This supplier has a moderate confidence score — buyers should perform additional due diligence before engaging.