I've heard that oral contraceptives slow the metabolism of caffeine. Edit, tiny study: http://link.springer.com/article/10.1007/BF00544361 http://link.springer

I've heard that oral contraceptives slow the metabolism of caffeine. Edit, tiny study: http://link.springer.com/article/10.1007/BF00544361 http://link.springer.com/article/10.1007/BF00544361