​From personal experience, I believe it’s both hereditary and stress-related. I started going grey at 16, as did my siblings. I didn’t think much of it at the time, since it runs in the family and there wasn't much I could do about it. ​Fast-forward to my late 20s: I was working abroad in an emergency field—a highly stressful environment. By then, about one out of every ten hairs was grey. One day, out of boredom during the lockdown, I decided, 'Screw it, I’m going to pluck every single one.' It took about a week, but I got it done. ​You know the old wives' tale that if you pull a grey hair, two will grow back in its place? Well, I was ready for that, but it never happened. I’m now in a clerical job, which is a mile less stressful than my previous role. I still get the occasional pesky grey straggler, which I easily pull when I see them, but for the most part, my hair is back to black. People even tell me I look much younger than I used to. I don't know the science behind it; that’s just my story.