Helps Build Strong Bones - Research Indicates That Vitamin D Plays A Significant Role In Helping To Develop Bone Strength And Density.* | Supports Heart Health – Vitamin D3 Regulates Healthy Cellular Growth, Which Has Been Shown To Support Heart Health.* | Exceptional Overall Health Supplement – ​​Natrol Vitamin D3 Is A Vital Daily Supplement To Help Improve Overall Health.* | Sunshine Vitamin - Vitamin D Has The Nickname The “Sunshine Vitamin” Because Our Skin Manufactures Vitamin D When Exposed To Sunlight. Vitamin D Is Needed In Almost Every Cell Of The Body.