I take Gingko for memory but found it helps my brain function better, faster and succinctly. I used to have brain fog but after changing my diet and eliminating a lot of sugar and wheat plus Gingko it is gone. I feel the Gingko working 15 minutes after taking it. It also helps my circulation, my feet are not as cold as they used to be. I take two 120mg capsules a day, one in the morning after I drink a glass of warm water with gluten free breakfast bar and then another capsule at 3pm to help the afternoon energy slump at work.