A good source of calcium contains a substantial amount of calcium in relation to its calorie content and contributes at least 10 percent of the U.R Recommended Dietary Allowance (U.D RDA) foe calcium in a selected serving size. The US. RDA for calcium is 1,000 milligrams per day.  The U.S RDA given is for adults (except pregnant or lactating women) and children over 4 years of age.  Calcium absorption is depending upon the calcium needs of the body, the food eaten, and the amount of calcium in the food eaten.

Vitamin D is essential for calcium absorption.  Vitamin D, whether from diet or exposure to the ultraviolet light of sun, increases calcium absorption. Calcium absorption tends to decrease with increase age for both men and women.

Magnesium is a mineral needed by every cell of the body.  Magnesium is needed for more than 300 biochemical reactions in the body, It helps maintain normal muscle and never function, keeps heart rhythm steady, and bones strong. It is also involved in energy metabolism and protein synthesis.

Zinc stimulates the activity of approximately 100 enzymes, which are substances that promote biochemical reactions in the body, Zinc supports a healthy immune system, is need for wound healing, helps maintain your sense of taste and smell, and is needed for DNA synthesis.  Zinc also supports normal growth and development during pregnancy, childhood, and adolescence.