Why are some 75-year-olds downright spry while others can barely get around? Part of the explanation, say researchers is differences from one person to the next in exposure to harmful substances in the environment, chemicals such as benzene, cigarette smoke, and even stress.
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/U...
Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/U...