I’ve tried peptides from other places and have mostly had mild to somewhat bad side effects, especially a lot of heartburn and gastrointestinal distress due to what I’m guessing was impurities or bacterial growth in vials. Since going with Cert Pep, those have all disappeared, and it all feels much cleaner and legit. Not to mention their customer service is impeccable, like seriously the best; always respond to questions, concerns, and I’ve even had the owner reach out to me directly multiple times when I’ve had issues with an order, and each time he’s offered me a discount for the inconvenience. They also have a super informative website and send a 3 ml syringe with each order. I found cert pep on trust pilot and I’m so happy I did. Overall, very impressed.