Phil at Phnomemon has a great post with a lot of obvious advice that the legal departments of most well known travel publications wouldn’t touch with ten barge poles, but most right thinking foodies should take note of,
A good guide to judging the stupidity of a food is that if the locals
believe primarily that a food will give you strength or vitality in the
pants department rather than chiefly eating it because it tastes
appealing. Some foods stay as provincial delicacies for one of three
reasons: they’re either shit, endangered or they kill you. If snake’s
blood was really that delicious, McDonald’s would have a
cobra-flavoured sundae. I’m all for eating new and random (but not
endangered) things but remember to keep your expectations very low and
your bowels at maximum readiness.
FWIW, I have experienced degrees of looseness in Phnom Penh. Not enough to significantly knock me off my stride, but enough to quicken my step back to the hotel.