How can seniors keep their brains in great condition?

Hope. Key is controlling risk factors for vascular disease, most especially even mild high blood pressure which affects the tiny vessels; discover B12 & folate (folic acid) deficiency & thyroid disease early. Studies produce ever-conflicting results, but most recently, treatment with angiotensin-receptor blockers for high blood pressure seems to delay or prevent both vascular and Alzheimer's type dementia.