never tried. but i take probolic which is also supposed to be a 12 hour protein. its supposed to last for 12 hours because you got whey at 2-3 hours, casein at 6-8 and soy however long that takes to digest. and some of the protein powders are supposed to have a micro encapsulating coating or some shit on them which take a while to break down until your intestines can actually digest the protein. so if its anything like that then i suppose it can last for 12 hours