7. Cedarwood![](https://s41998.pcdn.co/wp-content/uploads/2016/12/Fotolia_168468885_Subscription_Monthly_M.jpg.optimal.jpg)
Cedarwood essential oil is a favorite of mine on account of it’s rich, earthy scent and calming effect on my mood. It is rich in sesquiterpenes, compounds which can positively affect the emotion centers of the brain. Research has even shown that sesquiterpenes could be an effective treatment for Alzheimer’s disease. For this reason, diffusing some cedarwood essential oil when you need to chill out or unwind before bed is an excellent idea.