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.
Signs and symptoms of vitamin deficiency anemia include: Fatigue; Shortness of breath; Dizziness; Pale or yellowish skin; Irregular heartbeats; Weight loss; Numbness or tingling in your hands and feet; Muscle weakness; Personality changes; Unsteady movements; Mental confusion or forgetfulness; Vitamin deficiencies usually develop slowly over several months to years.