Last time, I talked about how microwave ovens work. The principle is just a different pathway to the same result - apply heat. But thanks to some very poor science, many people wrongly believe that cooking food in your kitchen "nuker" will not only destroy the nutritional goodness in your food, but will also mutate the previously-benign nutrients into cancer-causing chemicals.
Many websites have jumped on the bandwagon, and make even wilder claims about microwaved food such as "causes long-term permanent brain damage by shorting out electrical impulses in the brain" and "minerals, vitamins and nutrient of all microwaved food is reduced or altered so that the human body gets little or no benefit". They use pseudo-scientific gibberish such as "a degeneration and destabilisation of the external energy activated potentials of food utilization within the process of human metabolism".
In the literature that claims that microwaved food is depleted in nutrients and/or is full of carcinogenic chemicals, two studies are continually quoted. The first is from the December 9, 1989 issue of Lancet, while the second is that of Hertel and Blanc in Switzerland.
The second study (Comparative Study of Food Prepared Conventionally and in the Microwave Oven, published by Raum & Zelt in 1992) looked at levels of various chemicals and cells in the blood of volunteers who ate microwaved food. The study was published in a certain Franz Weber's magazine, modestly called Journal Franz Weber (Issue 19, January-March 1992), which is definitely not a peer-reviewed journal. If it had been, it might have noticed that there were only eight volunteers - which is such a small number, that it's impossible to get any statistically significant results. Furthermore, none of the blood analysis results fell out of the normal range of variation. Indeed, the volunteers, who all ate macrobiotic food, came to the study with a low-grade anaemia. Regardless of this, the study came to the conclusion that "… microwave ovens are more harmful than the Dachau gas chambers…" and "… it is certain that you will die from cancer …".