| What does research show about agarwood's calming effects? A 2025 study published in the journal Pharmaceuticals (MDPI) found that agarwood essential oil produced measurable antidepressant-like effects in a mouse model of inflammation-induced depression. Mice given agarwood oil (by inhalation or injection) showed significantly improved behaviour in standard depression-testing protocols, alongside reduced brain inflammation markers (IL-1β, IL-6, TNF-α) and activation of a neuroprotective signalling pathway (BDNF/TrkB/CREB) in the hippocampus — the brain region central to mood regulation and memory. Notably, the study found that agarwood oil extracted by traditional hydrodistillation (steam distillation) was more effective than oil extracted using supercritical CO2 methods. This is preclinical (animal) research — human clinical trials are still in early stages. |
For centuries, agarwood — known as oud — has been valued across Asian and Middle Eastern traditions for its calming, mood-lifting properties.
But what does modern scientific research actually say about this traditional belief?
In the past few years, researchers have begun investigating agarwood's effects on mood and anxiety using rigorous laboratory methods — and the early findings are genuinely interesting.
This article summarises what current research studies show about agarwood's calming and mood-regulating properties — translating the technical findings of recent scientific publications into accessible language, while being clear about what is and is not yet established.
We write as Global Essential Oil, an Indonesian manufacturer of Aquilaria agarwood oil.
The 2025 Pharmaceuticals Study: Agarwood and Depression-Like Behaviour
The most significant recent research on agarwood's mood effects is a February 2025 study published in the peer-reviewed journal Pharmaceuticals (led by researcher Jianhe Wei), titled "Antidepressant Activity of Agarwood Essential Oil: A Mechanistic Study on Inflammatory and Neuroprotective Signaling Pathways."
This study moved beyond simply observing that agarwood "feels calming" — it investigated the specific biological mechanisms that might explain why.
How the Study Was Designed
Researchers used a well-established laboratory model of inflammation-induced depression in mice: administering lipopolysaccharide (LPS) — a compound that triggers an inflammatory immune response known to produce depression-like behaviour in animal models, used because inflammation is increasingly recognised as a contributing factor in human depression as well.
The mice then received agarwood essential oil (AEO) either by inhalation (aromatherapy-style exposure) or injection, and their behaviour was assessed using three standard tests:
- Open-field test: Measures general activity and exploratory behaviour — reduced movement is associated with depression-like states
- Tail suspension test: Measures how quickly mice stop struggling when briefly suspended — longer immobility time is interpreted as a depression-like behaviour
- Forced swimming test: Similar principle — measures the duration of active swimming versus passive floating
What the Study Found
The results were notable: agarwood essential oil significantly improved depression-like symptoms in the treated mice — reducing immobility time in both the tail suspension and forced swimming tests, indicating the mice were behaving more like non-depressed control animals.
This effect was observed with both inhalation and injection administration
The Mechanism: What’s Actually Happening in the Brain
| How does agarwood oil affect the brain, according to the mechanism study? The 2025 study identified two connected biological mechanisms: 1. Reducing brain inflammation: Agarwood oil reduced levels of three inflammatory signalling molecules (IL-1β, IL-6, and TNF-α) and inhibited the NF-κB/IκB-α pathway — a cellular signalling system that, when overactive, drives inflammation. Lower inflammation in the brain is associated with improved mood regulation. 2. Activating a neuroprotective pathway: Agarwood oil activated the BDNF/TrkB/CREB signalling pathway in the hippocampus — the brain region central to memory and mood. BDNF (Brain-Derived Neurotrophic Factor) supports the growth and survival of neurons; this pathway is also the target of many conventional antidepressant medications, giving the finding particular scientific relevance. |
In plain terms: the study suggests agarwood oil may work through two complementary routes — calming down inflammatory processes that contribute to depressive states, while simultaneously supporting a brain signalling pathway associated with resilience and neuronal health.
This dual mechanism is similar in concept (though not necessarily in strength) to how some conventional antidepressants are understood to work.
A Notable Finding: Extraction Method Affects Effectiveness
One of the most practically relevant findings from the 2025 study — particularly for anyone sourcing or using agarwood oil — is that how the oil is extracted appears to affect its calming/antidepressant effectiveness.
The researchers specifically compared:
| Extraction Method | Effectiveness in Study | Relevance |
| Hydrodistillation (traditional steam distillation) | More effective at alleviating LPS-induced depressive-like behaviours | Traditional method used in Indonesian and most commercial agarwood oil production |
| Supercritical CO2 fluid extraction | Less effective in this comparison | Newer, high-tech extraction method, less commonly used commercially for agarwood |
This finding is significant because it suggests that the traditional steam distillation method — the same method used in Indonesian agarwood oil production for centuries, and still the standard commercial approach today — may actually preserve or generate the specific compound profile responsible for the calming effects more effectively than newer extraction technologies.
For the complete explanation of how this distillation process works, see: What Is the Oudh Distillation Process — How Oud Oil Is Extracted.
