Vitamin D is crucial for many different processes in the body. This vitamin functions more like a hormone than a vitamin. You get vitamin D from the sun. UV rays react with the cholesterol in your skin to produce vitamin D. Most people, in particular those who live in a more northern climate or who don’t get regular sun exposure, are deficient in vitamin D.
It’s a good idea to get your levels checked with your medical doctor or naturopath. A simple test can tell you if you need supplementation. You should regularly measure your vitamin D levels to make sure you’re maintaining optimal levels; supplementation should be tailored to keep you in the optimal range.