Vitamin D deficiency rickets (rickets for short) is a systemic chronic nutritional disease characterized by skeletal lesions caused by abnormal calcium and phosphorus metabolism in the body due to VitD deficiency, resulting in incomplete mineralization of bone tissue during the growth period. Rickets not only affects the normal growth and development of children, but also is related to VitD deficiency-related diseases, and is one of the four diseases that are the focus of pediatric prevention and treatment in China. The occurrence of rickets is closely related to poor lifestyle, and rickets can be prevented and controlled entirely through comprehensive prevention and control measures of scientific child-rearing. Preventive measures: Prevention during pregnancy Pregnant women should be active outdoors frequently and eat foods rich in calcium and phosphorus. Women whose gestation period is autumn and winter should take appropriate VitD supplements 400-1000
U/day. VitAD preparations should be used to avoid VitA poisoning, and VitA intake should be <10,000 U/day. Prevention for infants and young children 1. Outdoor activities: Parents should bring their infants to outdoor activities as early as possible, gradually up to 1~2 hours/day, exposing infants' body parts such as head, face, hands and feet as much as possible. 2.VitD supplementation: Infants (including exclusively breastfed children) should take VitD 400 U/day for 2 weeks after birth until 2 years of age.
VitD supplementation should include the VitD content in food, sunlight exposure, VitD preparations and VitD fortified foods. If infants consume 500 ml of formula daily, they can consume about 200 VitD
U, coupled with appropriate outdoor activities (especially in summer when there are more outdoor activities), there is no need for additional VitD supplementation. 3, high-risk groups supplementation: premature babies, low birth weight babies, multiple births should be supplemented with VitD 800 ~ 1000 U / day, and after 3 months to 400 U / d.