Dying hair red requires a mixture of animal fat and beechwood ashes[26] whilst dying hair gold required saffron.[27] Ovid gives plenty more examples for dyes, such as herbs and saffron.[28] To cure diseases such as hair loss, Pliny suggests the application of a sow's gall bladder, mixed with bull's urine, or of the ashes of an ass's genitals, or other mixtures such as the ashes of a deer's antlers mixed with wine.