Wow, this one is good! I have taken many brands, including NOW Foods, Natural Factors and Doctor's Best. Jarrow Ginkgo is not cheap but it is very potent. Ginkgo is one of the few herbs that has been found to cross the blood-brain-barrier (BBB). Initial headaches or dizziness are natural symptoms. Cut down by taking on alternate days until the body adjusts itself. Jarrow Ginkgo helps to chase away mental-fogginess for me. Love what it does for my mental focus like what CoQ10 does for my sports performance. It is good for my mum who has high blood-pressure. I have low blood-pressure, so I do even better with Now Foods Ginkgo with Gotu Kola and Siberian ginseng (Eleutherococcus senticosus).
Gingko has so many health benefits that I am forced to take it. Gingko normally gives me headaches (narrow arteries in the brain) but I find if I take this 3 days on and 1 day off that the headaches are kept away and it does definitely improve brain performance. Alertness is definitely heightened.
I have not take this product long enough to feel a difference, but I have been told by many reputable sources that Ginkgo Biloba is good for memory enhancement as well as other health benefits. This particular product offers the highest amount of mg, so I do not need to take as many. I was taking a different brand, but this brand seems to have good endorsements.
Very happy with this product...it avoids me taking 'prescription' drugs for a problem I have....great product, great service from Iherb. Great customer service is always REALLY important to me and with IHERB - this is what you get. ;0)