Vitamin D is considered an essential vitamin, meaning our bodies need to take it on a regular bases. As a fat based vitamin, we store vitamin D in our adipose tissue until needed. Living above the equator, Canadians are at great risk of becoming Vitamin D deficient, especially in the winter. Deficiencies have been linked to numerous diseases including, Alzheimers, osteoporosis, diabetes and some cancers. Signs you may need to increase your vitamin D include; depression, bone and muscle aches, hair loss, slow healing and fatigue. If you suspect you are low, contact your health care professional as supplementation may be necessary.