I am very happy with my purchase of  Peppermint Essential Oil from New York Biology. I have really bad sinus issues from the time spring starts until winter comes.  I use Peppermint oil in a diffuser to help relieve my nasal passages.  It really helps me get a good night sleep, I don't have to deal with waking up from not being able to breath.  I also occassionally will put this in my bathroom when showering or bathing and let the steam and peppermint oil do it's job there.  Peppermint oil can also help with stomach aches, bad breath and does a great job with headaches.  I love trying to remedy issues with oils instead of putting a lot of medication in my system. This oil is 100%natural and it's not tested on animals.  It comes in a dark amber bottle to prolong the effectiveness.  I received this item in exchange for my honest, unbiased review.