[gytdev]

I was using it as well, but after talking to my very knowledgeable dentist, pressure cookers destroy most of the vitamins from foods. Since talking to her I started using my pot without the pressure valve, semi open, and use it as a small simmering device, similar to a pot on a stove, but without needing to remember to turn it off.

[fsw]

What? That's the absolute opposite of what happens. More vitamins are retained in the food in a pressure cooker because of less water/more steam and less oxygen.