We age because over the years the cells in our bodies begin to malfunction. This is the general view that scientists hold of the aging process. For example, in older people the cells' internal quality control breaks down.This control function usually eliminates proteins that have become unstable and lost their normal three-dimensional structure. These deformed proteins accumulate in the cells in a number of diseases, such as Parkinson's and Alzheimer's.
‘American scientists demonstrated that mice with accumulations in their nerve cells exhibit a more stable long-term memory.’