It was a typical Saturday afternoon, and a group of friends—Mia, Lily, Jake, and Sophia—were catching up at their favorite coffee shop. The conversation started with the usual chit-chat but quickly took an interesting turn when Mia, who had recently noticed a few grey strands in her hair, sighed and asked, “Guys, what causes grey hair? I feel like I’m way too young for this!” The Science Behind Grey Hair Jake, always the science geek, jumped in. “Well, Mia, it all comes down to melanin. That’s the pigment responsible for the color of your hair. As we age, the cells that produce melanin—called melanocytes—start to wear out. So, less melanin means less color, and that’s when you start seeing grey or white hairs.” Sophia nodded in agreement. “And it’s not just about aging. Sometimes, grey hair can pop up due...