Well then we have Peppermint oil and this oil is really used to keep you awake plus is also used for oral hygiene and a study found that peppermint oil taken on a regular basis will increase your alertness by like 20-30% and some use this oil for like headaches plus peppermint oil can help with your digestive systems plus research does show that the oil can also help with IBF or irritable bowel syndrome what it does is help with the pain and a study that was done from the University of California San Diego found that peppermint oil capsules really helped to improve symptoms of irritable bowel syndrome,plus peppermint oil also may help with hair loss issues you see researchers found that the oil help with hair loss but this was done on animals more research is needed here.