What is Sheng Jiang? Are Gan Jiang, Pao Jiang, Wei Jiang and Jiang Pi the same?
Official Sheng Jiang (生姜) is the fresh rhizome of Zingiber officinale. The pharmacopoeial name is Zingiberis Rhizoma Recens. It is both food and medicine. Gan Jiang is the dried rhizome: acrid-hot, warms the middle to disperse cold, restores Yang and unblocks the vessels, and warms the Lung to transform thin mucus. Pao Jiang is sand-scorched dried ginger: warms the channels to stop bleed and warms the middle to stop pain. Wei Jiang is milder, warming the middle to stop vomit. Jiang Pi is cool and moves water to disperse swelling. Same plant, different freshness and processing—not an equal swap. Write Sheng Jiang; do not dispense Gan Jiang or Pao Jiang to release the exterior and stop vomit.
What are the TCM properties and traditional uses of Sheng Jiang?
According to the Chinese Pharmacopoeia, Sheng Jiang is acrid and slightly warm, enters the Lung, Spleen and Stomach channels, and acts to release the exterior and disperse cold, warm the middle to stop vomit, transform phlegm to stop cough, and resolve fish-and-crab toxin. It is used for wind-cold common cold, Stomach-cold vomiting, and cold-phlegm cough. Acrid and slightly warm, it mainly disperses—suited to wind-cold, Stomach cold and cold phlegm, not to Yin-vacuity interior heat, Lung heat, Stomach heat or reckless Blood heat.
How do you choose Sheng Jiang, Gan Jiang and Pao Jiang? Should it be sliced?
Wind-cold exterior patterns, Stomach-cold vomiting and fish-crab toxin use Sheng Jiang, cut thick at the time of use or pounded for juice. Interior-cold abdominal pain and restoring Yang use Gan Jiang. Vacuity-cold bleeding uses Pao Jiang. “Three slices of Sheng Jiang” in a formula is about 3–10 g. Do not mix fresh and dried.
What is the usual dosage? Can it be drunk daily as a cold-dispelling ginger tea?
The pharmacopoeial decoction dose is 3–10 g. A kitchen portion is not the same as a decoction. It is not a four-season “ginger cold-dispelling tea.” Yin-vacuity interior heat, hemorrhoids and red eyes only burn more when warmed. Wind-cold and Stomach cold need a practitioner to name fresh or dried and a course.
What are the contraindications? Can it be used in pregnancy?
Forbid large long courses in Yin-vacuity interior heat, Lung-heat cough, Stomach-heat vomiting, hemorrhoids and eye heat. Acrid-warm assists fire. Culinary amounts in pregnancy are common; high medicinal doses need assessment. Stop if dry mouth, sore throat or bloody stool appear.
Can Sheng Jiang stop vomit, induce sweat and transform phlegm?
It can help wind-cold and Stomach cold. Wind-cold exterior vacuity joins Cinnamon Twig, white peony, jujube and licorice in Gui Zhi Tang. Shao-yang joins Bupleurum, Scutellaria, Pinellia, ginseng, jujube and licorice in Xiao Chai Hu Tang. Stomach-cold vomiting joins Pinellia in Xiao Ban Xia Tang. It disperses exterior cold and stops vomit—not a specific for every cold, every vomit or every cough. High fever with convulsions and violent hematemesis are emergencies.
Can Sheng Jiang be drunk daily as an anti-inflammatory, slimming or womb-warming tea?
Wind-cold and Stomach cold may enter a short formula or the diet; Yin-vacuity fire only grows drier. “Ginger anti-inflames and warms the womb” does not replace gastroenterology and gynecology. Releasing the exterior and warming the middle should name Sheng Jiang (not Gan Jiang or Pao Jiang) and a 3–10 g dose.
How do you choose among Sheng Jiang, Gan Jiang, Pao Jiang, Zi Su and Ban Xia?
Fresh ginger is acrid and slightly warm: releases the exterior, disperses cold, warms the middle to stop vomit, transforms phlegm to stop cough and resolves fish-crab toxin—mainly dispersing. Dried ginger is acrid-hot: warms the middle, restores Yang and unblocks the vessels, warms the Lung to transform thin mucus—mainly holding the interior. Blast-fried ginger is acrid-hot: warms the channels to stop bleed and warms the middle to stop pain—enters the Blood. Perilla is acrid-warm: releases the exterior, disperses cold, moves Qi, harmonizes the Stomach and resolves fish-crab toxin, also calming the fetus. Pinellia is acrid-warm: dries damp, transforms phlegm, directs rebellion downward to stop vomit and disperses glomus—must be processed. Exterior-cold vomiting favors Sheng Jiang and Zi Su; interior cold favors Gan Jiang; vacuity-cold bleeding favors Pao Jiang; phlegm-vomit favors processed Ban Xia with Sheng Jiang. They may be paired; all are wrong as pure acrid-warmth in Yin-vacuity interior heat, and fresh, dried and blast-fried must not be swapped.
Which herbs is Sheng Jiang combined with? What are the representative formulas?
Wind-cold exterior vacuity joins Cinnamon Twig, white peony, honey-fried licorice and jujube in Gui Zhi Tang. Shao-yang joins Bupleurum, Scutellaria, Pinellia, ginseng, honey-fried licorice and jujube in Xiao Chai Hu Tang. Stomach-cold vomiting joins Pinellia in Xiao Ban Xia Tang. Write Sheng Jiang; do not dispense Gan Jiang or Pao Jiang.
How do you choose and store Sheng Jiang?
Choose plump fresh rhizomes, thin skin, a yellow-white fracture, aromatic and acrid-pungent. Shriveled, moldy, rotten, frost-bitten and blackened lots are discarded. Keep cool and slightly moist or bury in damp sand against frost; do not store until dry and withered. Buy fresh Sheng Jiang; do not replace releasing the exterior and stopping vomit with an equal weight of Gan Jiang or Pao Jiang.