Rasa Research

Rasa Research has become my preferred vendor for both Melanotan II and CJC-1295. We're running comparative studies on melanocortin receptor agonists and need reliable sourcing for multiple peptides. Their catalog is extensive and well-organized, which makes ordering straightforward. Both peptides arrived within a week with comprehensive third-party COAs showing >98% purity. What impressed me most was the technical data sheets they include—detailed information on storage conditions, reconstitution protocols, and stability data that many vendors don't bother providing. Their customer service team is responsive and knowledgeable. I had a question about the difference between CJC-1295 with and without DAC, and their rep gave me a thorough explanation with citations. Packaging is excellent with vacuum-sealed vials and cold packs. Prices are reasonable, not the cheapest but fair for the quality. My only minor complaint is that their website checkout process is a bit clunky. Overall, solid vendor for serious research applications.

Ordered Semaglutide for metabolic studies and the vial arrived with visible particles floating in the solution. Reached out to Rasa and they eventually sent a replacement, but it took almost two weeks. Replacement tested fine, but the initial quality control issue is concerning for a premium-priced vendor.