Vitmin D works by increasing the calcium absorption in the intestine and promoting bone mineralization. It also affects some neuromuscular reactions, independent of the calcium levels. Both hypercalcemia (increased serum calcium) and hypervitaminosis D (increased Vitamin D) could occur independent of each other, though hypercalcemia is a common manifestation of hypervitaminosis D. However hypervitaminosis D can also occur with increased vitamin D supplements, with or without ‘more than necessary’ calcium intake (though increased calcium intake can further aggravate the symptoms). ‘Tingling feet, tinnitis, numbness in jaw’ could be related to altered calcium levels in blood (with or without manifest osteopenia). However there are other established causes that could present similarly infections, inflammations, such as vitamin B12 deficiency, diabetes, hypothyroidism, vascular issues etc. These is best evaluated by your doctor for an accurate diagnosis and appropriate management.
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