31 Jan 2023 --- Japanese scientists have discovered that ultraviolet (UV) rays are closely related to frizzy hair that occurs on the outer layer of the head, which disrupts the alignment of hair bundles and causes uneven appearance. “Uneven frizzy shape of every single hair fiber is considered to be due to the innate and/or acquired accumulation of damage caused by hair dying, heat setting and the like. This has been difficult to fully be resolved by daily hair care,” state the researchers.
