Thinking filtering peptides is doing anything meaningful to protect you is funny. Waste of time and effort. Better just to avoid peptides at that point
And usually filter into new "sterile" vials, ultimately sourced from alibaba either by them or by who they're buying from, that fail independent testing for sterility
The person asked how is tested peptides the same when filtered for the test versus what we take, and it's not unless to filter to remove the bacteria, hair, glass and the other crap he mentioned.
Filtering will remove almost all live bacteria and foreign objects, but not endotoxins,
Which is why an Endo test is way more important the a Sterility test.
You can deal with sterility if you have to or want to, but can't do crap about Endos.
Also people expecting ZERO or near ZERO in thier peptides are living a pipe dream, all we are doing with tssting is trying to keep the vendors somewhat honest and get some sort of idea if the stuff is going to make us sick or not.