Radix Rehmanniae Preparata in Wufa Pills should be Radix Rehmanniae Preparata! Take its effects of nourishing yin and blood, replenishing essence and filling marrow, and treat premature gray hair and so on.

Rehmannia glutinosa is sweet and slightly warm. Liver and kidney meridians entered.

It nourishes yin, nourishes blood, benefits essence and fills marrow. It can be used for treating yin deficiency of liver and kidney, soreness of waist and knees, hot flashes due to bone steaming, night sweats and nocturnal emission, thirst quenching due to internal heat, blood deficiency and sallow, palpitation, irregular menstruation, metrorrhagia and bleeding, dizziness, tinnitus and premature graying of hair and beard. Dosage 15-30g.

Radix Rehmanniae is sweet, bitter and cold. It can nourish yin, promote fluid production, clear heat and cool blood. It can be used for treating yin injury due to fever, red tongue, polydipsia, macula and rash, hematemesis, epistaxis, and sore throat. Internal heat due to yin deficiency, bone steaming and fatigue, internal heat to quench thirst, hematemesis, epistaxis, spots and rashes, etc.

It can be seen that black hair uses cultivated land instead of raw land.