The topic of human health

A, children and adolescents will suffer from rickets and dysplasia due to calcium deficiency, and the elderly are prone to osteoporosis and fractures due to calcium deficiency; Therefore, A is correct;

B, human iodine deficiency can cause goiter; Therefore, B is correct;

C, fruits and vegetables contain a lot of vitamins; Therefore, C is correct;

D, excessive intake of essential elements is unacceptable. For example, excessive intake of selenium can make people toxic, and excessive intake of iodine can also cause goiter; So, d is wrong;

Because the choice of topic requirements is incorrect, the answer is: D.