Even if you’re new to essential oils, there may be products in your home that contain lavender oil. Many people enjoy lavender’s soothing scent and pretty purple hue, but our ancestors have been using it for medicinal purposes for over 3,000 years—and for good reason. “As many would attest, lavender is a calming scent, which can be useful in treating migraines, emotional stress, and even depression,” says Dr. Milosavljevic. One studypublished in the International Journal of Psychiatry in Clinical Practice found that, in addition to alleviating symptoms of depression, taking 80 mg capsules of lavender daily has the potential to reduce anxiety and promote restful sleep. “It has a well-studied impact on the autonomic nervous system, which is why it serves as a natural treatment for insomnia that goes back generations,” adds Dr. Milosavljevic. She recommends placing a few drops on your pillow for best results.