“Unless you’ve inherited a rare genetic disorder or have been in an accident, everyone generally starts aging at a similar rate. By the time we hit our 30s, however, biologic function and performance has already started to decline for many. The rate of decline varies dramatically among individuals. While some people will lose a function as they age, others will show almost no decline at all. … Many assume that how a person ages is carved in ‘genetic stone.’ But studies continue to show that for most of us, lifestyle choices and behaviors have far more impact on longevity and health than our genes.” (10/07/08)