Sunlight is essential for life on our planet and has many benefits that may not be widely known. Vitamin D-3 is produced in the skin when exposed to UV radiation from the sun, a process which diminishes with age. Vitamin D-3 helps regulate calcium and phosphorus levels for robust bones, assists with muscle strength among older individuals, and supports the immune system. Cholecalciferol, or Vitamin D-3, is the optimal form of vitamin D and the one that is most efficiently used by the body.*