A resounding “not true!” First of all, all food is dead, unless you graze on grass or take a bite out of a living cow, neither of which is advisable. As far as nutrition goes, microwave cooking is the way to go. Cooking times are short, the temperature is only 100 C and a minimum amount of water is used. These are nutrient-retaining conditions. And incidentally, there is no need to worry about standing near a microwave oven. There is no leakage and even if there were, radio waves do nothing but heat. Bon appétit!