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.
In addition, hypertension can result.Symptoms of vitamin D toxicity may include the following: 1  Dehydration. 2  Vomiting. 3  Decreased appetite. 4  Irritability. 5  Constipation. 6  Fatigue. 7  Muscle weakness. 8  Metastatic calcification of the soft tissues.