Are white people at a disadvantage in terms of evolution?

i am white so dont get me wrong, i heard that when people started moving north that there wasnt enough sun so there was no need for dark skin to protect against uv rays, and i heard that white people have evolved this way because they needed to conserve as much vitamin c as possible because they werent getting enough sun, are we at a disadvantage evolution wise? and are we the last people to evolve? is that a disadvantage?