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.
Vitamin D Testing. The most accurate way to measure how much vitamin D is in your body is the 25-hydroxy vitamin D test or 25(OH)D test. Vitamin D changes into an active form of the vitamin in the kidney and can be measured through a blood test. The normal range is 30.0 to 74.0 nanograms per milliliter (ng/mL).A lower level indicates vitamin D deficiency, which you should discuss with your doctor.he Vitamin D Council also recommends testing your vitamin D level again in 3 months if you were found to be insufficient or deficient on your first test. You can make changes in your sun exposure to increase your bodies production of vitamin D and/or take vitamin D supplements.