1. Rehmannia chinensis root extract has the function of treating lung dryness syndrome with cough of epistaxis;
2. Rehmannia extract is beneficial to treat syndrome of yin deficiency and fire-hyperactivity with hectic fever;
3. Rehmannia glutinosa root extract has the function of treating of fatigue eat less, throat thirsty, and rheumatism lumbar and leg pain;
4. Rehmannia root powder has the function of treating of limb heartless joint flexion and extension negative, frostbite and other symptoms.