High Vitamin D: Calcification of soft tissue, bonepain, osteoporosis, high blood pressure, weight loss, loss of appetite, nausea, abdominal pain, seizures, retarded growth, skin erruptions, kidney damage, headaches, constipation or diarrhea, atrial fibrillation, allergies, inflammation of mucus membranes, tetany of muscles. May worsen symptoms of autoimmune diseases, conflicting research of higher risk for several cancers... Full Text