I love this post, I just want to bump it again. I wonder what benefited US as regards loosing the gene to synthesize v it C.A random mutation that our ancestor gradually lost, was it just because it ate enough fruit That it just wasn't an issue...or enough insects that contained v it c ? Or was there another benefit to those that didn't have the gene?
Perhaps they were more driven to collect and store fruit in times of plenty for months when there wasn't much around and during a famine those with the gene died out.
I know during my pregnancies I was a fiend for getting v it C, oranges in particular.I wonder if pregnant mothers without the gene were more aggressive, or rarther assertive, in collecting their share?
Anyway it's fascinating to speculate!
Thank you Cofty for all your hard work!