personally i wouldn't use fat as a laxative. something aint quite right there. while some people notice a laxative effect from coconut oil, or <insert fat here>, it's not a good idea to rely on that as a laxative.
"dean ornish and dr. davis think the palmitic acid our bodies use for fuel while we sleep is poison if we eat it. zero-carbers like charles washington think the oldest fuel in our evolutionary history – glucose - used by organisms a billion years ago and without which the brains of modern mammals cannot survive for more than a few minutes – is an unnatural toxin if you eat it. both views ignore basic facts of medical physiology and defy evolutionary history." - kurt harris