As a hair care expert with over a decade of experience in the industry, I've often been asked about the texture and thickness of grey hair. It's a common misconception that grey hair is thicker or coarser than hair with pigment. In reality, the process of greying involves the hair follicle producing less melanin, which is the pigment responsible for hair color. As a result, the hair becomes less pigmented and appears grey or white.

However, the actual thickness or diameter of the hair strand does not change significantly with the loss of pigment. What can change is the perception of thickness due to the hair becoming more brittle and possibly breaking off at a higher rate, which can make the remaining hair appear thicker. Additionally, the texture of grey hair can be affected by the natural aging process of the hair, which can lead to a drier and more porous hair shaft, but this is not directly related to the hair being grey.

In conclusion, while grey hair may sometimes seem thicker due to breakage and the hair's texture, the actual thickness of the hair strand does not inherently increase with greying.

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Gray hair grows when hydrogen peroxide builds up in your hair follicle. "This causes hair to bleach itself from the inside out," says Debra Jaliman, MD, a dermatologist in New York and spokesperson for the American Academy of Dermatology. Gray hairs are thicker and wirier, so your hair gets coarser as they multiply.read more >>