|Photo: Ginkgo tree w/ dinosaurs J. Agnew|
Those interested in learning how to enhance their longevity may want to look to Gingko Biloba, whose very existence today as a "living fossil" speaks volumes to its ability to survive conditions that would otherwise kill or dramatically shorten the lifespan of most other species.
There is a thread of biological immortality woven into all things that are living. Anything that breathes or pulsates with life today contains within its germline genetic information that originated from a last universal common ancestor (LUCA), and from which all living things -- plants, bacteria, fungi and animal included -- descended. While somatic cells within multicellular organisms perish, their germline stem cells are capable of infinite self-replication, which in the case of gingko biloba, has been going on for at least a quarter of a billion years.
Ginkgo biloba is the world's oldest living plant, and is known as a "living fossil" because it has no close living relatives, and appears to be the same as a plant species dating back 270 million years (Permian) in the fossil record. It is also one of a rare few (6%) dioecious flowering plants, meaning it has distinct male and female organisms.
Not only has this exceptionally hardy species survived three mass extinction events over the past quarter of a billion years, but it was found to be the only surviving plant species near the epicenter of the August 6th, 1945 Hiroshima atomic bomb blast. In September 1945, the area around the blast center was examined and six Gingko biloba trees were found standing. They budded shortly after the blast without major deformations and are still alive to this day. To learn more about the Hiroshima Ginkgo trees visit The Ginkgo Pages.
Interestingly, the same plant that survived exposure to a wide range of radioisotopes released by nuclear blast, including radioiodine-131, is capable of conferring radioprotective properties to humans exposed to at least one of the same elements. Graves' disease patients receiving radioiodine-131 therapy, which is known to cause chromosomal damage, have been found to benefit from receiving a gingko biloba supplement before treatment by experiencing reduced damage to their DNA. You can view the study published in 2007 in the Journal of Clinical Endocrinology and Metabolism here.
Ginkgo not only has a reputation for longevity, with some plants living to over 1,000 years, but it appears willing to confer longevity to those who use consume it extracts of it.
Indeed, a solid body of preclinical and clinical research indicates that it is useful in age-associated cognitive decline, e.g. Alzheimer's disease, dementia, as well as age-associated visual disturbances such as glaucoma. There is also indication that it may slow the aging process within the mitochondria of cells by reducing oxidative stress and enhancing mitochondrial respiration,[i] and this mitochondrial anti-aging effect is not limited to neurons, but extends to other cell lineages such as blood platelets,[ii] and fibroblasts,[iii] liver cells,[iv]endothelial cells,[v] heart cells[vi] and likely many others yet to be investigated.
One of the most encouraging studies on gingko biloba, which we explored in a previous article,Declaring Chemical Warfare Against Alzheimer's, showed that it was more effective than the blockbuster alzheimer's drug donepezil for treating symptoms of mild-to-moderate Alzheimer's disease.
What is even more remarkable is that this plant has been shown capable of articulating over 30 different beneficial physiological actions that may be of therapeutic value in over 100 health conditions. Those conditions in the "A" group are listed below:
- Aging: Brain
- Allergic Airway Diseases
- Allergic Conjunctivitis
- Aluminum Toxicity
- Alzheimer's Disease
- Amyotrophic Lateral Sclerosis
- Arterial Thickening
- Aspiring-Induced Toxicity
- Attention Deficit Disorder
- Attention Deficit Disorder with Hyperactivity
- Autism Spectrum Disorder
A word of caution for those who wish to use ginkgo biloba. Its seeds contains physiologically significant levels of a naturally occurring neurotoxin known as ginkgotoxin (4'-O-methylpyridoxine), which as an antivitamin is structurally related to vitamin B6 (pyroxidine) and can cause neurological problems in those who are susceptible, may be deficient in B6, and/or who consume high amounts. The leaves are generally considered harmless, but it never hurts to be careful, especially if there is a history of seizures.
Also, many herbs are subject to "cold pasteurization" with gamma radiation, indicating that they could contain formaldehyde and formic acid, as well as unique radiolytic byproducts which may be toxic. Ask the manufacturer if they have tested their raw material for such exposure, or opt for a certified organic brand if accessible.
[i] Anne Eckert. Mitochondrial effects of Ginkgo biloba extract. Int Psychogeriatr. 2012 Aug ;24 Suppl 1:S18-20. PMID: 22784423
[ii] Chun Shi, Songhua Xiao, Jun Liu, Kaihua Guo, Fengming Wu, David T Yew, Jie Xu. Ginkgo biloba extract EGb761 protects against aging-associated mitochondrial dysfunction in platelets and hippocampi of SAMP8 mice. Platelets. 2010;21(5):373-9. PMID: 20459350
[iii] Xiao-ping Song, Zhi-wu Chen, An-ning Fang, Pei-fei Fang. [Experimental study on effect of total flavone of Ginkgo biloba on delaying cell senescence]. Zhong Yao Cai. 2009 Jan;32(1):100-2. PMID: 19445133
[iv] Shang-Zhen Huang, Yan-Jun Luo, Li Wang, Ke-Yin Cai. Effect of ginkgo biloba extract on livers in aged rats. World J Gastroenterol. 2005 Jan 7 ;11(1):132-5. PMID: 15609412
[v] Xie Xu Dong, Zhu Jun Hui, Wang Xing Xiang, Zhang Fu Rong, Sun Jian, Chen Jun Zhu. Ginkgo biloba extract reduces endothelial progenitor-cell senescence through augmentation of telomerase activity. J Cardiovasc Pharmacol. 2007 Feb;49(2):111-5. PMID: 17312453
[vi] G Fitzl, K Welt, L Schaffranietz. Myocardium-protective effects of Ginkgo biloba extract (EGb 761) in old rats against acute isobaric hypoxia. An electron microscopic morphometric study. I. Protection of cardiomyocytes. Exp Toxicol Pathol. 1996 Jan ;48(1):33-9. PMID: 8919269
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