Vitamin D Is Important For Optimal Cardiovascular, Neuromuscular, Bone And Immune Health. It Acts As A Hormone, A Chemical Messenger That Has Wide-Ranging Effects In The Human Body. Eating An Adequate Amount Of Calcium And Vitamin D Throughout Life, As Part Of A Balanced Diet, May Be Considered To Reduce The Risk Of Osteoporosis. Supplementing With Vitamin D May Be Necessary To Meet Daily Needs, Since Getting Adequate Vitamin D From Natural Food Sources And Exposure To Sunlight Alone Can Be Difficult. Research Indicates That Vitamin D3 Cholecalciferol Is Approximately 87 Persent Stronger Than Vitamin D2 To Raise And Maintain Vitamin D Levels In The Blood.