The difference, in the same environment, between skin exposed to solar radiation and that protected from it is strikingly illustrated in cloistered nuns living in tropical countries. ... The damage to DNA is normally repaired by the natural processes of DNA repair and replication, but these are not ... Finally smoking (see Smoking), particularly cigarette smoking, seems to speed up the process of wrinkling.
|Title||:||Encyclopedia of Family Health: Typhoid and paratyphoid-Zest|