“Shaving makes hair grow back thicker”

It is a common and persistent belief that shaving makes hair grow back thicker, darker, or coarser. This idea has likely been passed down through generations, fueled by the immediate visual and tactile changes people notice after a fresh shave. Many individuals feel that their stubble is more prominent and rougher to the touch than the hair that was there before, leading to the conclusion that the act of shaving somehow strengthens the hair itself.

However, the science of hair growth tells a different story. Hair is a dead protein filament that grows from a follicle beneath the skin's surface. Shaving merely cuts the hair shaft at its widest part, the point where it emerges from the skin. It has absolutely no impact on the hair follicle itself, which is the living part responsible for producing hair. Therefore, the razor cannot alter the genetic programming that determines your hair's actual thickness, color, or the rate at which it grows.

The perception of thicker or darker hair after shaving is an illusion created by how the hair is cut and its subsequent appearance. When hair grows naturally, the tip is tapered and often softened by wear and tear, as well as exposure to sunlight which can lighten it. Shaving, however, leaves a blunt edge. As this blunt-tipped hair begins to grow out, it feels coarse and appears more noticeable because it lacks the fine, soft taper of untouched hair. Additionally, the new growth is "fresh" and hasn't been exposed to environmental factors that might lighten or damage older hair, making it seem darker and more robust.