Great article; it shows that many people that you see that are prematurely grey must be deficient while others that are older and still have their natural hair color must be doing something right.
I find people that stick to more natural lifestyles and stay away from drugs that deplete our bodies of nutrients look younger, are more active and do not act or look their age.
Funny how scientists think they are so smart in discoveries that people knew about centuries ago; a bit too late on the scene don't you think? But don't tell them, their noses will be bent out of shape; natural is better than drugs - oh my!