One of the arguments for organic food is that
many of the natural vitamins and minerals that
should be found in our food no longer are,
partly because of herbicides and pesticides
used to grow food these days and partly because
of a change in farming practices where farmers
no longer rotate their crops and leave land to
regenerate for years. Because of this, someone
might have a perfectly balanced diet but still
find a deficiency show up on a blood test.
For that reason, I do supplement my diet when
I am not eating organic food.