The researchers analysed the results of five randomised controlled trials that investigated the ability of lavender oil oral capsules (Seremind) to reduce symptoms of anxiety.3
Symptoms of anxiety include difficulty sleeping, excessive worry, panic attacks and poor concentration.
Two studies investigated people with generalised anxiety disorder, one investigated people with mixed anxiety and depression, and the other investigated people with anxiety-related restlessness and subsyndromal anxiety.4-7
- Anxiety disorder: anxiety symptoms that are frequent, persistent (lasting for 6 months or more) and impact day-to-day life.
- Subsyndromal anxiety: a term used by the authors of the study to describe anxiety symptoms that do not meet the criteria for an anxiety disorder.
- Generalised anxiety disorder: a type of anxiety disorder where feelings of anxiety can be triggered by many different factors rather than from one specific cause.
Individually, all of the studies that were analysed had previously shown lavender oil oral capsules to reduce symptoms of anxiety more than a placebo (a ‘dummy’ medicine).
The researchers used a statistical test (called a meta-analysis) to help further investigate the effect of lavender oil oral capsules in these studies, to give a single overall result.