Serpent (symbolism) The serpent, or snake, is one of the oldest and most widespread mythological symbols. The word is derived from Latin serpens, a crawling animal or snake. Snakes have been associated with some of the oldest rituals known to humankind and represent dual expression of good and evil.
1 Osteoporosis, a condition characterized by reduced bone mineral density and increased bone fragility.  Rickets, a childhood disease characterized by impeded growth and deformity of the long bones. The earliest sign of subclinical vitamin D deficiency is craniotabes, abnormal softening or thinning of the skull.
1 Vitamin D deficiency results in chronic fatigue and multi-system symptoms Author: Dr. med. Anna Dorothea Hoeck, MD, Mariawaldstr. 7, 50935 Cologne, Germany. E-Mail: ad.hoeck@t-online.de No potential conflicts of interest exist in this paper.