Quote Originally Posted by sawtoothwave

She did say that SOME labs can flag it for not foaming and test further
I would place more credence on established biological fact rather than words coming out of the mouth if some product rep. Who's to say that shes not saying all of this in an effort to spur sales of the Canadian QF? Even if they went on the test further, an unexpired batch will still clear the validity checks as perscribed by the SAMHSA division of the DHHS (the regulatory body that oversees operations of certified labs) - in which Uric Acid is NOT part of. There are no standards established for Uric Acid, as they are for S/G and creatinine. Therefore, its improper for a lab to fail a sample without having any established standards to go by. All labs certified by the DHHS have to perform the validity tests perscribed and must apply the criteria for "substituted" samples as outlined by the DHHS.