That the cooking of milk, even pasteurizing it, greatly impairs its food value is well known. Eggs and vegetables, like cabbage, cauliflower, onions, etc., rich in sulphur, have their sulphur oxidized. They should never be cooked. Phosphorus is also oxidized. The iron in food is ruined as food.

Iodine and manganese are oxidized at low temperatures.

Cooking produces changes in the sulphur content of eggs that cause it to form gas in the intestine of many who eat them. This gas is not only offensive, it is harmful.