On another list, a person wrote that HGer 's lifespan was only 20 or so
years. Can anyone comment on the lifespan of HGers?

I wrote:
>
> Man and woman ate this way for millions of years before agriculture. WHY do
> you have to have any carbs? Don't studies show that Hunter Gatherers ate a
> ketogenic diet and thrived--healthy bones, teeth, bodies, etc.
 So, what is the argument in favor of carbs?

And someone answered back:

............... pre our agricultural/grains/carb society >10,000
years ago, only had an average life span of about 20+/- years.  Who
knows what  diseases they may have developed had they lived to an
average age of 78?