It is now considered normal to lose cognitive function as you age -- to experience diminished memory, reasoning and speed in processing information. This "normal" age-related cognitive decline is contrasted to dementias, like Alzheimer's, which are much more debilitating and include severe nerve cell damage and death of nerve cells. In fact, age-related cognitive decline and dementia are the same thing. What you call it is a matter of degree, and it is primarily a product of our unhealthy diets and lifestyles.Maintaining a youthful brain does, however, require superior nutrition from both diet and high-quality supplements. A brain support program would include the B vitamins and the antioxidant vitamins A, C, D and E. Fish or flax oil is a must, and the need for it increases with age.By middle age, it's best to be supplementing with CoQ10, acetyl-L-carnitine, and multiple B vitamins. (Deficiencies in vitamin B12 are common and often misdiagnosed as dementias or…