Longan

At a Glance

Common name

Longan

Scientific name

Dimocarpus longan

Family

Sapindaceae

Region

Southern China, Southeast Asia

Plant part

Dried aril (fruit flesh)

Caffeine

None

Evidence

Insufficient

Safety review

Safety information on file

Botanical Description

A sweet tropical fruit of southern China, dried for use in calming and tonic teas in Traditional Chinese Medicine.

An evergreen tree with glossy pinnate leaves and clusters of small, round fruits with thin, leathery shells and translucent, jelly-like arils surrounding a dark seed (the 'dragon's eye').

Historical Background

Longan has been cultivated in southern China for over two thousand years and is a familiar ingredient in TCM tonics and sweet teas.

Earliest recorded uses: Recorded in Chinese Materia Medica as a sweet, warming tonic for the spleen and heart.

Cultural significance: A beloved ingredient in Chinese tonic soups and teas, often paired with red dates and goji berries.

Traditional Uses

These uses document historical traditions and do not imply proven effectiveness.

Flavor & Aroma

Aroma: Sweet, fruity, delicately floral

Tea Preparation

Modern Evidence

Contains polysaccharides and phenolics with antioxidant activity studied in vitro; traditional calming uses align with folk practice, though clinical trials are limited.

Evidence levels describe the state of research for the traditional use discussed here, not a recommendation. Historical use does not imply effectiveness.