Rehmannia glutinosa: cold in nature, with the functions of cooling serum heat, nourishing yin and tonifying kidney, promoting fluid production to quench thirst, and is often used to treat diseases such as heat entering blood, bone-steaming fever, dry throat and pain, and blood in phlegm. Liuwei Dihuang Pill, which is mainly made from Radix Rehmanniae, is a famous prescription for tonifying kidney through the ages, and is also commonly used in the treatment of chronic nephritis, hypertension, neurasthenia, tuberculosis and other diseases.

Rehmannia glutinosa: It is warm in nature, and its function has also changed, so it is an essential medicine for enriching blood. Compatibility of Angelica sinensis, Radix Paeoniae Alba and Rhizoma Chuanxiong is the famous "Siwu Decoction", which is often used to treat blood deficiency. Radix Rehmanniae Preparata with Radix Paeoniae Alba can nourish liver, Semen Platycladi can nourish heart, Arillus Longan can nourish spleen, and Herba Ephedrae can promote blood circulation. However, Rehmannia glutinosa nourishes the spleen, which hinders digestion. Therefore, people with spleen deficiency should eat less, and those with a full stomach of loose stool should not take it.

So there are still some differences between Radix Rehmanniae and Radix Rehmanniae, both in appearance and efficacy, so you must pay more attention when buying.