Rehmannia Root refers to the processed rehmannia glutinosa libosch root. The processing method is to steam along with auxiliary materials of wine, Amomum, and orange peel, dry them in the sun, repeat the above-mentioned steps until they become totally black, oily, soft and sticky. Medicinally it is used sliced or charred. Other common names of this herb include Chinese Foxglove Root, dihuang, Rehmannia glutinosa steamed root, Rehmanniae radix, Digitalis glutinosa, Rhizoma rehmanniae, Rehmannia chinensis, cooked or cured rehmannia, and so on.

The rehmannia plant is a perennial herb, 10 to 40cm in height. The whole plant is covered with off-white villus and glandular hairs. Thick root is succulent, in shapes of bulk, cylinder, or spindle. Erect stems are single or with a few branches at the base. Basal leaves are in clumps. Blade is obovate-lanceolate, 3 to 10cm long, 1.5 to 4cm wide, and with obtuse apex, narrow base, wrinkled surface, and irregular jagged edges. Stem leaves are much smaller. The floral axis is erect, hairy, and in racemes in upper stem; bracts are leafy, developed or degraded; calyx is in bell-shaped, 5-lobed apex, and with triangular lobes, multicellular villous and white long-hair, and 10 veins; tubular corolla is wide, slightly curved, 3 to 4cm long, dark purple outside and mixed with yellow inside, and with clear purple stripes, and 5-lobed apex. Stamens are 4, didynamous, and anther with fork base; superior ovary is ovoid, 2-roomed but 1-roomed after flowering, 1 style, and enlarged stigma. Capsule is ovate or ovate and with acute apex, persistent style, and wrapped with the persistent calyx outside. Seeds are many. Flowering time is from April to May and fruiting time is from May to June.

Rehmannia Root

REHMANNIA CURED ROOT TUBER RECIPES ON HERBAL REMEDIS
The Chinese Materia Medica considers that it is sweet in flavor and warm in nature. And it covers meridians of liver and kidney. Essential functions include enriching the blood, moistening, invigorating the essence, and filling the marrow. Primary rehmannia root uses and indications are sallow complexion due to deficient blood, dizziness, palpitations, irregular menstruation, profuse uterine bleeding, Yin-deficiency in liver and kidney, hot flashes and night sweats, Nocturnal Emission, Impotence, infertility, soreness and weakness of waist and knees, Tinnitus and deafness, dim eyesight, premature graying, Diabetes, Constipation, and breathlessness caused by deficient kidney. And today it is also used for infertility, acne, thyroid, hair loss, and the like. Recommended rehmannia root dosage is from 10 to 30 grams in decoction. And you can choose other related products too, such as rehmannia root combo tea extract, tea, capsules, extract, powder, pills, and more.

1) Si Wu Tang from Tai Ping Hui Min He Ji Ju Fang (Formulas of the Peaceful Benevolent Dispensary). It is formulated with Dang Gui (Dong Quai), Bai Shao (White Peony Root), and Chuan Xiong (lovage) to treat blood-deficiency induced sallow complexion, dizziness, palpitations, insomnia, irregular menstruation, metrorrhagia and metrostaxis, and more.

2) Jiao Ai Tang from Jin Gui Yao Lue (Essential Prescriptions of the Golden Coffer). It works with E Jiao (Donkey-Hide Gelatin), Ai Ye (Mugwort Herb), etc. to cure blood deficiency, cold in blood, and cold pain in lower abdomen because of metrorrhagia and metrostaxis.

3) Liu Wei Di Huang Wan from Xiao Er Yao Zheng Zhi Jue (Key to the Therapeutics of Children’s Diseases). It joins with Shan Yao (Chinese Yam), Shan Zhu Yu (Cornelian Cherry), etc. to heal yin deficiency in liver and kidney, sore aching low back and knees, nocturnal emission, night sweating, tinnitus, deafness, and diabetes.