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: Muscle weakness; Joint aches and discomfort; High blood pressure; Inability to concentrate or focus; Urinary incontinence, bladder issues; Constipation; Headaches; Cold/flu, immune system decline; Mood disorders; More serious diseases linked to vitamin D deficiency include: Osteoporosis; Heart disease; Autoimmune diseases; Periodontal disease