Am I malnourished or underinformed?

I'm 5' 1'' or 2'' or somewhere in between & I think I'm about 110 lbs. But I read somewhere that "Malnutrition is also known to cause hair to become lighter, thinner, and more brittle. Dark hair may turn reddish or blondish due to the decreased production of melanin." This describes my hair color, although my hair occasionally falls out. I'm a vegetarian & maybe I don't eat too well but as my weight indicates, I'm not anorexic nor am I bulimic. Besides, I have a blue & green alleles so it's possible that I might be of a European descent but I'm not sure. All I know is my hair was never black but not reddish, especially in the sunlight. In a bright light (indoors), it's light brown. So I don't know what to think cuz my family never discusses my genetic background.