Why do older people forget things more frequently than younger people?

It's called age. As we get older, all parts of our bodies weaken, including memory. Plus there is what is called, 'Alzheimer's disease'. Every part of a human body weakens and dies, the memory part of the brain is a part that goes fast in some. It's called life!

When a human is born his brain is "empty" and is continously filled with a lot of information. By experiencing and repeating things synapses connect to specific brain regions. The more information of one kind is coming to the brain more and more synapses will be connected. Slowly the Brain is getting a specialist for certain tasks. That's for example the reason why People who play the Piano since they were Children are better in playing than people who startet later.

Most People are constantly giving order to their lifes and many days are just like the day before. So the Brain is specializing every day a bit more and not capable of processing any new information coming towards it.

Persons who suffer from 'Alzheimers disease' mostly forget what they did only minutes ago or in bad cases Years while they can perfectly remember what they did when they were young.

However you can protect your brain by altering your everyday life.