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.
Common Causes of Thinning Hair. 1  Thyroid Disease â Both high thyroid and low thyroid conditions can lead to falling hair. 2  Lupus â One of the earliest signs of this autoimmune disease is hair loss. 3  Anemia â Anemia is another reason hair falls out.  Diabetes â Like lupus, one of the earliest signs of this metabolic disorder is hair loss.