Loquat

Botanical Overview

Loquat (Eriobotrya japonica) is a flowering plant in the Rosaceae family. Traditional medicine systems have documented several valuable applications for this species, supported by its observed therapeutic effects. The rose family (Rosaceae) includes trees, shrubs, and herbs with five-petaled flowers and numerous stamens. Many species produce edible fruits such as apples, pears, cherries, and berries. The family includes both ornamental roses and many species with astringent and medicinal properties.

General Description

It is also cultivated as an ornamental plant.

ⓘ Information
Description adapted from Wikipedia (CC BY-SA 4.0).

Family Context

The Rosaceae family is widely distributed in temperate regions. Notable medicinal members include:

Geographic Distribution

Loquat has been recorded in 10 countries and territories worldwide, including Australia, Brazil, China, Spain, France, and others.

Traditional Uses

Loquat has been traditionally used for digestive health, respiratory conditions, and skin and wound care, among other applications.

Digestive health.

  • Diarrhea
  • Ache(Stomach)
  • Stomachic

For digestive complaints, the herb is typically prepared as a tea or decoction taken before meals. The bitter compounds stimulate digestive secretions and improve nutrient absorption. Some traditions use the powdered root or leaves in small doses as a stomachic tonic.

Respiratory conditions.

  • Expectorant
  • Cough

Respiratory conditions are addressed through steam inhalation of the herb’s vapors or internal use as a warm tea. The hot infusion acts as an expectorant, helping to loosen phlegm and clear congestion. Some traditions combine it with honey for coughs.

Skin and wound care.

  • Sore

For skin conditions, the fresh or dried plant is applied topically as a poultice, wash, or compress. A strong decoction can be used to clean wounds and sores. The antimicrobial properties help prevent infection while promoting tissue repair.

Active Compounds

Phytochemical research has identified 30 compounds in this species, including a diverse array of phytochemical classes (see the Complete Chemical Inventory below for the full list).

The identified compounds include the following categories:

  • Sterol: cholesterol-like compounds with anti-inflammatory properties
ⓘ Information
Information on this page is compiled from Dr. Duke’s Phytochemical and Ethnobotanical Databases (USDA ARS), a public domain resource. Consult a healthcare professional before using any herbal preparation.

Distribution and Conservation

Reported distribution: Australia, Brazil, China, Spain, France, Italy, New Zealand, Portugal, Reunion, United States.

Complete Use Records

CategoryCultural Context
DiarrheaElsewhere, Indochina
ExpectorantChina, Elsewhere
NauseaChina, Elsewhere
ThirstChina, Elsewhere
Ache(Stomach)China
AntitussiveChina
CancerJapan
ChafeChina
CoughChina
CyanogeneticChina
DepressionIndochina
EpistaxisChina
PertussisChina
RefrigerantElsewhere
SmallpoxChina
SwellingIndochina
Wine-NoseChina
HemoptysisChina
SedativeElsewhere
CoryzaChina
SoreChina
StomachicElsewhere

Complete Chemical Inventory

CompoundFormulaMW
1-BETA-HYDROXY-EUSCAPHIC-ACID
2-ALPHA-3-ALPHA-19-ALPHA-TRIHYDROXY-URS-12-EN-28-OIC-ACID
2-ALPHA-3-BETA-19-ALPHA-23-TETRAHYDROXY-URS-12-EN-28-OIC-ACID
23-CIS-P-COUMAROYL-TORMENTIC-ACID
23-TRANS-P-COUMAROYL-TORMENTIC-ACID
2ALPHA-HYDROXYURSOLIC-ACID
3,6,19-TRIHYDROXY-URS-12-EN-28-OIC-ACID
3-BETA-6-ALPHA-19-ALPHA-TRIHYDROXY-URS-12-EN-28-OIC-ACID
3-O-TRANS-CAFFEOYLTORMENTIC-ACID
3-O-TRANS-P-COUMAROYL-ROTUNDIC-ACID
3BETA,6BETA,19ALPHA-TRIHYDROXY-URS-12-EN-28-OIC-ACID
ALPHA-CAROTENEC₄₀H₅₆536.9 Da
AMYGDALINC₂₀H₂₇NO₁₁457.4 Da
ARACHIDIC-ACIDC₂₀H₄₀O₂312.5 Da
ARSENICAs74.92159 Da
ASCORBIC-ACIDC₆H₈O₆176.12 Da
ASCORBIC-ACID-OXIDASEC₃₅H₃₆N₆O₃588.7 Da
ASH
AUCAPARINC₁₄H₁₄O₃230.26 Da
AUCUPARINC₁₄H₁₄O₃230.26 Da
BENZALDEHYDEC₇H₆O106.12 Da
BETA-CAROTENEC₄₀H₅₆536.9 Da
BETA-SITOSTEROLC₂₉H₅₀O414.7 Da
CAFFEIC-ACIDC₉H₈O₄180.16 Da
CALCIUMCa40.08 Da
CAMPESTEROLC₂₈H₄₈O400.7 Da
CARBOHYDRATES
CERYL-ALCOHOLC₂₆H₅₄O382.7 Da
CERYL-PALMITATE
CITRIC-ACIDC₆H₈O₇192.12 Da

Data from PubChem (NIH/NLM, public domain).


References & Further Reading

External Research Links

Data Sources