Zingiberaceae

Zingiber officinale

Ginger

Trial support Caution

Part used: rhizome
Native range: Probably island Southeast Asia; a cultigen, not certainly known in the wild
Morphology: A perennial to a metre with reed-like leafy stems arising from a branching aromatic rhizome. Rarely flowers in cultivation and is propagated by dividing the rhizome.

What is in it

gingerols 6-gingerol

shogaols 6-shogaol

volatile oil zingiberene

Evidence

Reasonable evidence for nausea and vomiting in pregnancy, where it appears in clinical guidance, and for post-operative nausea. Evidence in motion sickness and chemotherapy-induced nausea is weaker and mixed. Osteoarthritis pain shows small effects.

Safety

Well tolerated at culinary and modest medicinal amounts. Heartburn is the commonest complaint. Antiplatelet activity is real at higher doses, which matters around surgery and for anyone anticoagulated.

Interactions: Additive bleeding risk with anticoagulants and antiplatelets; Theoretical effect on blood glucose in diabetes

Regulatory: Permitted as a food and as a listed medicine ingredient.

How the traditions classify it

Galenic Classed as hot in the third degree and dry in the second.

Chinese Fresh ginger, sheng jiang, is warm and pungent, for the exterior and for nausea; dried ginger, gan jiang, is hot and used differently. The tradition treats them as two distinct medicines, which is chemically justified — drying converts gingerols to shogaols.

Ayurvedic Pungent in taste, heating in potency, sweet after digestion. Called vishwabhesaj, the universal medicine.

Three systems, rating the same plant. Where they disagree, none of them is correcting the others — they are separate frameworks that arrived at their categories independently.

Historical use

Traded across Asia and into the Mediterranean for well over two thousand years, and used in every major tradition it reached for digestion, nausea and cold conditions.

Recorded as history and attributed where possible. Long use establishes that a plant was widely used, not that it worked, and not that it was safe.

Worth knowing

Ginger is the best worked example of the Chinese tradition making a chemical distinction that turns out to be correct.

Sheng jiang and gan jiang — fresh and dried — are treated as two separate medicines with different natures and different uses. Modern analysis says the same thing: drying dehydrates the gingerols into shogaols, which are more pungent and pharmacologically different. A framework with no access to chemistry noticed the difference and encoded it.

It is also one of the few herbs a clinician will actively suggest, for nausea in pregnancy, where the safety record is long and the alternatives are limited.

Nomenclature verified against GBIF backbone taxonomy.