1. Rehmannia glutinosa has many medicinal effects, and it has many benefits for people's health, but it should not be taken in excess. Generally speaking, it is enough to take 1 to 3 grams of Rehmannia glutinosa every time and soak it in water for two or three times. Do not overdo it or take it every day.

2. Long-term use may hinder the transport and transformation function of the spleen and stomach. If it is used as a treatment for a certain disease, it should be carried out under the guidance of a doctor.