calcium 3

2:44 PM Diposkan oleh Fery Virgantara

Tiens has four calcium supplements all formulated to maintain normal growth and development of strong healthy bones. This range of Calcium supplements is suitable for all dietary needs, including sugarless, vegetarians and children.

Calcium is the most abundant mineral in the body. Its major function is in building and maintaining bone and teeth. Calcium exists in bone primarily in the form of hydroxyapatite. Calcium is also important in much of your body’s enzyme activity as well as contraction of muscles, release of neurotransmitters, maintenance of immune function, production of energy, regulation of heart beat and the correct clotting of blood.

Maximal bone growth occurs in the teenage years, and then bone density in women remains relatively constant until age 30 to 40. After age 40, bone loss typically occurs at rates of 0.5 to 1 per cent per year. In men, this occurs several decades later. Calcium balance is generally positive during growth, neutral in the mature adult, and negative in older adults. Calcium is lost in varying amounts through the faeces, urine, sweat, and sloughed skin cells. Reduced oestrogen levels in women result in reduced calcium absorption and retention, increased bone turnover, and lower bone mass.

Inadequate calcium intake results in reduced bone mass and osteoporosis. In a review of 52 intervention trials investigating calcium's effects on osteoporosis, the vast majority of trials have shown beneficial effects, including better bone balance, greater bone gain during growth, reduced bone loss in the elderly and reduced risk of fracture. Most studies show that long-term calcium supplementation decreases primary fracture rates by 30 to 35 per cent for vertebral bone and 25 per cent for hip bone. It appears supplements must be continued indefinitely since the effects of two years of calcium supplements on bone mineral density are largely lost within two years after discontinuing the supplements.

In the ongoing Nurse's Health Study, with 87,000 participants, supplementary intake of 400 or more milligrams daily of calcium has been associated with a significantly reduced risk of stroke among women. Supplementary intakes higher than 600 milligrams daily did not appear to confer further benefit, so more is not necessarily better!

Calcium supplementation has been found to also have a modest effect on the reduction of systolic blood pressure in those with hypertension. Diastolic blood pressure does not appear to be affected by calcium, and calcium does not affect blood pressure in those with normal levels.

Calcium hydroxyapatite is very bioavailable and is the only form of calcium that promotes bone building activity. To ensure adequate calcium absorption, a daily intake of 400-600 IU of vitamin D is recommended. Calcium absorption can also be improved by the mineral boron, as it helps to reduce the amount of calcium excreted in the urine. Vitamin A and zinc are also important for calcium metabolism and uptake respectively. Cucurbita pepo (pumpkin) extract is rich in zinc. A study of 396 men ranging in age from 45-92 that was published in the September 2004 issue of the American Journal of Clinical Nutrition found a clear correlation between low dietary intake of zinc, low blood levels of the trace mineral, and osteoporosis at the hip and spine. Vitamin C promotes the formation of osteoblast-derived proteins required in bone.

The best natural sources of calcium are milk, cheese, ice cream, yogurt, buttermilk and other dairy products. Other sources include salmon, green leafy vegetables, non-dairy almond drinks and tofu.

Use only as directed. Always read the label.

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