Diet and health statement

A. protein is the basic substance that constitutes human cells. The growth and development of human body and the renewal of tissues are inseparable from protein. In addition, protein can be decomposed to provide energy for human physiological activities, so a certain amount of protein should be ingested every day, so A is correct;

B. Grease is a nutrient substance needed by human body and a spare energy substance in human body. It is impossible to ban eating fat, so B is wrong;

C coarse grains contain more vitamin B 1 and vitamin e, and vegetables are rich in vitamins, so c is correct;

D. We should also pay attention to the reasonable intake of essential elements. Insufficient or excessive intake is not conducive to human health. For example, iodine is the main element in the synthesis of thyroid hormone, and insufficient or excessive intake will lead to goiter, so D is correct.

So choose B.