Considering that vitamin D deficiency is very common in all age groups and that few foods contain vitamin D, daily intake and tolerable upper limit levels is recommended, depending on age and clinical circumstances. It is suggested that adults aged 19–50 year require at least 600 IU/d of vitamin D to maximize bone health and muscle function. It is unknown whether 600 IU/d is enough to provide all the potential nonskeletal health benefits associated with vitamin D. However, to raise the blood level of 25(OH) D consistently above 30 ng/ml may require at least 1500–2000 IU/d of vitamin D.

This is basically a pain relieving surgery for painful knee due to various diseases, most common being Osteoarthritis & Rheumatoid arthritis. Disabling Osteoarthritis is quite frequent in 50 years & older population of UAE due to social & religious habit & practices. The replacement consists of replacing the upper part of the knee with a measured metallic shell, lower part with metal plate with plastic insert on it, the knee cap is replace in about 10% cases only if necessary. The artificial knee has a life of 10 to 14 years depending on how well you use it and it
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