I have a bunch of buddies who I wanna share my homebrew with, BUT! They are really skeptical about it's "safety". Everyone who ever shared their brew with buddies who don't homebrew or even heard of it has encountered this before. And I know what some of you might say. "Hey if they don't want it, then more for you!" I know, but you know the feeling of serving something you're proud of to people and getting to see their reactions on it(I bake too so I love that feeling when people are surprised that I made those cookies or cake). I've tried explaining everything to them as simple as possible, but they say they need "Proof" not just my word, but physical/scientific proof that my homebrew is safe to drink. Is there anything you guys can suggest for me to do or say to give them their proof?