With recent studies suggesting a link between vitamin D deficiency and a host of conditions and ailments, it is becoming even clearer how crucial vitamin D is to overall health. According to data from the National Health and Nutrition Examination Surveys (NHANES), between 2001–2006, two-thirds of the population (roughly 67%) was vitamin D deficient. The human body needs vitamin D for a variety of reasons, but most importantly, vitamin D is necessary for the body to adequately absorb calcium and promote bone growth. While people can obtain a moderate amount of vitamin D through their diet by consuming certain foods, vitamin D derived from diet alone is not enough to sustain the human body. Too little vitamin D can quickly become problematic for babies and adults alike.