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.
Early vitamin B12 cravings include decreased energy: weakness, fatigue, light-headedness, rapid heartbeat (tachycardia), panting; dermatological and dental indictions: pallor, easy bruising, sore tongue, bleeding gums; gastric disturbance: upset stomach, weight loss, diarrhea or constipation.