For healthy children, routine bone density testing is not required in the absence of recurrent fractures, bone deformities, or x-rays suggestive of decreased bone mass. The American Academy of Pediatrics guidelines for bone density testing in children are as follows, and the primary indications for bone density testing are for groups of children at risk for osteoporosis. Such as primary bone disease, idiopathic osteoporosis, osteogenesis imperfecta, secondary bone disease, chronic inflammatory diseases, endocrine disorders, chronic activity disorders, systemic use of glucocorticoids, and thalassemia. The clinical indications for bone density testing in the Guidelines for the Treatment of Primary Osteoporosis developed in 2017 in China do not mention children. For children, especially infants and children in the vigorous growth stage, low bone density means being in the rapid growth process, which is a good phenomenon, and there is no need to go for calcium supplementation; too much calcium supplementation will increase the burden on the kidneys and other organs. If the child does not have serious bone problems, it is not necessary to go for a bone density test. Some experts believe that bone density tests for children, as well as trace element tests for children, are not that necessary. The results of all current tests for trace elements do not truly reflect the true levels of macronutrients and trace elements in the body and must be combined with clinically manifested symptoms. The results of these tests cannot be used as clinical diagnostic criteria, nor can they be used as a basis for treatment and medication.