Paste that removes grey hair

Equal parts of mango-kernel powder and iron powder, with triphala powder and nilanjana powder each equal to these, are rubbed with six parts of triphala decoction and two of sesame oil, kept in an iron vessel buried in grain for four months and, after worship, applied to the hair and washed off with triphala decoction; white hair is said to turn black at once. The commentary adds that the same preparation made with pure kanta iron bhasma is to be eaten, with good conduct. A footnote says to apply it at night and wash it off in the morning.