Vitamin Deficiency testing is an important part of a complete health and wellness program. Research has documented the vital role that essential nutrients play in achieving and maintaining good health, and in preventing or treating many serious diseases. Some diseases that have been implicated with vitamin deficiencies are substance abuse, behavioral disorders, cancer, cardiovascular diseases, chronic fatigue, macular degeneration, diabetes, immune disorders, infertility, hormonal imbalances, weight gain, multiple sclerosis, stoke and osteoporosis.