Calcium (40,08 a.m.u.) – the most vital macronutrient in our body. An element of multiple vital processes. 99% of the body calcium is deposed in bone tissue structure, making it strong. Necessary concentration of calcium in our blood is being supported in strict limits thanks to several regulation mechanisms of metabolism processes in bone tissue, absorption in gastro-intestinal tract, reabsorption in kidneys.

Concentration of calcium in hair and nails could vary. Calcium level in these biomaterials is not depending on the level of calcium intake. Increased concentration of calcium in hair could reflect not only overdosed intake, but quite opposite – increased mobilisation and loss of bone calcium (e.g. in cases of osteoporosis in menopause). Decrease of calcium level in hair was registered in myocardial infarction cases, combined with aorta calcification level.

When children are in active growth period and intake increased amounts of calcium, its level in hair could decrease and not reflect the intake level.

Calcium exchange and containing of calcium in tissues is linked with metabolism of other metals and anions: phosphorus, magnesium, iron, zinc, cobalt, potassium, sodium, heavy metals. Calcium metabolism is being changed in stress situations, long-lasting bed regime, kidney pathology, pancreas gland disease and thyroid body disease in case of drugs treatment.