Zinc, an essential trace mineral, is required to produce an enzyme called carbonic anhydrase (CA) VI, critical to taste and smell, which is why loss of sense of smell is one of the classic signs of chronic zinc deficiency. read more
But for some people, including many elderly, the loss of a sense of smell may persist. In addition, anosmia can be a sign of a more serious medical condition. Any ongoing problems with smell should be checked out by a doctor. The Basics of Smell. A person's sense of smell is driven by certain processes. read more