title_body: Why does French press not give enough 'Caffeine Effect'?
upvoted_answer: One of the reasons I like my French Press is because of the caffeine boost. One simple answer to your question is to add more coffee grounds.
  
  But aside from the type and amount of coffee used there are several things that will influence the caffeine level of your coffee. One of them is the size of the ground. You need a ground big enough that it is filtered out but not so big that the water doesn't completely extract the oils and caffeine.
  
  You might try different grind levels and see which one works best.
  
  Another thing you can do is increase steep time. If your grinds are just a bit too large perhaps a 6 minute steep would work better.
  
  You will have to experiment with the grind and steep time.