Calcium is important for You and Ur unborn child..4

Calcium is important for You and Ur unborn child..4
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6..  RDA for Calcium
The recommended Dietary Allowances (RDAs) for calcium are 1,300mg per day for older children and teens aged 9-18, 1,000mg per day for adults aged 19-50 and 1,200mg per day for the elderly over the age of 70. However, women should increase their intake of calcium to 1,200mg per day already in their fifties (men only after the age of 70). The tolerable upper intake levels for teens are 3,000mg per day and 2,500mg per day for adults. Excessively high intakes of calcium may result in hypercalcemia, decreased absorption of other minerals and impaired kidney function.

 7..  Health Benefits of Calcium
As it was mentioned earlier, calcium’s major role in the body is to help bones grow and to keep them strong. Low rates of calcium intake tend to be highly correlated with low bone mass and elevated bone fracture rates. This mineral is also needed to help teeth develop fully and then to protect them from decay. About 99% of all the calcium in the human body is present in the bones and teeth. The remaining portion is found in tissues and fluids, including the blood. The calcium present in these parts of the body has the following functions:
  • Aids in regulating heartbeat
  • Conducts nerve impulses that send messages through the central nervous system
  • Helps blood vessel and muscle contraction and expansion
  • Lowers blood pressure
  • Regulates fluid balance by controlling the flow of water into and out of the cells
  • Stimulates enzyme and hormone secretion
  • Triggers the formation of blood clots
Some studies indicate that increased consumption of calcium may lower the risk of colorectal cancer but other studies suggest that it may actually increase the risk of prostate cancer. Furthermore, one recent observational study published in the journal Heart found that consumption of calcium supplements nearly doubles the risk of heart attack. Hence, not all of the aforementioned health benefits of calcium are without controversy.

8..   Calcium Deficiency
Calcium deficiency simply means that people have inadequate stores of calcium. This can result from poor diet, decreased calcium absorption or increased calcium excretion. The body’s calcium stores are constantly being depleted through shed hair, skin, nails, sweat, feces and urine. Moreover, calcium can only be absorbed in the digestive tract if the body also has an adequate supply of vitamin D.
When calcium levels in the body fall too low, the bones have to supply calcium to tissues and fluids so that normal biological functions can continue. As a result, calcium deficiency can cause the bones to weaken, raising the risk of fracture and increasing the risk of osteoporosis. A person will typically not experience any symptoms of calcium deficiency while the body will be depleting the calcium stores in the bones. Low blood calcium known as hypocalcemia is usually not caused by a lack of dietary calcium but is a result of other medical conditions or use of medications. In extreme cases, hypocalcemia can cause abnormal heart rhythms and may even be fatal.


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