Can memory loss be reversible or even preventable?

It's not Alzheimers Disease. It's just age-related memory loss.

About 40 percent of Americans age 85 and older say they experience some memory loss, a 2009 survey by the Pew Research Center found, as did 27 percent of those 75 to 84 and 20 percent of those ages 65 to 74.

Researchers have pinpointed a brain molecule responsible. Now for the remedies.