No. it foams for me if I push it to fast via the filter. Seems to still work fine after. The only thing is that the filter does take some absorption, thus loss of an amount of product+fluid. Unavoidable, you could flush the filter with a little BAC after to get more peptide out of the filter. They do have smaller filters that will waist less, but I still use 13mm filters. Check out randy's video
