To be clear so we’re talking about the same thing, I’m referring to US companies that sell “not for human consumption” products, like Umbrella Labs or Kimera Chems. There is definitely no legal recourse if you complain to them you’ve taken their product and had a sever reaction or worse. They also generally are only doing some limited purity testing, like using Janoshik.
Im in Canada and was also thinking about single vial peptide vendors when I made my comment. With the exception of one producer who stopped selling to the public, most are just reselling from China, and all of them sell their products as not for human consumption.
Many risks are taken with limited recourse when exploring this territory, even ordering meds from India or just using drugs off label in an experimental way. I guess we all have to decide what our own comfort level is when seeking to further our health and longevity.