Calcium is one of the important macronutrients in the human body and is an essential nutrient in the growth and development of children. In the body, 99% of calcium is concentrated in bones and teeth, the remaining 1%, half of which is chelated with citric acid or combined with proteins, and the other half exists in the blood, extracellular fluid and soft tissues in an ionic state, which is small but maintains a dynamic balance between calcium in the body and bones. Calcium in the body is not constant, but in a constant state of renewal, only invisible to the naked eye. Infants and toddlers are growing fast, and the calcium in their bodies is in a state of partial renewal every day, so it is especially important for them to take calcium supplements. Generally, the calcium in the bones of infants and toddlers is renewed once every 1 to 2 years, and then gradually slows down with age, while adults renew once in about 10 to 12 years. What are the symptoms of calcium deficiency in babies? Childhood, especially infants, is in a rapid growth and development stage, and the demand for calcium is correspondingly large. Therefore, babies need to be provided with sufficient calcium continuously since birth in order to ensure normal growth and development, and make bones and teeth grow strong and sturdy. If you suspect that your baby is deficient in calcium, you can go to the hospital for a check-up and correct it as soon as possible. Calcium deficiency can not only affect children’s growth and development, especially height growth, but can also cause other problems. Mild calcium deficiency can show some of the following symptoms, such as irritability, crying, restless sleep or easy to wake up, easy to jump, sweating, occipital hair loss circle, backward teething, etc. Serious calcium deficiency can cause rickets, and even cause various skeletal deformities, such as square skull, ping-pong head, bracelet or ankle bracelet, rib exostosis, chicken chest or funnel chest, O-leg or X-leg, etc. In addition, hypotonia, backward motor function development, abnormal cerebral cortex function, indifferent expression, delayed language development, and low immunity can also be observed. These symptoms can also appear in children with vitamin D deficiency. Whether your baby is deficient in calcium or not, you must first analyze your baby’s diet to see if the amount of calcium obtained from the quality of your baby’s diet is adequate, and secondly, you must understand your baby’s performance. Secondly, how to prevent cramps in babies? In sunny seasons, human skin can produce more vitamin D by sunlight. Vitamin D can help the body absorb calcium from food, and it also helps the deposition of calcium in the bones. If children are provided with less food containing calcium and more vitamin D in spring, calcium in the child’s blood will be deposited to the bones and cause a decrease in the concentration of calcium in the blood, thus causing the child’s hands and feet to twitch, which is commonly referred to as “cramps”, a condition also seen in children who take more vitamin D and less calcium intake. To prevent the occurrence of cramps, be sure to provide adequate calcium along with vitamin D supplementation. Generally, children who consume 400 to 450 ml of formula or milk daily have an adequate intake of calcium. Recipes for children should also include other calcium-rich foods, such as soy products and shrimp skin. Children who drink enough formula can take vitamin D supplements every other day. Third, what foods are rich in calcium and also suitable for babies? The human body’s need for calcium varies with age, gender and physiological condition. According to the recommended daily dietary supply of calcium revised by the Chinese Nutrition Society in 1988: 1-6 months, 300 mg/day for breastfed children and 400 mg/day for artificially fed children; 6-12 months, 400 mg/day; 1-4 years, 600 mg/day; 4-11 years, 800 mg/day; 11-18 years, 1000 mg/day. In daily life, the main source of calcium is still through dietary supplementation, i.e., consuming more calcium-rich foods, such as milk and milk products, soybeans and soy products, shrimp, shrimp, sesame paste, etc. For all children, it is important to consume dairy foods every day, because milk and dairy products are rich in calcium and are well absorbed and utilized, such as 1 bottle of milk (220 ml) contains about 200 mg of calcium, if you can drink 1 to 2 bottles of fresh milk every day, you can get 200 to 400 mg of calcium, plus the calcium in other foods, together to meet the needs of children for 1 day. It is worth mentioning that cheese is also high in calcium and parents can make their own vegetable cheeseburgers to increase their calcium intake. Children who do not like to drink milk can switch to yogurt. In addition, beans and soy products are also high in calcium, and it is best to consume 25 to 50 grams per day.