How does Lippia graveolens work as an antimicrobial?

Lippia graveolens exerts antimicrobial effects primarily through its volatile compounds carvacrol and thymol. These phenolic compounds disrupt bacterial cell membranes, increasing permeability and causing cell death. The herb also contains flavonoids and rosmarinic acid, which contribute antioxidant and anti-inflammatory activity. In vitro studies demonstrate activity against various bacteria and fungi, though human clinical trials are limited (Evidence Level C).

Does Mexican oregano interact with any medications?

There are no well-documented drug interactions for Lippia graveolens at culinary or typical therapeutic doses. However, due to its potential effects on liver enzymes, it may theoretically interact with medications metabolized by the cytochrome P450 system. Patients taking blood thinners, diabetes medications, or drugs affecting liver function should consult a healthcare provider before using concentrated extracts or high doses (Evidence Level C).

What is the recommended dosage for Lippia graveolens tea?

The typical adult dosage for Lippia graveolens is 2–4 grams of dried herb prepared as a tea, taken up to three times daily. To prepare, steep the dried herb in hot water for 10–15 minutes. This dosage is based on traditional use and limited clinical evidence (Evidence Level C). Higher doses or concentrated extracts should only be used under professional guidance. Always start with the lowest effective dose.

Is Mexican oregano safe during pregnancy?

Lippia graveolens is generally considered safe during pregnancy when used in normal culinary amounts. However, high doses and concentrated essential oils should be avoided, as the volatile compounds may stimulate uterine contractions. Pregnant women should limit use to food amounts and consult a qualified healthcare provider before using therapeutic doses. Safety data is based primarily on traditional use (Evidence Level C).

What is Lippia graveolens used for medicinally?

Lippia graveolens, commonly known as Mexican oregano, is traditionally used for respiratory infections and digestive complaints. Its antimicrobial properties make it useful for coughs, colds, and sore throats, while its carminative effects help relieve bloating and indigestion. The herb is also applied topically for fungal skin conditions. Evidence supporting these uses is limited to in vitro studies and traditional practice (Evidence Level C).

What are the side effects of Mexican oregano?

Lippia graveolens is well-tolerated by most people at recommended doses. Mild digestive upset, including nausea or heartburn, may occur in sensitive individuals. Contact dermatitis has been reported from handling the essential oil, particularly in those with allergies to plants in the Lamiaceae family. Discontinue use if skin irritation or allergic reactions occur. No serious adverse effects have been documented at therapeutic doses (Evidence Level C).

Lippia Graveolens (Lippia graveolens)

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Lippia graveolens, known as Mexican oregano, is a traditional crop rich in bioactive compounds with demonstrated antioxidant, anti-inflammatory, and antimicrobial properties [PMID:34500592].

Contexte

Lippia graveolens (Mexican oregano) is a plant found in Mexico and Central America [PMID:24031796]. It is primarily cultivated for the recovery of its essential oil [PMID:34500592].

Usages traditionnels

In traditional medicine, it is used to treat respiratory and digestive illnesses, headaches, rheumatism, and inflammation-related disorders [PMID:28039793, PMID:27131433].

Composés actifs

The plant contains terpene compounds in its essential oil, including carvacrol, thymol, β-caryophyllene, and p-cymene [PMID:34500592, PMID:30956856]. Flavonoids such as naringenin, pinocembrin, galangin, cirsimaritin, and quercetin O-hexoside are present in extracts [PMID:34500592, PMID:32466359, PMID:38212400]. Additionally, the leaves contain iridoid and secoiridoid glucosides, including caryoptosidic acid and lippioside I and II [PMID:11711112].

Mécanisme d'action

The essential oil exhibits bactericidal effects on Salmonella enterica serovar Typhimurium by causing alterations in cellular ultrastructure without inducing lysis or leakage of cellular material [PMID:38138087]. Phenolic extracts have been shown to lower the release of pro-inflammatory mediators MCP-1 and IL-6 while increasing the secretion of IL-10 [PMID:36169085].

Preuves cliniques

Preuve DInflammation and Oxidative Stress

Phenolic extracts from L. graveolens possess antioxidant and anti-inflammatory properties, significantly inhibiting DPPH radicals and regulating cytokines [PMID:36169085].

Preuve DBreast Cancer (In Vitro)

L. graveolens infusions and polyphenols-rich extracts showed concentration-dependent antiproliferative effects against MDA-MB-231 and MCF-7 cell lines [PMID:36014479, PMID:41097166].

Preuve DMetabolic Syndrome (Murine Model)

Ethanolic extract of L. graveolens stem had a favorable effect on biochemical markers in a murine model of metabolic syndrome induced by monosodium glutamate [PMID:36117783].

Preuve DSkin Carcinogenesis (Murine Model)

Methanolic extract of L. graveolens exhibited a photochemopreventive effect against UVB radiation-induced skin cancer in SKH-1 mice [PMID:28039793].

Preuve DBacterial Infections (In Vitro)

Essential oil and carvacrol show synergistic effects when combined with imipenem against Acinetobacter baumannii and Pseudomonas aeruginosa [PMID:38786172]. It also inhibits A. baumannii biofilm formation [PMID:37887240].

Sécurité et effets indésirables

Methanolic extract of L. graveolens did not exhibit genotoxic activity in the micronucleus test [PMID:28039793].

Interactions médicamenteuses

L. graveolens essential oil and carvacrol exhibit a synergistic effect when used in combination with the antibiotic imipenem, reducing the required dose of the antibiotic to inhibit bacterial growth [PMID:38786172].

Synthèse des preuves

The current evidence is primarily based on in vitro studies and animal models (Level D), demonstrating significant antimicrobial, antioxidant, and antiproliferative potential, but lacking human clinical trials.

Sources PubMed

1.PMID: 34500592 (2021) — Mexican Oregano (Lippia graveolens Kunth) as Source of Bioactive Compounds: A Review. · Molecules (Basel, Switzerland)
2.PMID: 35012189 (2022) — Polyhydroxyalkanoates-Based Nanoparticles as Essential Oil Carriers. · Polymers
3.PMID: 11711112 (1998) — Iridoids from Lippia graveolens. · Phytochemistry
4.PMID: 16355848 (2005) — Antifungal activity of Mexican oregano (Lippia berlandieri Shauer). · Journal of food protection
5.PMID: 36014479 (2022) — Cytotoxic Activity of Polyphenol Extracts from Three Oregano Species: Hedeoma patens, Lippia graveolens and Lippia palmeri, and Antiproliferative Potential of Lippia graveolens against Two Types of Breast Cancer Cell Lines (MDA-MB-231 and MCF-7).

Lippia Graveolens

Sources et citations

Origanum Minutiflorum

Origanum Vulgare Hirtum

Perilla

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Interactions médicamenteuses

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Lippia Graveolens

Sources et citations

Plantes associées

Origanum Minutiflorum

Origanum Vulgare Hirtum

Perilla

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Interactions médicamenteuses

Synthèse des preuves

Sources PubMed

Sources gouvernementales