Thé du Labrador (lédon du Groenland) (Ledum groenlandicum Oeder)

Chartier, Ch.; Staub, H.; Goetz, P.

doi:10.1007/s10298-005-0074-1

Cited by 7 publications

(6 citation statements)

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“…Indigenous populations including CEI used the leaves to prepare herbal tea to treat asthma, colds, scurvy, fever, and stomach and kidney problems [32]. Recent studies also reported activities such as antiparasitic, antitumor, decongestant, diuretic, sedative, and stomachic [33].…”

Section: Rhododendron Groenlandicum (Oeder) Kron and Judd Rmentioning

confidence: 99%

Mechanisms of Action of Indigenous Antidiabetic Plants from the Boreal Forest of Northeastern Canada

Eid

Haddad

2014

Advances in Endocrinology

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Indigenous populations in Canada possess a wealth of native traditional knowledge. However, their rates of Type 2 diabetes mellitus (T2DM), a disease that was unheard of in their midst 50 years ago, are the highest in the country. In an effort to cut the impact of T2DM epidemic on Indigenous health, the Canadian Institutes of Health Research funded the “CIHR Team in Aboriginal Antidiabetic Medicines (CIHR-TAAM).” The goal was to explore Boreal forest medicinal plants stemming from Indigenous Traditional Medicine to be included in T2DM care. Six out of nine communities of the Cree of Eeyou Istchee (CEI) participated in ethnobotanical studies that resulted in the identification of 17 potential antidiabetic plant species. These species were screened for antidiabetic activities using a platform of in vitro bioassays and in vivo models of T2DM. This paper summarizes results on the 10 most promising plant species, their active constituents, and the mechanisms behind their antidiabetic activities. In addition, potential herb-drug interactions were examined at the level of drug-metabolizing enzymes, notably the cytochrome P450 family. This review serves as a canvas onto which is discussed the value of Indigenous medicinal plants, future avenues of research, and the ethical approach required in this field.

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Section: Rhododendron Groenlandicum (Oeder) Kron and Judd Rmentioning

confidence: 99%

Mechanisms of Action of Indigenous Antidiabetic Plants from the Boreal Forest of Northeastern Canada

Eid

Haddad

2014

Advances in Endocrinology

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“…The high content of the essential oil in R. groenlandicum (0.3–2.5%), R. tomentosum (1.75% young shoots, 0.5% aged shoots) and R. neoglandulosum contributes to the specific flavor of the Labrador tea . The main constituents of the above volatile fractions are ledol, palustrol, cyclocolorenone, sabinene, limonene, p ‐cymene, α‐ and β‐pinene, γ‐terpineol and germacrone (Fig.…”

Section: Chemical Compositionmentioning

confidence: 99%

“…). These compounds are present in variable quantities in the plant material, dependent not only on the particular species but also on its habitat and the season of its harvesting . For instance, the essential oil from R. tomentosum shoots from Vilnius region in Lithuania contains 30.5% ledol, a sesquiterpene with toxic activity limiting the allowed frequency of Labrador tea drinking, whereas the plant material from Tomsk province in Russia contains only 3.9% – almost ten times less .…”

Section: Chemical Compositionmentioning

confidence: 99%

“…Apart from the essential oil, Labrador tea contains also flavonoids (quercetin, hyperoside, arbutin), phenolic acids and tannins. Furthermore, it is a rich source of vitamins (ascorbic acid, 982 mg kg −1 ; niacin, 92 mg kg −1 ; riboflavin, 4 mg kg −1 ; thiamine, 0.1 mg kg −1 ) as well as mineral salts (calcium, 2150 mg kg −1 ; magnesium, 730 mg kg −1 ; iron, 184 mg kg −1 ; zinc, 24 mg kg −1 ), especially where R. groenlandicum is concerned …”

Section: Chemical Compositionmentioning

confidence: 99%

“…The high content of tannins (8–17%) can be regarded as the cause of digestive problems and decrease in iron absorption. However, the addition of milk to Labrador tea is suggested to precipitate tannins . The beverage is contraindicated in pregnant women because of its abortifacient activity …”

Section: Application In the Food Industrymentioning

confidence: 99%

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Labrador tea – the aromatic beverage and spice: a review of origin, processing and safety

Dampc

Łuczkiewicz

2014

J Sci Food Agric

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Labrador tea is a name for the dried leaves of Rhododendron groenlandicum, R. tomentosum or R. neoglandulosum (family Ericaceae, previously genus Ledum) as well as for the beverage native to North America, which is made from them. The above species are rich in the essential oil, which gives a conifer aroma to the tisane. Labrador tea is a valuable source of ascorbic acid, with tonic, improving digestion and relaxing activity. However, this beverage should not be drunk more than once daily because of the ledol and grayanotoxin toxicity. The common recipe for making Labrador tea is to add one teaspoonful of dried leaves to one cup of boiling water and to brew for 5 min. It is often sweetened or enriched with other flavors. Additionally, Labrador tea dried leaves are used to spice meat, soups, sauces, salads, beer, cakes and other dishes. In agriculture, its insecticidal properties can be useful for controlling pests.

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Bioactive Phytochemicals from Canadian Boreal Forest Species Used Traditionally by Eastern James Bay Cree Aboriginals to Treat Diabetes Mellitus

Guerrero‐Analco

Asim

Saleem

et al. 2014

Phytochemicals – Biosynthesis, Function and Application

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Thé du Labrador (lédon du Groenland) (Ledum groenlandicum Oeder)

Cited by 7 publications

References 0 publications

Mechanisms of Action of Indigenous Antidiabetic Plants from the Boreal Forest of Northeastern Canada

Mechanisms of Action of Indigenous Antidiabetic Plants from the Boreal Forest of Northeastern Canada

Labrador tea – the aromatic beverage and spice: a review of origin, processing and safety

Bioactive Phytochemicals from Canadian Boreal Forest Species Used Traditionally by Eastern James Bay Cree Aboriginals to Treat Diabetes Mellitus

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