The Herb Cabinet 本草

龙眼肉 lóng yǎn ròu

Dimocarpus longan · longan, dragon-eye fruit

Warm Sweet HeartSpleen

“Dragon-eye fruit — sweet enough for dessert, kind enough for medicine. For the pale, tired, and sleepless, I'd rather prescribe something that tastes like this.” — Lao Xinglin

What the tradition says

Peel a longan and the name explains itself: a translucent globe with a dark seed at its center — the dragon's eye. The dried flesh is the tradition's most pleasant blood tonic: sweet and warm, it nourishes heart blood and calms the spirit for the palpitations, forgetfulness, and unsettled sleep of the overworked and undernourished^[1]. It shares chief duties in Gui Pi Tang, pairing with huang qi so that qi and blood are rebuilt together — and it appears just as often in kitchens, simmered with red dates into the sweet soups a grandmother prescribes for exam season.

What the research says

Longan is studied as a fruit — polysaccharides, antioxidants, mild sedative signals in animal work — not as a clinical therapy. No trial evidence exists to summarize; its standing is culinary, traditional, and affectionate.

Where to be careful

The cautions of any sweet, warming fruit: the tradition withholds it where dampness or phlegm already clog the middle, and in heat conditions^[1]. The sugar is real — count it as the candy-adjacent food it is. Otherwise, among the safest drawers in the cabinet.

In the pharmacy

The shelled, pitted, dried flesh of Dimocarpus longan — sticky amber petals of fruit, sold everywhere the diaspora shops. Good long yan rou is plump, dark honey-brown, and shamelessly sweet.

Reviewed 2026-08-25