Curry Tree: Benefits, Dosage, Contraindications

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Murraya koenigii belongs to the family Rutaceae, commonly referred to as the curry leaf tree. It is a shrub reaching a height of 6 meters, with semi-deciduous leaves. It originates from India, Sri Lanka, and other South Asian countries. The leaves are aromatic and contain proteins, carbohydrates, fibers, minerals, carotene, nicotinic acid, and vitamin C. It also contains alkaloids. The plant is used in traditional Indian medicine for various ailments. It is considered a tonic and stomachic. The roots and bark are used externally for skin eruptions. The green leaves are used for fever and dysentery, vomiting, diabetes.

Other name(s) 

Kaloupilé, Curry Leaf, Kadi Patta, Cari Leaf

Scientific name(s)

Murraya koenigii

Family or group: 

Plants

Active ingredients:

Iron

Murrayacine

Mahanimbine

Mahanine

Beta carotene

Alkaloids


Indications

Rating methodology

EFSA approval.

Several clinical trials (> 2) randomized controlled with double blind, including a significant number of patients (>100) with consistently positive outcomes for the indication.
Several clinical trials (> 2) randomized controlled with double blind, and including a significant number of patients (>100) with positive outcomes for the indication.
One or more randomized studies or multiple cohorts or epidemiological studies with positive outcomes for the indication.
Clinical studies exist but are uncontrolled, with conclusions that may be positive or contradictory.
Lack of clinical studies to date that can demonstrate the indication.


Benign Prostatic Hyperplasia
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The intake of 300 mg of standardized M. koenigii leaf extract and T terrestris, twice a day for 12 weeks, was as effective as tamsulosin (a medication used as an alpha-blocker) in treating symptoms of benign prostatic hyperplasia.

Posologie

posologieOrally: leaf

posologie600 mg

duration12 - weeks

populationMen

formulationhydro-alcoholic extract, dry extract


Synergies


Cardiovascular Diseases
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Curry leaf powder was tested in a small clinical study among 50 postmenopausal women with a history of hyperlipidemia. The group consuming 5 g of curry powder for 45 days showed an increase in HDL cholesterol and a decrease in LDL cholesterol, total cholesterol, and triacylglycerides, consequently reducing the incidence of cardiovascular diseases. In some studies, the early appearance of an atheroma caused by LDL cholesterol oxidation was reduced by the antioxidant effects of curry powder, suggesting prevention of cardiovascular diseases.

Posologie

posologieOrally: leaf

posologie5 g

duration45 - days

formulationhydro-alcoholic extract, dry extract


Oral Infections
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Ethanolic and aqueous extracts of Murraya koenigii L. were effective against S. mutans (Streptococcus mutans is a bacteria part of the oral cavity's commensal flora). The ethanolic extract was effective in inhibiting Lactobacillus brevis and Actinomyces viscosus. The aqueous extract also inhibited Lactobacillus casei. It is suggested that the antimicrobial effect of curry leaves is due to its phytochemical constituents like carotene, beta-carotene, calcium, iron, phosphorus, zinc, folic acid, and riboflavin.

Posologie

posologieOrally: leaf

formulationhydro-alcoholic extract, dry extract


Diarrhea
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Curry leaves are traditionally used in Ayurveda for gastrointestinal disorders, particularly for diarrhea.

Posologie

posologieOrally: leaf

posologie3 - 6 g

formulationhydro-alcoholic extract, dry extract


Wound
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Local application of crushed curry leaves helps in improving burns, bruises, and insect bites. The plant also seems to have antibacterial and antifungal effects.

Posologie

posologieOrally: leaf

posologie3 - 6 g

formulationhydro-alcoholic extract, dry extract


Alzheimer's Disease
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Murrya koenigii might have a beneficial potential role in neuroprotection against neurodegenerative diseases like Alzheimer's disease.

Posologie

posologieOrally


Properties


Gastroprotective

full-leaffull-leaffull-leafempty-leaf

In vivo studies (on rats) have shown that aqueous and ether extracts of M. koenigii have anti-ulcer activity. The aqueous extracts of the leaves resulted in a reduction of ulcerative lesions and seem to be as protective as ranitidine (a gastric antisecretory treatment).


Digestive Effect

full-leaffull-leaffull-leafempty-leaf

Kurryam and koenimbine (in seeds) have shown significant inhibitory activity against diarrhea. Ethanolic and aqueous extracts of M. koenigii leaves have shown significant anthelmintic activity at a concentration of 100 mg/mL, against Pheretima posthuma.

Usages associés

Diarrhea

Hypoglycemic

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In vivo studies (on rats) have shown that curry tree leaves have a hypoglycemic activity. This effect seems related to mahanimbine, a constituent of Murraya koenigii. The possible mechanism could be the potentiation of insulin's effect, either by increasing pancreatic insulin secretion from beta cells of the islets of Langerhans, or by enhancing peripheral glucose uptake. Mahanimbine has also shown a non-negligible inhibitor effect on alpha amylase compared to acarbose (an oral antidiabetic medication).

Usages associés

Cardiovascular Diseases

Antioxidant

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Mahanimbine and koenigine, two alkaloids isolated from M. koenigii leaves, have shown antioxidant activity. Koenigine has also shown a property for free radical scavenging.


Cognitive Function

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A study showed that M. koenigii leaf extract improves memory and learning abilities in aged hypoxic mice. The ethanolic leaf extract was observed to lower serum cholesterol in mice, inhibit acetylcholinesterase enzyme, and consequently increase acetylcholine concentration in the brain, enhancing memory in aged mice.


Antimicrobial

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M. koenigii acts as an antimicrobial against various bacteria such as P. aeruginosa, S. pneumoniae, S. aureus, K. pneumoniae, and E. coli.

Usages associés

Oral Infections

Dermatological Effect

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The essential oil cream formulation from M. koenigii leaves showed minimal sun protection activity and can be used to maintain the natural skin pigmentation or as an adjuvant. M. koenigii extract is also included in a cosmetic lightening product for its moisturizing, antioxidant, and hyaluronidase inhibitory activity.

Usages associés

Wound

Anticancer

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M. koenigii induces apoptosis in human myeloid cancer cells. The results show that mahanine inhibits cellular survival factors and disrupts the cell cycle progression. Another study reported that mahanine purified from M. koenigii leaves shows dose- and time-dependent antiproliferative activity in acute lymphoblastic and chronic myeloid leukemia cell lines, with minimal effect on normal immune cells, including CD34 (+) cells.

Usages associés

Benign Prostatic Hyperplasia

Hypocholesterolemic

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In aged mice, a dose-dependent hypocholesterolemic activity has been demonstrated. This effect is comparable to a standard hypocholesterolemic treatment (simvastatin). Carbazole alkaloids, a major phytochemical constituent of the plant, may be responsible for this effect.

Usages associés

Cardiovascular Diseases

Neurological

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Murrya koenigii seems to have a potential neuroprotective role against neurodegenerative diseases such as Alzheimer's disease. In vivo studies have shown an antioxidant effect in the brain, an increase in acetylcholine levels, and a decrease in anticholinesterase activity.

Usages associés

Alzheimer's Disease


Safety dosage

Adult: 3 g - 6 g

No official recommendation has been established, but the leaf powder at a rate of 3 to 6 g has been used safely.


Precautions

Pregnant women: avoid

Avoid due to lack of data.

Nursing woman: avoid

Avoid due to lack of data.