Camellia sinensis (Green tea) : medicinal properties in alcoholic extraction

Camellia sinensis (Green tea, Thé vert) — family Théacées.

Scientific synonyms : Camellia sinensis (L)-Kuntze, var assamica –(J.Masters)-Kitam.

Recognised external sources linked to this monograph: French Pharmacopoeia.

This database documents alcoholic (ethanol) extractions of active substances. Our monograph currently lists 25 indications in alcoholic extraction for this species. The Lapo v2 catalogue records 120 scientific references for this species (full detail in the application).

Important — scientific references on this public page: only a short excerpt of each cited source is shown (selected abstract sentences), kept in the original language of the publication (most often English), without translation. These excerpts are not the full article text and are not a complete bibliography. The full reference records and complete monographic detail are available in the Lapo v2 application (free 30-day trial).

1. 1

   Type II diabetes mellitus

   Plant part used: Sheet. Mentioned synergistic association: association synergique avec EUGENIA UNIFLORA-L (Feuille).

   Scientific references (short excerpts)

   Short excerpts only (not the full article). Full reference records are in the Lapo v2 application.

   • According to VINHOLES J (2017)

     Excerpt Camellia sinensis, the most consumed & popular beverages worldwide, and Eugenia uniflora, a Brazilian native species, have been already confirmed to have beneficial effects in the treatment of diabetes mellitus. Objective: The aim of this study was to evaluate the inhibitory properties of individual & combined ethanolic extracts of the leaves of CS & EU over alpha-glucosidase, a key digestive enzyme used on the Type 2 diabetes mellitus (T2DM) control.

   • According to Setiani LA (2018)

     Excerpt Setiani LA et al, Activity of Antioxidant & Inhibitor α-Glucosidase Instant Granul Ethanol Tea Leaf Extract (Camellia sinensis) & Tea Benalu (Scurulla atropurpureea BL Dans), Jl OF SCI INNOVARE, 01 :01, 2018-Abstract. Tea leaves are plants that are widely spread especially in the area of West Java, while parasites are parasitic plants in tea trees that empirically have various properties such as antioxidants & anti diabetic.

   • According to SHE J (2024)

     Excerpt Less research has been conducted on the association between camellia oil's (CO) phenolic composition & antioxidant capability. In this study, the phenolic profile of CO & its connection to antioxidant capacity were examined utilizing a combination of widely-targeted phenolic metabolomics & multivariate statistical analysis.

   • According to Deep-Kaur C (2011)

     Excerpt The main antioxidant polyphenols present in Camellia sinensis (green tea) are known as epicatechins which function as anti-inflammatory or anticarcinogenic agents. The individual antioxidant activity obtained was 51.12±1.8% &combined antioxidant activity (ascorbic acid with extract) showed additive synergistic effect as compared to that of standard.

   • According to Masitha FS (2019)

     Excerpt Soursop Leaves (Annona muricata) & Tea Leaves (Camellia sinensis) are plants that contain flavonoids which are considered to act as antioxidants & can become chemopreventive agents. The second stage is to examine the antioxidant activity of the combination of ethanolic extract against free radical DPPH (1,1-diphenyl-2-pikrihidrazil).

2. 2

   Cancer: adjuvant treatment of carcinoma: liver, ovarian, sarcoma

   Plant part used: Seed.

   Scientific references (short excerpts)

   Short excerpts only (not the full article). Full reference records are in the Lapo v2 application.

   • According to Ponte MP (2012)

     Excerpt To evaluate the antitumor activity of alcoholic extracts of green tea (Camellia sinensis). Following euthanasia on the tenth day, the tumor, liver, kidneys and spleen were excised and weighed, and tumor volume and tumor growth inhibition were quantified.

   • According to Esghaei M (2018)

     Excerpt MATERIALS & METHODS: A hydroalcoholic extract of C sinensis young leaves was prepared by percolation & compared with Cisplatin as a known anticancer drug for effects on two cell lines: Caco-2, colon carcinoma cells, & mouse normal fibroblasts (L929). Camellia sinensis, whose leaves are used to produce green tea was evaluated for anticancer effects in cell culture.

   • According to Masitha FS (2019)

     Excerpt Soursop Leaves (Annona muricata) & Tea Leaves (Camellia sinensis) are plants that contain flavonoids which are considered to act as antioxidants & can become chemopreventive agents. Docking molecular test of acetogenin & catechin compounds at HER-& ER-α receptors which are biomarkers of breast cancer.

   • According to Choi JH (2006)

     Excerpt The methanol & ethanol extracts of precipitated cells (MEP, EEP) exhibited stronger inhibitory effects on the growth of tumor cell lines than the water extract of precipitated cells (WEP) or the supernatant. The objective of this study was to investigate the antitumor activity of suspension cultures of tea callus cells grown in the presence of different concentrations of the growth regulator 2,4-dichlorophenoxy acetic acid (2,4-D) with or without light irradiation.

   • According to Thakur P (2013)

     Excerpt The present study was conducted to evaluate the antimicrobial activity of aquo-ethanolic (1:1) extract of leaves of Camellia sinensis against Carbapenem Resistant E coli at preclinical level using peritonitis infection model in Sprague Dawley rats. Histopathological studies also presented symptoms of hemorrhage & glomerular damage with structural distortion in glomerular capillary loops of infected groups, which were later recovered in treated groups, indicating the nephroprotective potential of C sinensis PTRC-31911-A.

3. 3

   Dental caries: Streptococcus mutans & Lactobacillus acidophilus

   Plant part used: Sheet.

   Scientific references (short excerpts)

   Short excerpts only (not the full article). Full reference records are in the Lapo v2 application.

   • According to Anita P (2015)

     Excerpt The aim was to evaluate the in vitro antimicrobial activity of Camellia sinensis extract on S. The ethanolic extract was used for assessment of antimicrobial properties.

   • According to Yoon WH (2005)

     Excerpt Antimicrobial & antitumor activities of Camellia sinensis L seed extracts were investigated. Antifungal activity of seed extract was not decreased by heating at 80 & 100∘C100∘C for 30 min or at 121∘C121∘C or 15 min, indicating heat-stability of seed component.

   • According to Thakur P (2013)

     Excerpt The present study was conducted to evaluate the antimicrobial activity of aquo-ethanolic (1:1) extract of leaves of Camellia sinensis against Carbapenem Resistant E coli at preclinical level using peritonitis infection model in Sprague Dawley rats. Histopathological studies also presented symptoms of hemorrhage & glomerular damage with structural distortion in glomerular capillary loops of infected groups, which were later recovered in treated groups, indicating the nephroprotective potential of C sinensis PTRC-31911-A.

   • According to Zvetkova E (2001)

     Excerpt Green & black tea derived from Camellia sinensis have similar qualities. The genus Crinum is thought to possess antiviral & immunostimulative properties.

   • According to EMERA MS (2025)

     Excerpt The antimicrobial potentials of green tea (Camellia sinensis), rosemary (Rosmarinus officinalis) & ginger (Zingiber officinale) extracts against MDR Campylobacter isolates were assessed by the disk diffusion assay & broth microdilution technique. Methods: This study investigated the antimicrobial & antibiofilm activities of some herbal extracts against multidrug-resistant (MDR) Campylobacter species recovered from different sources using phenotypic & molecular techniques.

Further indications (including other extraction modes where applicable), dosages, precautions for use, and the <strong>full scientific references</strong> (complete records, not only the short excerpts above) are available in the complete monographic record in the Lapo v2 application.