The value of the Rehmannia herb has been in the consciousness of Chinese traditional medicine since antiquity. It is considered as one of the fundamental herbs and is popularly known as a longevity and restorative tonic.
Rehmannia forms a key role in traditional formulas to combat the so-called yin deficiency, especially of the liver and kidneys. In Chinese traditional medicine, yin is said to enrich the body’s organs and acts as a facilitator of bodily functions. When the yin is deficient, chronic dryness and inflammation often occurs.
Rehmannia is an erect perennial herb native to China and Inner Mongolia that grows up to a height of 60 centimeters. Also known by its scientific name of rehmania glutinosa, it possesses a basal rosette of dentate petiolate leaves and has purplish-red colored flowers. The roots are brownish-yellow in color and are slightly sweet to the taste. The rehmannia is typically grown as an ornamental plant in Europe and the Americas.
The active constituents of rehmannia are the following: iridoid glycosides, rehmannin, mannitol, beta-sitosterol, glucosamine, arginine, aspartic acid, manganese, magnesium, lysine, potassium, sucrose, sterols and many others. Rehmannia is also rich in vitamin A, vitamin B, vitamin C and vitamin D.
The roots of the rehmannia plant contain high concentrations of the above constituencies and are often traditionally prepared with an infusion of yellow wine and black beans. To make rehmannia tea, place a handful of the dried rehmannia roots in a cup of boiling water. Let the mix cool for about 10 to 15 minutes. Rehmannia tea can be combined with ginger or cardamom to prevent indigestion.
The following are some beneficial effects of this tea:
- Thought to replenish energy and vitality.
- Said to help in tonifying the liver and the kidney.
- Looks to help in the treatment of anemia.
- Could assist in the treatment of heart weakness.
- May aid in the treatment of vertigo and pallor.
- May help against infections.
- Could be helpful against constipation.
- Believed to fight against hypoglycemia.