Over the years, I've talked a lot about vitamin D and cancer. In fact, recent estimates suggest that vitamin D protects against 22 different types of malignancies including breast, colon and prostate cancer. Well, it may be time to add another type of cancer to the list. Two months ago, researchers found that vitamin D also protects you against bladder cancer.

For the vitamin D and cancer study, published in the journal Cancer Research, scientists recruited 500 men to take part in the study. Each of them were cancer-free at the beginning of the study. Researchers took blood samples of the men between 1985 and 1988 to check for levels of 25-hydroxyvitamin D. This is what vitamin D converts into in the body. Then, they compared men diagnosed with bladder cancer against men who did not have the disease.

They found that men with less than 25 nanomoles per liter of 25-hydroxyvitamin D were 73 percent more likely to develop bladder cancer compared to men with at least 50 nanomoles per liter.

And though the vitamin D and cancer study was conducted with male smokers, I'm certain they will get the same results with nonsmokers and women. You see, scientists believe vitamin D helps to flush toxins out of your bladder. It also promotes the healthy turnover of cells in the bladder.

So even if you're a woman or a nonsmoker, continue taking your vitamin D every day. Go for up to 5,000 IU per day, especially if you live in the northern part of the country.