test

av test

METABOLISM

The human body contains approximately 1000g (female) and 1200g (male) calcium, of which 99% is found in bones and teeth.

The remaining calcium is present in an easily exchangeable pool consisting of:

Blood
Extracellular fluid
Intracellular compartments

Free ionized calcium plays vital roles and is therefore tightly regulated at the expense of calcium in bone. Calcium is lost from the body through; faeces, urine, skin, foetal growth and lactation.

These losses must be compensated through calcium absorption from the diet.

Figure Calcium levels are precisely regulated, here illustrated by active (1,25 dihydroxyvitamin D) and inactive (24,25 dihydroxyvitamin D) vitamin D metabolites in plasma.