The calorific value of most ready to eat cereals is higher than that of bread (233 cal/100gm).
The breakfast cereals are deficient in lysine but since they are eaten along with milk rich in lysine, this is of less importance. Some ready to eat breakfast cereals are supplemented with proteins.
About 50 per cent of thiamin is destroyed during preparation of shredded wheat and 100 per cent in puffed and flaking. While riboflavin and niacin. Pyridoxine and folic acid are not affected. Extrusion cooking causes 50-66 % of vitamin E loss. So the cereals are enriched with these nutrients.