The whole idea of paying a lab to test is so that you can trust the lab. Go ahead and pick the cheapest lab. But if you're going do that, you might as well skip testing altogether. Just ask ChatGPT whether your peptides are safe. From the little I heard from Janoshik about Peptide Tests, he seems to rank them as being above his other competitors. Using them will save you some money due to less expensive shipping, but as others have noted, most vendors won't give a refund based upon a negative Peptide Tests result. Since the goal is to save money, just pass on buying Hospira water. The stuff from your sink is good enough.