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.
Low vitamin D levels can be found in people of all age group including small babies and the elderly. Some of the most common symptoms of low vitamin D are fatigue, muscle pain, joint pain, weight gain, headache, constipation or diarrhea, high blood pressure, etc. There are several factors that can contribute to this problem. Following are some of the prevalent causes of low vitamin D in the human body. â Lack of Exposure to Sunlight. The inner layer of the skin produces vitamin D using sunlight. If one does not have enough sun exposure, he or she may develop vitamin D deficiency.