There was a great post about filtering—from a nurse I believe—who was talking about microscopic inorganic compounds in our lypholized vials that can enter the body and cause all sorts of complications. There may be lil teeny bits of rubber or metal from vial production in addition to bacteria and other microorganisms—filtering takes care of all of this.
@BNLFL turned me on to Biologix, who makes sterile 13mm PES 0.22 micron filters about $50 USD for 100. Don’t get non-sterile filters; it defeats the point and is a waste of money. Biologix shipped fast, and they’re a well-respected brand. (I’ve used their lab culture media when I was in college, and just ordered some to run my own sterility experiments.) All that peace of mind for $0.50!
Filters do nothing for endotoxins unless you get positively charged filters which trap gram negative bacteria endos, but everything I’ve learned so far indicates they may ruin your peptide as well if the peptide solution itself is negatively charged.
It’s SO easy to do and quick! Like less than 2 minutes. You can pre-wet the filter with BAC and then after either flush with air or BAC to get the most out of your peptides. I’ve only air flushed so far as I’m still refining my supply and work flow, but have found based on volume that I’m not losing much trapped in the filter.
Plus it gives you the mad scientist feels!