These strokes—which generally produce no obvious symptoms—are typically caused by chronic high blood pressure and/or high cholesterol. So be sure your blood pressure and cholesterol are under control.

While there’s no magic memory pill, the following supplements are safe…and beneficial for many people. They can be taken individually or in combination. For absolute safety, use them under a doctor’s supervision.

Antioxidants. Vitamins Ñ and H and the mineral selenium all may help prevent memory loss. I usually tell my patients to take 400 international units (IU) of vitamin E a day,* along with 1,000 milligrams (mg) of vitamin Ñ and 100 micrograms (meg) of selenium. It’s also a good idea to eat lots of fruits and vegetables. They contain lots of other antioxidants.

Phosphatidylserine. This fatty substance was found to be helpful in preventing further deterioration in people with memory problems. In some cases, memory improved after several months of phosphatidylserine therapy. I usually recommend 200 to 300 mg per day. Be patient—it may take three months before you notice any improvement.

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