Natural vitamin D3 is an essential vitamin for good health. Known as the sunshine vitamin vitamin D is produced naturally by your skin when exposed to the sun s ultraviolet light. Unfortunately in today s world of working and living indoors most people don t get outside enough to let their bodies produce adequate stores of vitamin D. A single drop of Carlson Super Daily D3 delivers a full 50 mcg (2 000 IU) of vitamin D equal to 250% of your daily value. This liquid supplement is gluten free preservative free and soy free.