Is it possible to get too much vitamin D?
Recent announcements by television broadcasters indicated that taking too much vitamin D may cause heart problems. However, the basis for this claim was a study in which 132,000 people hadvitamin D levels above 100 ng/ml. A very small percentage (291 people out of the 132,000) experienced slightly higher occurrences of atrial fibrillation (irregular heartbeat) compared with those with lower levels of vitamin D.
Until the Institute of Medicine recently advised higher levels of vitamin D, the recommended level had been 20 ng/ml. Most researchers and many health care practitioners agree that 20 ng/ml is far too low and that the minimum level should be at least 30 ng/ml, and ideally levels should range from about 40 to 80 ng/ml.
Most Americans (an estimated 70%) do not have sufficient levels of vitamin D, yet broadcasters warn against takAll Postsing too much. Doctors can perform blood tests to determine currentvitamin D levels, and for those who are deficient, supplementation is recommended. However, for the very small minority of those whose levels of vitamin D are more than sufficient (0.22%), supplementation would not be necessary.
Benefits of Vitamin D
Those who had levels of vitamin D between 61 and 80 ng/ml experienced a substantially decreased risk of diabetes compared to those who were vitamin D deficient. In addition, those who had levels between 81 and 100 ng/ml experienced a significant decrease in occurrences ofhypertension compared to those who were deficient.
Reduced Risks in Those With Vitamin D Levels Higher Than 60ng/ml:
- Heart failure
- Coronary artery disease
- Kidney failure
- Strokes in those who previously suffered a stroke
For most people, it is advisable to take vitamin D supplements. While there was not substantial evidence to conclude that high levels of vitamin D cause heart problems, those who are deficient are at a greater risk for cardiovascular disease and other serious health conditions.