First of all, it is clear that it is not useful to take calcium tablets for children with chicken breasts. There are three common hypotheses about the cause of chicken breast. The first hypothesis is that the chicken breast is related to the development of the sternum itself. The second hypothesis is that the cause of chicken chest is caused by the development of rib cartilage on both sides of the sternum. The third hypothesis is that it is not the rib cartilage next to the sternum, but the deformity of the nearby ribs. But no matter what, there is no relationship between chicken chest and calcium supplements or calcium deficiency in children, no matter what calcium tablets are used, there is no significant improvement in chicken chest. 90% of chicken chests are significantly aggravated when children are around 10-11 years old and are noticeable during puberty growth, only about 10% of chicken chest children have deformities before the age of 3. The treatment of pectus excavatum can be solved mainly by bracing or surgery, and taking calcium tablets is of little use.