Calcium has a proportion of 99%, the role of supporting the structure of bones and teeth. The remaining 1% is present in blood, muscles and intercellular fluids. Besides its structural role, calcium also has functional roles: it intervenes in blood coagulation, in muscle contraction, in cardiac activity, in producing milk secretion, it promotes the absorption of vitamin b-12. Gnc calcium 1000 naturally provides the body with calcium, magnesium, zinc and copper, essential for strong, healthy bones and for the good functioning of the body. Calcium is recommended for: - treatment of deficiencies of calcium, magnesium and vitamin c and d; - maintaining the health of the bone system and the teeth; - prevention of spontaneous decalcification and fracture of bones in the elderly; - ensuring regular heartbeats, together with magnesium being responsible for maintaining the health of the cardiovascular system; - an important role in transmitting nerve impulses, being a tonic of the nervous system; - hair and nail growth; - restoring the mineral balance and the ph of the body; - its adjuvant properties in early surgical menopause, premature menopause, amenorrhea (absence of menstruation), increased secretion of the thyroid gland, chronic bowel disease, rheumatoid arthritis, chronic anemia, sequelae after surgery on stomach and intestines, hypocalcemia, hypocalcemia, hypocalcemia with cortisone, nervousness, stress, insomnia, panic attack. Magnesium is found both extracellularly and intracellularly and is considered the fourth most important mineral in the body, helping to initiate contraction of the heart muscle (myocardium). Deficiency (lack of) magnesium in the body influences the heartbeat and predisposes to heart disease. Also, magnesium: helps reduce muscle aches, back aches, decreases muscle cramps (including night time), relaxes muscles and reduces stress, intervenes in the processes of regulating blood ph, reducing free radicals and oxidative stress. Magnes.