Researchers also found an increase in cardiovascular risk with each level of vitamin D deficiency. "We found that people with low vitamin D levels had a higher rate of cardiovascular events over the five-year follow-up period ... These results are intriguing and suggestive but need to be followed up with further study." Study participants had no prior cardiovascular disease and were tested for vitamin D status and then followed for an average of 5.4 years. Full Article at Consumer Affairs