Final answer:
Calcium intake is vital for kids aged 9-18 due to bone development. Girls aged 11-14 should consume 1,200 mg of calcium daily, while children 1-18 require 800-1200 mg/day. Proper absorption of calcium comes from vitamin D levels and dietary factors, with foods like dairy, kale, and fortified cereals being key sources.
Step-by-step explanation:
The adequate intake of calcium is crucial for kids aged 9-18 years as it is a key period of bone growth and density increase. Females aged 11 years and older often do not meet their required calcium intake, which is concerning because a significant portion, 60%, of bone density is developed between the ages of 10 and 16.
Females 11-14 years should aim for 1,200 milligrams of calcium per day which can come from calcium-rich foods such as cheese, yogurt, or green, leafy vegetables. Whereas, children aged 1-18 require 800-1200 mg/day of calcium and adults after 18 years need 800 mg/day. Pregnant or breastfeeding women and women in their 2nd and 3rd term of pregnancy need even more, at 1.2 grams/day.
Calcium absorption in the diet comes predominantly from the upper small intestine and is heavily influenced by vitamin D levels and the acidity levels in the digestive system. Consuming foods rich in organic acids, lactose, and basic amino acids can enhance calcium absorption. T
o prevent conditions like osteoporosis, a diet rich in calcium along with weight-bearing exercise is recommended. Foods high in calcium include milk, cheese, yogurt, and certain vegetables such as kale and broccoli. Fortified products like cereals and juices can also help meet daily requirements.