What you should hear is a Chinese medicine to dye hair. Not a real pomegranate.

The prescription is:

(The method recorded in the ancient book Shenfang. )

Pomegranate dyeing: acid pomegranate and gallnut are ground into coarse powder, and put into an iron vessel and soaked in water. After a week, take the juice and apply it to your hair, which has the effect of blackening your hair. There is also a pomegranate peel prescription: gallnut, persimmon leaf, Gan Song bletilla powder and indigo naturalis, which are decocted and concentrated in water, and the residue is removed to store juice, and the hair is painted once every other day with a brush dipped in medicinal juice. You can dye white hair into black hair.