There are chemicals in cosmetic and household products that can damage the nervous system, the cells and the genetic information contained in cells.
Proteins, fats and DNA in our bodies make up our cells. Cell damage can be caused by physical, chemical, infectious, biological, nutritional or immunological factors. Depending on the extent of the damage, it might be reversible or irreversible. The body will first try to repair the cell but if it is dead it will be replaced by another cell. This process becomes less efficient the older we get. Some researchers argue that if we want to live longer and reduce signs of aging, we should try to boost our natural defenses against cell damage and cell death.