There are many causes of depression, some resulting from abnormal brain chemistry, while others are associated with low blood pressure, low thyroid, or low levels of various essential nutrients such as lithium, calcium, magnesium, copper, sodium, protein, Vitamin B1, B6, B12, manganese, and others. Many of these nutrients are well documented in affecting mood, but Dr. Ronald Roth had not previously come across any reference to tin until starting to do research on it, and after it helped some patients with depression where any other drug, nutrient, or intervention had failed... Full Text