The root of ginger, or also known as the rhizome, contains many pungent phytochemicals and active ingredients.
The essential oil of ginger contains different compounds known as terpenes, oleoresin, zingierol, zingiberone, and zingiberene.
The non-volatile pungent compounds include the gingerols and shogaols.
These compounds include 6-gingerol, 8-gingerol, 10-gingerol, 10-shogaol, 6-shogaol, zingerone, and paradol are the major constituents of the lipophilic ginger rhizome extract.
Fresh ginger rhizome contains high amount of gingerol and low amount of zingerone. Cooking or drying transforms gingerol into zingerone through a retro-aldol reaction
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