He is the Co-founder and Chairman of O'Leary Funds and the co-founder of Softkey. He has also previously served as a business journalist on CBC 's The Lang and O'Leary Exchange with Amanda Lang and hosted Redemption Inc.ailed as Canada's business equivalent of Donald Trump, O'Leary is one of Canada's most prominent entrepreneurs, investors, and financial pundits.
When calcium is low and/or a person has symptoms of vitamin D deficiency, such as bone malformation in children (rickets) and bone weakness, softness, or fracture in adults (osteomalacia), 25-hydroxyvitamin D usually is ordered to identify a possible deficiency in vitamin D.
To really know if these symptoms are due to vitamin D toxicity, you need to get some tests done at your doctorâs office. 1  These tests show: 2  Elevated levels of calcium in the serum and urine. 3  Elevated level of 25-hydroxyvitamin D, usually more than 150 ng/ml (375 nmol/L) 4  Parathyroid hormone level usually undetectable.