Ginkgo biloba (Baiguo): the seed of Ginkgo biloba L. (family Ginkgoaceae), with the fleshy outer seed coat removed.
**Nature, Flavor, and Meridian Entry:** Neutral nature; flavors: sweet, bitter, astringent.
【Actions and Indications】 Astringes the lung to relieve dyspnea (dyspnea), arrests leukorrhea and turbid vaginal discharge, and reduces urinary frequency. It is classified under the astringent medicinals (收涩药), specifically the subcategory of medicinals that secure essence, reduce urination, and arrest vaginal discharge (固精缩尿止带药).
【Pharmacological Research】This substance exhibits a range of pharmacological effects, including antibacterial, expectorant, free radical scavenging, antispasmodic, antihypertensive, antitumor, immunomodulatory, and anti-lipid peroxidation activities. It can reduce aortic output while increasing coronary artery flow; significantly enhance the tolerance to hypoxia under normobaric conditions in animals; exert antiallergic effects; delay aging; demonstrate antimicrobial action; treat cerebral ischemia; and contract the isolated uterus. Ginkgolide improves osteoporosis.
Ginkgo biloba, known in Traditional Chinese Medicine (TCM) as Baiguo, is the seed of the ancient Ginkgo biloba L. tree, a living fossil with a remarkable history of medicinal use. After removing the fleshy outer seed coat, the inner seed is processed for therapeutic applications. The Ginkgo biloba Baiguo health benefits are deeply rooted in its unique phytochemical profile, which includes ginkgolides, bilobalide, and flavonoids. In TCM, Baiguo is characterized by a neutral nature and sweet, bitter, and astringent flavors, with meridian entry into the Lung and Kidney channels. Its primary actions are to astringe the lung to relieve dyspnea, arrest leukorrhea and turbid vaginal discharge, and reduce urinary frequency. This makes it a valuable herb in the category of astringent medicinals that secure essence and reduce urination, addressing conditions marked by excessive loss of fluids or energy.
The Ginkgo biloba seed traditional Chinese medicine uses are diverse and well-documented. For respiratory conditions, Baiguo is frequently prescribed for asthma and chronic cough, particularly when accompanied by excessive phlegm or wheezing, as its astringent properties help calm the lung qi. In gynecological and urological contexts, it is used to manage excessive vaginal discharge (leukorrhea) and frequent urination, often combined with other herbs like Huangbai (Phellodendron chinense) or Fuling (Poria cocos). The seeds are also employed in formulas for enuresis (bedwetting) in children and urinary incontinence in the elderly. Beyond these classical indications, modern research has explored Baiguo’s neuroprotective and cognitive-enhancing effects, linking its compounds to improved blood circulation and antioxidant activity, though these applications require careful consideration of dosage and safety.
Despite its therapeutic potential, Ginkgo biloba seed toxicity and safety are critical concerns that cannot be overlooked. Raw or improperly processed Ginkgo seeds contain toxic compounds, primarily ginkgotoxin (4′-O-methylpyridoxine), which can cause severe adverse effects such as seizures, vomiting, and even loss of consciousness. The toxicity is particularly dangerous in children and individuals with epilepsy. To mitigate these risks, seeds must be thoroughly cooked or roasted to reduce toxin levels. The outer fleshy coat is also highly allergenic, causing contact dermatitis. Recommended safe consumption limits are typically 5–10 grams of cooked seeds per day for adults, with strict avoidance of raw seeds. Pregnant and lactating women, as well as those taking anticoagulant medications, should avoid Baiguo due to potential interactions and developmental risks.
Proper Ginkgo biloba seed preparation and dosage are essential for both efficacy and safety. In TCM, the seeds are typically prepared by roasting or boiling until the inner kernel is tender, which deactivates the toxic components. For decoctions, 5–10 grams of prepared seeds are used, often crushed to enhance extraction. They can also be ground into a powder and taken in capsules, with typical doses of 1–2 grams per day. In culinary applications, roasted seeds are added to soups, congee, or stir-fries, but always in moderation. Standardized extracts, such as EGb 761, are derived from leaves rather than seeds and are not directly comparable. When using Baiguo, it is crucial to source high-quality, properly processed seeds from reputable suppliers and to consult a qualified TCM practitioner to determine the appropriate dosage based on individual constitution and condition. Adherence to these guidelines ensures that the health benefits of Ginkgo biloba Baiguo can be harnessed safely and effectively.