Folic acid (folate) is an important B vitamin that can sharpen the mind and delay the onset of Alzheimer's. The recommended daily dose for good health is 400 micrograms. Folate is found in foods such as oranges, strawberries, dark green leafy vegetables, and beans. It is also added to cereals and flour products in the United States.
Middle aged people who were treated with the B vitamin folic acid improved test scores and memory, and slowed mental decline in this group. Homocysteine, an amino acid found in the blood that has been linked to heart disease and stroke, was decreased in the group who was treated with folic acid. An insulin nasal spray has been tried in tests to enhance memory and delay the onset of Alzheimer's. These studies were presented at the first International Conference on Prevention of Dementia presented by the Alzheimer's Association.