(Siebold & Zucc.) Maxim.
|Nutritional value per 100 g (3.5 oz)|
|Energy||59 kJ (14 kcal)|
|Thiamine (vit. B1)||0.02 mg (2%)|
|Riboflavin (vit. B2)||0.02 mg (2%)|
|Niacin (vit. B3)||0.2 mg (1%)|
|Pantothenic acid (B5)||0.032 mg (1%)|
|Vitamin B6||0.096 mg (7%)|
|Folate (vit. B9)||10 μg (3%)|
|Vitamin C||31.5 mg (38%)|
|Calcium||103 mg (10%)|
|Iron||0.1 mg (1%)|
|Magnesium||13 mg (4%)|
|Manganese||0.274 mg (13%)|
|Phosphorus||12 mg (2%)|
|Potassium||655 mg (14%)|
|Sodium||7 mg (0%)|
|Zinc||0.16 mg (2%)|
|Link to USDA Database entry
Percentages are relative to
US recommendations for adults.
Source: USDA Nutrient Database
Petasites japonicus, (Japanese: 菜蕗) also known as Fuki, bog rhubarb, or giant butterbur, is an herbaceous perennial plant in the family Asteraceae. It is native to Japan, where the spring growth is used as a vegetable. It has also been introduced to southern British Columbia by Japanese immigrants.
The traditional preparation method for this vegetable involves pre-treating with ash or baking soda and soaking in water to remove harshness (astringency), which is a technique known as aku-nuki (灰汁抜き, literally "harshness removal"). The shoot can be chopped and stir fried with miso to make Fuki-miso which is eaten as a relish thinly spread over hot rice at meals.
The bulb-like shoots are also picked fresh and fried as tempura.
Like other Petasites species, fuki contains pyrrolizidine alkaloids which have been associated with cumulative damage to the liver and tumor formation. The concentration of potentially hepatotoxic pyrrolizidine alkaloids are below the detection limits in modern butterbur extracts.
Petasites japonicus has anti-inflammatory activity in a mouse model of asthma. Based on additional studies in mice, the plant may contain plasma and hepatic lipid-lowering and antioxidant compounds.
- Pojar, Jim; MacKinnon, Andy. Plants of the Pacific Northwest Coast. Lone Pine Publishing, 1994, p. 294, ISBN 978-1-55105-040-9
- Fu, P.P., Yang, Y.C., Xia, Q., Chou, M.C., Cui, Y.Y., Lin G. (2002). "Pyrrolizidine alkaloids-tumorigenic components in Chinese herbal medicines and dietary supplements". Journal of Food and Drug Analysis 10 (4): 198–211.
- Maxim Hirono I., Mori H., Yamada K. (1977). "Carcinogenic activity of petasitenine, a new pyrrolizidine alkaloid isolated from Petasites japonicus". Journal of the National Cancer Institute 58 (4): 1155–1157.
- Kalin P., Buel E.S.,"The common butterbur - Petasites hybridus. Portrait of a medicinal herb: History, pharmacology, clinical applications". Schweizerische Zeitschrift fur GanzheitsMedizin. 14 (5) (pp 267-274),
- Lee J.-S., Yang E.J., Yun C.-Y., Kim D.-H., Kim I.S. (2011). "Suppressive effect of Petasites japonicus extract on ovalbumin-induced airway inflammation in an asthmatic mouse model". Journal of Ethnopharmacology 133 (2): 551–557. doi:10.1016/j.jep.2010.10.038.
- Park C.H., Kim M.Y., Sok D.-E., Kim J.H., Lee J.H., Kim M.R. (2010). "Butterbur (Petasites japonicus Max.) extract improves lipid profiles and antioxidant activities in monosodium L-glutamate-challenged mice". Journal of Medicinal Food 13 (5): 1216–1223. doi:10.1089/jmf.2009.1380. PMID 20828319.
|Wikimedia Commons has media related to: Petasites japonicus|
|Wikispecies has information related to: Petasites japonicus|