Ginkgo Biloba For Alzheimer's Disease
Ginkgo biloba, an herbal
extract,increases memory in demented and non-demented elderly . How
effective is ginkgo biloba? A recent study compared the ability of metrifonate,
donepezil, tacrine, rivastigmine, and ginkgo biloba on cognitive ability in
alzheimer patients. The study used the ADAS-cognitive subscale as a measure of
cognition in patients. The study reports that ginkgo biloba improves cognitive
scores as much as the other drugs tested . Two other studies find that 26 to
27 percent of alzheimer patients show more than 4 point improvements on the ADAS
cognitive subscale,which is comparable to results found with cholinesterase
inhibitors, such as donepezil [84-85].Ginkgo biloba also increases the abilities
of alzheimer patients to perform routine activities of daily living and
decreases depression .
How does ginkgo biloba work?
Researchers are not certain how ginkgo biloba works. Ginkgo biloba is known to
greatly increase blood flow. In fact, the extract has been used to treat painful
intermittent claudication in the legs; this condition is partly caused by poor
blood flow to the legs , which ginkgo biloba reverses. In addition,ginkgo
biloba protects cultured brain cells from the toxic effects of amyloid beta
protein . Ginkgo biloba also increases the frequency of brain waves, by
promoting higher frequency alpha waves .