Lavender
Also known as: Lavandula angustifolia, lavender essential oil, lavender aromatherapy, lavender tea
Effective Dosage
No established dose; inhalation sessions of 15 min used in studies; oral tea at 2 g twice daily in one trial
What the Science Says
Lavender is a flowering herb used in aromatherapy (inhaled as essential oil) or consumed as tea. Multiple clinical trials show it can meaningfully reduce anxiety, lower heart rate and cortisol levels, and improve sleep quality — particularly when inhaled before or during stressful procedures like surgery. Some evidence also suggests short-term blood pressure reductions in hypertensive adults after daily 15-minute inhalation sessions over one week.
What It Doesn't Do
Won't replace anxiety medication or treat clinical anxiety disorders. No human evidence it protects against Alzheimer's or multiple sclerosis — those are animal or cell studies only. Wound-healing benefits are from rat studies, not humans. The quail egg study has zero relevance to human health. Don't expect dramatic results from a single use.
Evidence-Based Benefits
Lavender has been shown to have calming effects, which can help reduce anxiety and improve sleep quality. Multiple systematic reviews and clinical trials support its efficacy in promoting relaxation and alleviating symptoms of stress.
Strong EvidenceEffective at: 80-160 mg daily
Source: auto-research
Absorption & Bioavailability
Unknown for oral forms; inhaled lavender compounds (linalool, linalyl acetate) are absorbed through the lungs and olfactory system, but pharmacokinetic data were not reported in the provided studies
Red Flags to Watch For
- Most anxiety studies combine lavender with other interventions (music, dim lighting) making it hard to isolate lavender's effect alone
- Many studies are small pilots or single-center trials — results may not generalize broadly
- The misophonia tea trial lacked participant blinding, raising significant placebo effect concerns
- Neuroprotective and immune claims are based entirely on animal and cell studies — no human evidence provided
- Essential oils are not regulated as drugs; product quality and concentration vary widely between brands
Products Containing Lavender
See how Lavender is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06