It’s thought that certain application methods can improve absorption, such as applying with heat or to different areas of the body. However, research in this area is lacking
Inhaling the aromas from essential oils can stimulate areas of your limbic system, which is a part of your brain that plays a role in emotions, behaviours, sense of smell, and long-term memory
The limbic system also plays a role in controlling several unconscious physiological functions, such as breathing, heart rate, and blood pressure. As such, some people claim that essential oils can exert a physical effect on your body.