An infant six month to 12 months needs approximately 600 milligrams of calcium daily. Mostly, the calcium is used for bone formation, growth, and maintenance. However, calcium is also critical for such vital functions as nerve conduction, muscle contraction, and blood clotting. The calcium for these functions is well guarded by the body and is maintained at the expense of bone in the face of inadequate calcium intake. Babies receive adequate calcium from formula and breastmilk.
Vitamin D is necessary for the optimal absorption of calcium.
When a baby is weaned, his diet should supply at least 16 ounces of milk or equivalent to help meet this need for calcium. Iron is necessary for the proper formation of red blood cells. At birth, an infant possesses body stores of iron sufficient to sustain red blood cell production for 4 to 6 months. If supplemental iron is not supplied after that time, progressive iron deficiency can occur. An infant age 6mo.