Yes, white (nonpigmented) hair can be thicker than pigmented hair like black hair.
While not always universally true for every individual strand on every head, research suggests a tendency for white hair to exhibit increased thickness. This observation stems from the processes occurring within the hair follicle as pigmentation diminishes with age.
Here's a breakdown:
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Loss of Pigmentation & Hair Structure: As melanocytes (the cells that produce pigment) become less active, the hair's structure can change. The absence of melanin can alter protein production, sometimes leading to a slightly increased diameter.
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Growth Rate: Studies suggest that the growth rate of white hair can be higher than that of pigmented hair. A higher growth rate, coupled with structural changes, can contribute to the perception (and sometimes the reality) of thicker hair.
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Perception vs. Reality: Sometimes, the difference in texture between white and pigmented hair can feel like thickness. White hair can be coarser and wirier due to changes in the cuticle (the outer layer of the hair shaft), which may be perceived as increased thickness.
Important Considerations:
- Individual Variation: Hair thickness is highly variable. Genetics, overall health, and hair care practices play significant roles. Not everyone experiences increased thickness in their white hair.
- Hair Density: It's crucial to differentiate between the thickness of individual strands and the overall density of hair on the scalp. While a single white hair strand might be thicker, the number of hairs per square inch could decrease with age.
- Hair Diameter Measurement: Hair diameter can vary along the length of the shaft, so precise measurements are necessary to make accurate comparisons.
In summary, while white hair can be thicker than pigmented hair, this is not a universal rule and depends on various factors. The perception of thickness may also arise from changes in hair texture.
