Which hair condition is known for its brittleness?

The condition known for causing brittleness in hair is Trichorrhexis Nodosa. This hair disorder is characterized by the presence of nodes or bulges along the hair shaft, which can make the hair weaker and more susceptible to breakage. As a result, individuals with Trichorrhexis Nodosa often experience hair that is frayed at the ends or breaks easily, leading to an overall appearance of damaged hair.

In contrast, Canities refers to the graying of hair, which is a natural part of the aging process and does not directly relate to hair brittleness. Alopecia Areata is an autoimmune condition that causes sudden hair loss in patches, and while it may affect the overall health of hair, it is not specifically associated with brittleness. Hypertrichosis involves excessive hair growth and does not pertain to the quality or structural integrity of the hair shafts.

Thus, Trichorrhexis Nodosa is specifically noted for its impact on the hair's texture, making it brittle and prone to damage.