Supplements 4 Fitness It become observed in 'Archives of General Psychiatry' that deficiencies result in melancholy as it affects the tiny parathyroid glands in the back of the thyroid and that they become overactive generating to plenty of a hormone that's regularly associated with melancholy. Other research at Emory University show a hyperlink with Parkinson's with sufferers having more than two times the bottom degrees of Vitamin D in their blood.