Handy pocket guide. Ever wonder what vitamin or mineral may effect a given symptom? All prior known reference material organizes by vitamin or mineral. One is required to read them all to find a given symptom. Now you can read the symptom first! This information has been condensed from many issues of Prevention Magazine. According to Prevention Magazine this information has come from studies done by competent persons and organizations. Some relationship has been established in most instances linking these symptoms with a lack of the corresponding vitamins and minerals. In most cases, symptoms have improved or entirely eliminated when some form of vitamin or mineral therapy was administered. This product is presented for informational purposes only.