Still to be proven. A lot of herbs have said to help and various cultures have used various products for centuries stating these help but we scientist need hard core data to prove double blind ad is a complicated illness with genetic markers and plaque formation and apoe4 and the understanding we have now than before is making quantum leap but. Not there yet visit nia national institute of aging.
No. Gingko biloba has been studied both as a preventative and an agent to help those already with alzheimer's disease, and it is absolutely worthless and a waste of money. In addition, can promote poor clotting. Do not use it!