Many nutrients are vital to the health of the human body, and vitamin D is no exception. It helps the body absorb calcium, which is essential for ensuring bones grow and stay strong. However, vitamin D deficiency has been linked to a host of other diseases. This list includes depression, heart disease and even some forms of cancer. If you don’t get enough sun, like many swing shift workers, or lack an adequate amount of the nutrient in your diet, you may have a deficiency. Here are ten important signs that you are deficient in this essential nutrient.

1. Inexplicable Aches and Pains

Lethargy and unexplainable generalized pains are symptoms of some worrisome diseases like fibromyalgia and arthritis. But these symptoms might be telling you that you have a vitamin D deficiency. Without enough vitamin D to absorb adequate amounts of calcium, the bones can lose strength resulting in a deep ache or pain. This may be even more noticeable in the winter when sun exposure decreases for everyone. There are more incidents of broken bones in the winter time. Those with higher levels of vitamin D show increased muscle function in their extremities compared to those with less vitamin D in their blood.