carcinogenicity and general toxicity by gingko http://www.ncbi.nlm....les/PMC3929544/
synaptik not sure which homopath taught you that a very resilient plant which ability to age well for a real long time with ability to tolerate extreme conditions like radiation is good for man to consume. some of the most toxic plants and fungi out there are exactly that, quite resilient amazing resistance to the elements hence why they can survive so well.
I'm just not buying this research... at all. There's a good rebuttal by Life Enhancements which explains why, so I'll post some of the main points of contention;
Exceeding Normal Human Doses by 55–108 Times!
Not surprisingly, the worst results were in the highest dose groups. For example, the two year study with rats found that 1,000 mg/kg of body weight found the greatest toxicity, with virtually no toxicity noted in the lowest doses tested. The human equivalent dose of the highest doses used in these studies would be just over 900 milligrams per pound of body weight, five times a week for 50–60 years (rats generally live 2–3 years).2 It should be noted that the most common dose used by humans (240 mg/70 kg [“average” human bodyweight]) is only a fraction of even the lowest dose tested (62.5 mg/kg in the 3-month rat study). The American Botanical Council confirmed that the doses given to the rodents were 55–108 times higher than the normal human levels of consumption of standardizedGBE!3,5
Not surprisingly, the worst results were in the highest dose groups. For example, the two year study with rats found that 1,000 mg/kg of body weight found the greatest toxicity, with virtually no toxicity noted in the lowest doses tested.
...the announcement and publicity given to this study comes from what is perhaps the most anti-supplement group anywhere, the Center for Science in the Public Interest.
procured by the Shanghai Xing Ling Science and Technology Pharmaceutical Company, Ltd.5 SC-GBE is known to have a different chemical profile from what is commonly considered the gold standard of GBEs—Willmar Schwabe Pharmaceutical Co.’s EGb 761
...regarding the discrepancy of SC-GBE to other standardized GBEs was the use of corn oil as the vehicle of administration in the NTP rat and mice studies. “NTP has long-used corn oil as a vehicle,” said Bill Gurley, PhD, a professor of pharmaceutical sciences at the University of Arkansas for Medical Sciences College of Pharmacy. “Several studies have shown that prolonged administration of corn oil can produce some unexpected toxicities. Botanical extracts are not consumed in conjunction with corn oil by humans on a chronic basis. This alone makes the study results applicable only to this group of [animals]. In general, corn oil can improve the oral bioavailability of many phytochemicals and thus may increase the toxicity and/or carcinogenicity of certain phytochemicals (e.g., ginkgolic acids).”
With it's well-established safety profile in dozens of studies, my conclusion is the same as the author's until more (and better) evidence comes to light:
Bottom line: I think the NTP “study” was just another fraudulent government-sponsored “take-out piece,” designed to discredit a time-honored natural supplement with a wide range of clinical uses. As for me, I’ll continue to take 240 mg of Ginkgo daily for its plethora of beneficial effects.
Ward Dean, M.D.
http://www.life-enha...kgo-biloba-safe