جنكو أو جنكة أو جنكو ذو الشقين أو جنكو ذو الفصين أو شجرة المعبد أو مَعبَلة , هو النوع الوحيد المتبقي من صف الجنكويات، وكانت النباتات المنسوبة إلى هذا الصف منتشرة في الحقبة الوسطى، لذا يعتبر هذا النوع من المستحاثات الحية. وهي شجرة نفضية من عاريات البذور. ومع أنها لا تزال موجودة في منطقتين صغيرتين في مقاطعة جيجيانغ شرقي الصين،
•معالجة ضعف دوران الدم في المخ، فهي تقوي دوار الدم في , مما يعني تغذية أكبر وذاكرة وتركيز أقوى.
•تقوية الذاكرة بشكل ملحوظ.
•تحافظ على تدفق الدم إلى الجهاز العصبي بشكل جيد.
•قيمة عالية في علاج الربو.
•تخفض ضغط الدم.
•تحول دون تصلب الشرايين.
•تفيد كثيراً في علاج الخرف.
•تخفض احتمال وقوع السكتة.
•تستخدم في علاج سلسل البول.
•مضادة للأكسدة، فبالتالي تقاوم السرطانات
Ginkgo (Ginkgo biloba) is one of the oldest living tree species and its leaves are among the most extensively studied botanicals in use today. In Europe and the United States, ginkgo supplements are among the best-selling herbal medications. It consistently ranks as a top medicine prescribed in France and Germany.
Ginkgo has been used in traditional medicine to treat circulatory disorders and enhance memory. Scientific studies throughout the years have found evidence to support these uses. Although not all studies agree, ginkgo may be especially effective in treating dementia (including Alzheimer's disease) and intermittent claudication (poor circulation in the legs). It also shows promise for enhancing memory in older adults. Laboratory studies have shown that ginkgo improves blood circulation by dilating blood vessels and reducing the stickiness of blood platelets.
Ginkgo leaves contain two types of chemicals (flavonoids and terpenoids) believed to have potent antioxidant properties.
Antioxidants are substances that scavenge free radicals -- compounds in the body that damage cell membranes, tamper with DNA, and even cause cell death.
Free radicals occur naturally in the body and grow in number as we age. But environmental toxins (including ultraviolet light, radiation, cigarette smoking, and air pollution) can also increase the number of free radicals. Free radicals are believed to contribute to health problems including heart disease and cancer as well as Alzheimer's disease and other forms of dementia. Antioxidants such as those found in ginkgo can help neutralize free radicals and may reduce or even help prevent some of the damage they cause.
Although Chinese herbal medicine has used both the ginkgo leaf and seed for thousands of years, modern research has focused on the standardized Ginkgo biloba extract (GBE), which is prepared from the dried green leaves.
This standardized extract is highly concentrated and seems to be clinically more effective in treating health problems (particularly circulatory ailments) than the non-standardized leaf alone.
What's It Made Of?:
More than 40 components isolated from the ginkgo tree have been identified, but only two are believed to be responsible for the herb's medicinal effects: flavonoids and terpenoids. Flavonoids are plant-based antioxidants. Laboratory and animal studies have shown that flavonoids protect the nerves, heart muscle, blood vessels, and retina from damage. Terpenoids (such as ginkgolides) improve blood flow by dilating blood vessels and reducing the stickiness of platelets.
gingko is used for the following:
Dementia and Alzheimer's disease
Ginkgo is widely used in Europe for treating dementia. It was used originally because it improves blood flow to the brain . A number of studies have found that gingko has a positive effect on memory and thinking in people with Alzheimer's or vascular dementia.
Clinical studies suggest that ginkgo may provide the following benefits for people with Alzheimer's disease:
•Improvement in thinking, learning, and memory (cognitive function)
•Improvement in activities of daily living
•Improvement in social behavior
•Fewer feelings of depression
Several studies have found that ginkgo may be as effective as prescription Alzheimer's medications in delaying the symptoms of dementia.
Because ginkgo improves blood flow, it has been studied in people with intermittent claudication (pain caused by reduced blood flow to the legs). People with intermittent claudication have a hard time walking without feeling extreme pain . In fact, ginkgo has been shown to be as effective as a prescription medication in improving pain-free walking distance. However, regular walking exercises are more beneficial than ginkgo in improving walking distance.
Ginkgo is widely touted as a "brain herb." It has been studied to see whether it can improve memory in people with dementia, and some studies found it did help.
The flavonoids found in ginkgo may help stop or lessen some retinal problems (problems with the back part of the eye). Macular degeneration (often called age-related macular degeneration or ARMD) is an eye disease that affects the retina. It is a progressive, degenerative eye disease that tends to affect older adults and is the number one cause of blindness in the United States. Some studies suggest that gingko may help preserve vision in those with ARMD.
Nerve damage and certain blood vessel disorders can lead to tinnitus (ringing, hissing, or other sound in the ears or head when no external sound is present). Because ginkgo improves circulation, it has been studied to see whether it can treat tinnitus.
A standardized ginkgo extract was reported to significantly improve functional measures (such as coordination, energy level, strength, mental performance, mood, and sensation) in 22 people with multiple sclerosis (MS).
•Standardized extracts containing 24 - 32% flavonoids (also known as flavone glycosides or heterosides) and 6 - 12% terpenoids (triterpene lactones)
•Liquid extracts (tinctures, fluid extracts, glycerites)
•Dried leaf for teas
How to Take It:
Ginkgo is not generally used in children.
Initial results often take 4 - 6 weeks, but should grow stronger beyond that period.
Memory impairment and cardiovascular function: Generally, 120 mg daily in divided doses, standardized to contain 24 - 32% flavone glycosides (flavonoids or heterosides) and 6 - 12% triterpene lactones (terpenoids). If more serious dementia or Alzheimer's disease is present, up to 240 mg daily, in 2 or 3 divided doses, may be necessary.
Intermittent claudication: 120 - 240 mg per day.