Galangal

Galangal is a ginger relative, but the oil smells nothing like ginger. Cineole and pine notes dominate instead of the warm spice, making it sharp, camphorous and peppery. Greater galangal is the Thai cooking rhizome, while lesser galangal is smaller, hotter and older in the herbal record. Distilling fresh rather than dried rhizome gives more of the volatile compounds and better cell protection.^[1] The oil also killed stored-grain beetles as effectively as synthetic fumigants in testing.^[1]

Greater Galangal

Alpinia galanga

Also Known As: Galangal, Thai Ginger, Blue Ginger, Laos Root
Family: Spice
Perfumery Note: Middle
Intensity: Medium
Extraction: Steam Distillation
Plant Parts: Roots
Origins: Thailand, Indonesia, Malaysia, Vietnam, India
Effect: Respiratory Support, Energy & Uplifting
Aroma: Spicy, Peppery, Camphoraceous, Earthy, Warm
Applications: Diffusing & Inhalation, Massage & Body, Cooking & Flavouring
Price: $$$$Galangal rhizomes are widely cultivated across Southeast Asia as an agricultural commodity; oil yield is moderate and the oil is commercially available at accessible pricing

This is the galangal of Thai curry paste, a knobbly rhizome that looks like ginger and tastes nothing like it. The oil is built on 1,8-cineole and alpha-pinene, with methyl cinnamate adding a sweet, almost balsamic edge. The result is camphorous and peppery rather than warm. How it is dried matters: distilling fresh rhizome keeps more of the volatile compounds and gives better cell protection than drying first.^[1] In fumigation tests it killed flour beetles at doses competitive with synthetic pesticides.^[1]

Lesser Galangal

Alpinia officinarum

Also Known As: China Root, Colic Root, East India Catarrh Root
Family: Spice
Perfumery Note: Middle
Intensity: Strong
Extraction: Steam Distillation
Plant Parts: Rhizomes
Origins: China, Vietnam
Effect: Energy & Uplifting, Respiratory Support, Focus & Mental Clarity
Aroma: Camphoraceous, Spicy, Clove-like, Warm, Peppery
Applications: Diffusing & Inhalation, Cooking & Flavouring
Price: $$$$Rarer in commercial production than Greater Galangal, with smaller rhizomes and lower oil yield concentrated in a handful of Chinese growing regions.

Lesser galangal is the smaller, hotter cousin, known in old herbals as China root and colic root. Its oil is led by 1,8-cineole with farnesene and terpineol, giving a sharper, more clove-like heat.^[2] Galangin, the compound Chinese pharmacopoeia uses to check quality, sits in the non-volatile part, not the oil.^[3] In lab tests the oil held back Gram-positive bacteria and damped inflammatory signalling.^[3] One form of it nearly wiped out Pseudomonas aeruginosa, beating a standard antibiotic,^[4] and it also stopped a crop fungus.^[5]

Essential Nose

Galangal

Greater Galangal

Lesser Galangal

References