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.
If you don't get a lot of sun and think you might be deficient, then you need to see a doctor and have your levels of 25-Hydroxy-Vitamin D measured (the storage form of the vitamin). According to the Vitamin D council, a blood level of 50-80 ng/ml (125-200 nmol/L) is your best bet for optimal health and disease prevention.