Understanding the Science Behind Hair Growth Hair is more than just a feature of beauty ; it’s a living extension of your body that reflects health, genetics, and lifestyle. To truly appreciate how hair grows, we need to look at the fascinating science happening beneath the scalp. The Structure of Hair Each strand of hair begins in a tiny pocket in the skin called a hair follicle. At the base of the follicle lies the hair bulb, where living cells multiply and push upward, hardening and forming the hair shaft. Blood vessels around the follicle deliver oxygen and nutrients, fueling growth. Hair itself is made mostly of keratin, a protein also found in nails and skin. Though the visible part of hair is “dead” tissue, its growth depends on the health of the follicle below the surface. The Hair Growth Cycle Hair doesn’t grow continuously; it follows a natural cycle: Anagen Phase (Growth Phase): Lasts 2–7 years. Hair actively grows about half an inch per month. The length of this phase det...