Studies on Vitamin D3 have shown that clinical test subjects with the lowest blood levels of vitamin D3 had the highest rates of breast cancer, and that breast cancer rates dropped significally as the blood levels of 25-hydroxyvitamin D increased," said study co-author Cedric Garland, Dr.P.H. "The serum level associated with a 50 percent reduction in risk could be maintained by taking 2,000 international units of vitamin D3 daily plus, when the weather permits, spending 10 to 15 minutes a day in the sun.
Cholecalciferol is a form of Vitamin D, also called vitamin D3 or calciol.
Vitamin D3 comes in several forms:
- Cholecalciferol, (also called calciol) which is an inactive, unhydroxylated form of vitamin D3) This is the form found in vitamins and nutritional supplements.
- Calcidiol (also called 25-hydroxyvitamin D3), which is the form measured in the blood to determine vitamin D levels`
- Calcitriol (also called 1,25-dihydroxyvitamin D3), which is the active form of D3 and is classified as a drug. A prescription is required for this form of Vitamin D3 and dosage should be monitored by a physician.
For persons taking higher levels of vitamin D3 for instance 5,000 iu per day, regular CBC/Chemistry blood tests are recommended to guard against a very low risk of kidney toxicity or hypercalcemia (excess calcium in the blood).
Cod liver oil contains large amounts of natural vitamin D3 (not synthetic vitamin D2) Vitamin D3 is an absolute requirement for the utilization of calcium by the body. Cod liver oil can contain up 13,500 iu of vitamin A which is a pretty strong dose. Be extremely careful if you are taking any supplements that contain Vitamin A. chronic intake of the form of vitamin A from animal sources (including cod liver oil) can be toxic, leading to hair loss, confusion, liver damage, and - more recently discovered - bone loss. It is recommended that if you are taking 1 tablespoon of Cod Liver Oil, take it 1 day and then skip a day.
For persons taking higher levels of vitamin D3 for instance 5,000 iu per day, regular CBC/Chemistry blood tests are recommended to guard against a very low risk of kidney toxicity or hypercalcemia (excess calcium in the blood). |
