Recently a drug introduced by italy that rectify white hair to black hair.?

I want know /

How this subject is true ?

Recently a drug introduced by italy that rectify white hair to black hair.?

Doubtful.

White hair is white because of the lack of colour, or melanin being pushed through the roots of your scalp.

That is why people dye white/grey hair, because it deposits the melanin or colour back in.