Some people believe that applying lavender oil will make you less stressed by causing the brain to release serotonin. To test this, scientists set up an experiment with three groups. The first
reported their stress levels on a scale of 1-10 at the beginning and ending of a two hour period.
At the beginning of the two hour period, they applied simple water droplets to themselves. The
second and third groups reported their stress levels at the beginning and ending of the same
two hour period, but applied two different amounts of lavender oil to themselves at the
beginning of the two hours.