Prairie Naturals - Canada's FAVOURITE Vitamin D brand! Vitamin D, also known as the "sunshine vitamin," is a vital nutrient that plays a crucial role in maintaining overall health and wellness. This fat-soluble vitamin is essential for strong bones, a healthy immune system, and proper cell growth and development. But with busy lifestyles and increased time spent indoors, many of us are not getting enough of this essential nutrient. Be sure that you're getting enough of the "sunshine vitamin" in your diet.