It certainly can be stress (but not necessarily)- as can hair falling out much more than usual - I was told that this will often happen some weeks after the stress period or incident. I am not sure but I also think hormone changes can trigger hair changes - at least that is what I reckon with me at the moment as my hair is starting to grow back in the bald areas!
There is no certain age. Lack of Vitamin B causes gray hair. Stress burns up Vitamin B. In my family gray hair does not affect us until the 70s. Sometimes gray hair is inherited. My Greek brother-in-law's brother was gray in his twenties.
Dying your hair will also strip your color and bring gray hair about much faster.
Vitamin B and the Lack of dying your hair is the secret to having your natural color longer.
I frost my hair (Blond Highlights) but have no gray. None of my sisters who are older than me have gray hair.
Awwwww. It's not so bad. I got my first gray hair in my twenties. Now at 51 I do nothing to cover it. I've had lots of compliments on my hair for letting it go natural. It looks professionally done. Let nature take it's course and you may be surprised. I was.
Franya, my gray hairs curl too while the rest is totally straight. Don't know why. Mine turned gray underneath first, all the top was dark brown but when I pull my hair back, it's all gray. (Except for one stripe down one side)
Sandy, when people told me I'd look twenty years younger without the gray hair, it made no sense to me. Why would I want to look too young to be my own kids' mother?! I did start dying it when my youngest was afraid that gray hair meant I was really old and might die soon
Good Lord, now is the time to act!!!! Get some cool highlights to disguise those little monsters as long as you can. that's how I do it. Everyone goes "is that your natural hair color"...well, normally guys do....and I go "yes, my natural hair color is MULTI, duma$$".
Ok...so I'm going to tell you a secret..lol Vitamin B12! I started getting gray hair seriously before I was 30, a few here and there, a few stragglers turned into a few more, gradually at my roots around my face...ugh. I spend years literally dying my hair like every other month so they wouldn't show up in my black hair. So, I read that there all these studies that Vitamin B12 can not only prevent gray hair but it can literally REVERSE it sooooo I mean, I'm a sucker and I'll try anything once. I swear 5 months later I have not one gray hair on my head. My mom even tried searching to find one the other day and they are all gone. I'm writing a hub on it right now. It might be worth the couple dollars you spend on a bottle of vitamins to give it a try.
I deliberately didn't post this in the Religion forum:-)(although spiritual and anti-spiritual, serious and flip answers of all shapes/sizes welcome).Mostly just reaching out to see who might have personal experiences...