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.
Specific symptoms related to vitamin D deficiency include: 1  Muscle weakness. 2  Joint aches and discomfort. 3  High blood pressure. 4  Inability to concentrate or focus. 5  Urinary incontinence, bladder issues. 6  Constipation. 7  Headaches. 8  Cold/flu, immune system decline. 9  Mood disorders.