Eden Apothecary · Herb Profile
Dimocarpus longan
Pronounced Longan: LONG-gun (also LONG-gahn). Dimocarpus longan: dy-moh-KAR-pus LONG-gan. Long Yan Rou: long yen roh.
Warm and moistening: a sweet, honeyed blood and spleen tonic that rebuilds Heart-Blood, nourishes the depleted, and quiets a spirit made restless by deficiency.
Culinary amounts of the fruit are a food-level exposure and are generally regarded as safe; the American Herbal Products Association Botanical Safety Handbook rates longan fruit as a Class 1 (not verified against AHPA) herb (one that can be safely consumed when used appropriately). Therapeutic or concentrated medicinal amounts of the dried aril, however, are traditionally cautioned in pregnancy: classical and modern Chinese-medicine sources hold that its sweet, warm nature can generate internal heat and dampness that may disturb a pregnancy, and several advise pregnant women, especially in the first trimester, to avoid concentrated longan. Reliable modern human safety data for medicinal doses in pregnancy are lacking. Prudent, consumer-safe course: the fruit in normal food amounts is of low concern, but avoid concentrated therapeutic doses in pregnancy unless supervised by a qualified practitioner.
As a food fruit, culinary longan is a food-level exposure of low concern during lactation, and dried longan appears in some traditional postpartum tonic soups. There are no specific modern human safety data for concentrated therapeutic doses of the dried aril during breastfeeding, so reserve medicinal amounts for use under professional guidance. AHPA rates the fruit Class 1 (not verified against AHPA), with no restriction identified for appropriate use.
The fresh or dried fruit is commonly and safely eaten by children in moderation and is a food-level exposure (AHPA Class 1 (not verified against AHPA)). Its high sugar content argues for moderation for dental and blood-sugar reasons. There is no established pediatric dosing for concentrated medicinal preparations of the dried aril; reserve therapeutic tonic doses for use under a qualified practitioner, and treat longan for children mainly as a gentle food in soups and congee.
Longan is a widely eaten subtropical fruit and a food-grade tonic with a long record of safe use; its cautions are largely those of a sweet, warm, sugar-rich food. Eaten in excess it can cause indigestion and, in TCM terms, internal heat with symptoms such as sore throat, mouth ulcers, or acne, and it can generate dampness and bloating in those already damp or phlegmatic. Its high natural sugar content means it should be used sparingly by people with diabetes or blood-sugar dysregulation. Because it is warm and sweet, avoid it in acute heat, fever, and damp-heat conditions. Traditional Chinese sources advise caution or avoidance of concentrated medicinal amounts in pregnancy.
Heat and Fire patterns, fever, and acute inflammation, which its warm sweetness aggravates. Dampness, phlegm, and food stagnation, which its cloying richness worsens. Diabetes and other blood-sugar dysregulation, given its high sugar content (use sparingly and monitor). Known allergy to longan or related Sapindaceae fruits (lychee, rambutan). Therapeutic or medicinal doses in pregnancy without professional guidance, per traditional caution and the absence of modern safety data; culinary amounts of the fruit are a food-level exposure.
Longan is a widely cultivated commercial fruit crop grown across China, Thailand, Vietnam, India, Australia, and subtropical parts of the Americas; it is in no way threatened and is not listed by United Plant Savers. The dried aril used in medicine is a byproduct of ordinary orchard fruit production, so it is abundant and sustainably sourced. Favor fruit from growers using sound orchard practices; the sugar-rich dried fruit is essentially a food commodity.
Not found in the canonical biblical texts nor in the classical Greco-Roman herbals; longan is a fruit of southern China and Southeast Asia, not of the ancient Mediterranean world. Its medicinal use belongs to the Chinese tradition, recorded from the Shen Nong Ben Cao Jing (c. 200 CE) and elaborated in Li Shizhen's Ben Cao Gang Mu (1596), and it became a signature herb of Yan Yonghe's Gui Pi Tang (1253). Cited honestly as a herb of Chinese medical tradition rather than of Scripture.
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