I have purchased Tirzepatide from several companies. The product was great, but either to pricey, or I had to use a payment app. that I didn't have are trust. I just hate changing peptide companies, because I didn't know how good the Tirzepatide would be. I read so many good reviews about Certified peptides I decided after a lot of research I would give it a try. I wished I had tried long before now. It works great. The price is a lot cheaper then the other companies I purchased from. No payment issues, and I received it right away. If I could give it more then 5 stars I would.