It's not just what you eat or how much, it's also how much
exercise you get.  You must exercise to be healthy.  You
must include aerobic exercise like walking to be heart
healthy.  The current Surgeon General recommendation for
exercise is 30-60 minutes of moderate exercise every day.

With that, good health requires moderate portions of a
wide variety of high fiber, low fat food.  The problem with
a macrobiotic diet, if I understand it, is that you risk
iron deficiency anemia and pernicious anemia because the
human body absorbs iron and vitamin B12 best from animal
foods and the macrobiotic diet does not allow them.  If you
are considering it because you think it is more natural,
then you will have anemia because you will also avoid food
that is enriched with these nutrients, and you will also avoid
taking supplements.  

So are you looking for good health?  Then do reasonable things
and not extreme things.