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Why are grey hairs so brittle? Unlocking the science behind texture change

According to dermatologists at Mount Sinai Hospital, hair first starts to turn grey between the ages of 34 and 44, and this process brings a significant change in hair texture. Many people find themselves wondering, "Why are grey hairs so brittle?" The simple answer is a combination of decreased melanin and reduced sebum production that leaves strands more vulnerable to damage.