here you go, the definitive answer: this clinic uses IP Foods as it's diet program.
http://www.robertusmd.com/public/Gui...istributed.pdf
for soups, it says: "Pour 230 ml of cold water into a shaker, add contents of one packet and shake vigorously until mixture is smooth. Heat
in a microwave for 1 to 2 minutes or in a saucepan over medium heat. Check frequently - do not overheat!"
the trainer may have been working off the mistaken idea that microwaves are radioactive. they're not - they use radio frequency waves, the same things used in ultrasounds and the same reason ultrasounds are dangerous to developing babies: they cause the molecules to move much faster, generating heat. this is why food ends up cooking and why babies can suffer "cavitation", which is basically a steam pocket within their tissues.
contrary to popular belief, microwaving food does NOT break down the nutrients - bec the food is heated for a much shorter period of time, it's actually healthier than (if not as tasty as) conventional cooking. certainly much greener, as micros use a fraction of the hydro used by a stove or oven.