Grey Hair: Clinical Investigation Into Changes in Hair Fibres With Loss of Pigmentation in a Photoprotected Population

The study investigated changes in hair fibers with loss of pigmentation in a photoprotected population, specifically Old Order Mennonites who avoid chemical treatments and limit sun exposure. The research focused on comparing pigmented and unpigmented hair fibers in terms of elemental composition, mechanical properties, and moisture uptake. While few global differences were found between pigmented and unpigmented hair across the population, individual differences were noted, particularly in bulk properties rather than surface properties. These findings supported the perception that grey hair is wilder, drier, and less manageable, aligning with consumer complaints about grey hair.