The human body contains many natural polymers, such as proteins and nucleic acids. Cellulose, another natural polymer, is the main structural component of plants. Most natural polymers are condensation polymers, and in their formation from monomers water is a by-product.
Alopecia areata is one type of hair loss that typically causes patches of baldness. In some cases, total baldness develops. In many cases, the hair re-grows, typically after several months. In some cases, the hair loss is permanent.
Low intake of zinc and iron are the most common nutritional causes of hair loss. Low intake of zinc and iron are the most common nutritional causes of hair loss.] Physical and emotional stress can cause hair loss. Surgery, high fevers, and blood loss can cause enough stress to cause excessive shedding.