From an evolutionary standpoint does Neanderthal man prove environment effects us directly?

This seems true as us sapiens probably became us from a good mix of protein fruit and vitamin d rich sun from our environment not to mention fish. Neanderthals were strictly protein and gr eaters lived in a bleak environment with no sun it was cold and was far away from the equator vitamin d Synthesis never occurred as much hindering them to stay the way the adapted any comments?