For anyone longing for thicker, healthier hair, the journey can feel like a never-ending cycle of trying new products, switching up routines, and still facing frustration. But according to trichologist Dr Rekha Yadav, understanding the science behind hair growth and thickness is key to achieving real results. Let's break down what actually determines hair thickness, how to enhance it, and which treatments genuinely work. Understanding Hair Thickness & Growth What Determines Natural Hair Thickness?