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.
An early sign of vitamin B3 deficiency is a lack of appetite. Vitamin B3 deficiency may be mild or severe. A mild deficiency of vitamin B3 causes symptoms such as a coated tongue, mouth sores, low blood sugar, dizziness, and chronic headaches.Other possible symptoms of mild vitamin B3 deficiency are skin lesions, anemia, and diarrhea. prolonged and severe niacin deficiency may cause depression and neurasthenia (weakening of muscles). Vitamin B3 deficiency can be overcome by including vitamin-B3-rich foods in the diet including milk, egg, fish, tuna, beef, chicken; dates, avocados, tomatoes, carrots, leaf vegetables; whole-grain products and nuts.