Broader Scientific Context: Agarwood and the Nervous System
The 2025 study builds on a growing body of research into agarwood's effects on the nervous system. Earlier and parallel research has investigated:
Anxiolytic (Anxiety-Reducing) Properties
Separate research has examined agarwood's effects specifically on anxiety-related behaviour, with studies proposing that sesquiterpene compounds — particularly agarospirol — interact with GABAergic signalling pathways, the same neurotransmitter system targeted by pharmaceutical anti-anxiety medications, though at much lower potency.
This complements the antidepressant findings, since anxiety and depression frequently co-occur and share overlapping neurobiological mechanisms.
Why Inhalation Matters Mechanistically
The fact that the 2025 study found inhalation alone (not just injection) produced meaningful effects is mechanistically important — it supports the plausibility of traditional and contemporary aromatherapy use, where agarwood oil is diffused or inhaled rather than injected or ingested.
This aligns with the olfactory-limbic pathway — the direct neural connection between the sense of smell and the brain's emotional processing centres — which provides a structural explanation for how an inhaled aroma could plausibly influence brain inflammatory and neuroprotective signalling.
What This Research Does and Does Not Establish
| Important limitations to understand This research is genuinely promising but preclinical — conducted in mice, not humans. Important context: (1) animal models of depression, while scientifically standard, do not perfectly replicate human depression; (2) the study used controlled laboratory doses and administration methods that may not directly translate to typical home aromatherapy use; (3) robust human clinical trials are still needed before any therapeutic claims can be considered established. This research should be understood as scientifically meaningful early-stage evidence, not as proof that agarwood oil treats clinical depression or anxiety in humans. Anyone experiencing mood or anxiety concerns should consult a healthcare professional rather than relying on aromatherapy as a substitute for appropriate care. |
Using Agarwood Oil for Calming and Mood Support
Based on both traditional use and the mechanistic plausibility supported by current research, here is how agarwood oil is commonly used for calming and mood support:
- Diffusion: 1–2 drops in a cold diffuser for 15–20 minutes — the heavy, complex aroma of genuine agarwood oil fills a space quickly and persists
- Personal inhaler: 2–3 drops on an inhaler wick for targeted, personal use throughout the day
- Diluted topical application: 0.5–1% in a carrier oil applied to pulse points — combines aromatic exposure with skin-level absorption
- Meditation support: 1 drop diffused before meditation practice to support the grounding, calming environment
For complete application guidance, dilution ratios, and safety information, see: Agarwood Essential Oil Benefits: 10 Proven Uses for Skin, Mind & Wellbeing and Agarwood Oil Benefits for Aromatherapy — Complete Guide.
Indonesian Agarwood Oil: Produced by Traditional Hydrodistillation
Given the 2025 research finding that hydrodistillation produces more effective agarwood oil than CO2 extraction, it is worth noting that traditional steam/hydrodistillation remains the standard production method for Indonesian agarwood oil — including at Global Essential Oil, where our Aquilaria agarwood oil and Aetoxylon agarwood oil from Kalimantan are produced using this time-tested extraction method, with batch-specific COA and GCMS documentation confirming compound profile.
Related Reading
→ Agarwood Essential Oil Benefits: 10 Proven Uses for Skin, Mind & Wellbeing
→ Agarwood Oil Benefits for Aromatherapy — Anxiety, Sleep & Meditation Guide
| Request Indonesian Agarwood Oil Sample Contact Global Essential Oil to request a hydrodistilled Aquilaria or Aetoxylon agarwood oil sample with batch-specific COA and GCMS documentation. We respond within 1 business day. → Contact Global Essential Oil — Request Agarwood Oil Sample |
Frequently Asked Questions
Is there scientific evidence that agarwood may help reduce stress?
Yes. Several preclinical studies suggest agarwood may have calming and mood-supporting properties. Research has shown anti-inflammatory and neuroprotective effects linked to stress and mood regulation. However, human clinical evidence remains limited, so these findings should be considered preliminary.
How might agarwood support mood and relaxation?
Research suggests agarwood may help regulate inflammatory pathways and support brain signaling involved in mood and emotional balance. These mechanisms may help explain its long-standing use in traditional wellness and aromatherapy practices.
Does the extraction method affect agarwood oil quality?
Yes. Studies indicate that different extraction methods can produce different chemical profiles. Traditional steam-distilled agarwood oil may preserve compounds associated with its calming aroma, while other extraction methods can result in a different composition.
Has agarwood been studied in humans?
Human research on agarwood's effects on mood and stress is still limited. Most available evidence comes from laboratory and animal studies. More clinical trials are needed to confirm its effectiveness in humans.
Can agarwood oil replace anxiety or depression medication?
No. Agarwood oil should not be used as a substitute for professional medical treatment. While research findings are promising, they do not establish agarwood as a treatment for anxiety or depression. Always consult a healthcare professional for medical concerns.
What is the best way to use agarwood oil?
Aromatherapy diffusion is the most common and practical method. Add 1–2 drops to a diffuser and use in a well-ventilated space. For more application tips, see our guide on agarwood essential oil benefits.
