title_body: French press vs instant coffee - health
upvoted_answer: As far as I know there are no health concerns about coffee aside from caffeine consumption. Unless there are additives in instant coffee that I'm unaware of then there ought to be no substantive difference between the two (French Press and instant).  Instant coffee is simply coffee which was freeze dried either by spraying droplets in the air or crushed after freezing.
  
  Therefore the health concerns, if any, would be relative to the amount of caffeine you consume. You mention that you drink two cups a day. That is below every recommended max consumption I've ever seen (4 cups).