I just completed an article soon to be published in a popular nutrition journal which sheds some light on the question posed above. The answer might seem yes, of course, that goes without saying. However, in reality, it is not as simple as some might think.
Vitamin D is a versatile nutrient, and like all vitamins, we can't live without out it. But unlike all of the other vitamins, it does not have to come from our food, we can get all we require from the sun. But since most of us don't spend much time in the sun, or use sunscreen when we are outside, dietary sources are important.
Many of my patients are already taking vitamin D when at our first meeting. Some have had blood testing done to check their vitamin D levels. While these are generally good practices, I take a slightly different approach to vitamin D supplementation - I make sure that vitamin D is not the only vitamin that needs to be supplemented. Vitamin D works in concert with vitamins A and K, vitamins that many women also don't get enough of for a number of reasons.
What can happen if you take vitamin D on its own? Nothing terrible in most cases, but if too much vitamin D is taken for too long a period of time, there is a potential for some calcium deposits to occur in soft tissues like the kidneys.
As soon as this article is published, I am going to post the link for those who want a more complete understanding of what needs to be considered when taking vitamin D.