Transitioning into the fall can be the hardest time of year for many people in the Northern West Coast. This is the time of year that mood often begins to dip and people suffer from SAD. In order to keep up your summer Vitamin D levels, start supplementing NOW with 3000-4000 IU of Vitamin D3 daily. Vitamin D3 is a fat soluble vitamin and is best absorbed in a natural oil base (like Extra Virgin Olive Oil). Vitamin D is not only good for mood, but very important for your immune system, brain health, bones, thyroid, and kidneys. It works in many places! So keeping up your levels is very important for your health.