Psoralea Fruit bǔ gǔ zhī · 补骨脂

Safety. This is one of the materia medica where modern safety reports go beyond what the tradition recorded: liver injury has been reported, and the psoralens — furanocoumarins in the seed — make skin photosensitive, which is why psoralen combined with ultraviolet light is a supervised medical procedure rather than a home activity. Because of that photosensitivity, do not combine it with phototherapy or with other photosensitising medication, and keep treated skin out of the sun. Avoided in pregnancy. Not for self-directed use.