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.
Symptoms of Vitamin D Deficiency. People with vitamin D deficiency may experience bone pain and muscle weakness although the symptoms may be very mild at first. Children who have rickets suffer from soft bones and skeletal deformities. Deficiency in adults will cause osteomalacia, which is a condition that makes your bones weak.