Oregano Oil
Also known as carvacrol, oil of oregano, oregano extract, oregano oil
Key takeaways
- Carvacrol and its derivatives show antimicrobial activity against Mycobacterium spp. (PMID: 38390753)
- Dietary oregano oil can inhibit lipid oxidation in turkey meat during refrigerated storage (PMID: 14985183)
- Carvacrol demonstrates neuroprotective potential in models of Alzheimer's and Parkinson's diseases (PMID: 36567278)
What the research shows
AI-synthesized from 7 peer-reviewed sources · Updated 2025
Oil of Oregano, primarily through its active component carvacrol, is studied for its antimicrobial, neuroprotective, and antioxidant properties. Current research is heavily weighted toward preclinical, animal, and food-science models rather than human clinical trials.
By condition
Antimicrobial/Infection
Moderate
Systematic and narrative reviews indicate significant antimicrobial activity, specifically against Mycobacterium spp. and other pathogens.
Neuroprotection (Alzheimer's/Parkinson's)
Weak
Narrative reviews suggest potential neuroprotective mechanisms for carvacrol, though human evidence is lacking.
Food Preservation/Lipid Oxidation
Moderate
RCTs in animal models (pigs and turkeys) show it can inhibit lipid oxidation and improve meat characteristics.
Bone Healing
Insufficient
Preliminary research using nanoparticles suggests potential for bone healing in 3D printed scaffolds.
Effective doses
No human RCT dose ranges provided in the source material; studies focused on animal dietary supplementation and preclinical models.
Safety & interactions
No specific interactions or contraindications were provided in the source abstracts.
Limitations
The majority of evidence is derived from narrative reviews, preclinical studies, or animal models, with a critical lack of human randomized controlled trials.
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How it's sold
Data aggregated from 164 product labels
Research evidence
Showing top 10 of 7 sources, sorted by quality
**Simitzis et al., 2010** | Meat Sci | Rct Simitzis P E, Symeon G K, ... Deligeorgis S G. The effects of dietary oregano oil supplementation on pig meat characteristics. Meat Sci. 2010-Apr;84(4):670-6. doi:10.1016/j.meatsci.2009.11.001 The …
**Fermiano et al., 2024** | Future Med Chem | Systematic Review Fermiano Thiago H, Perez de Souza João V, ... Cardoso Rosilene Fressatti. Antimicrobial activity of carvacrol and its derivatives on Mycobacterium spp.: systematic review of pr…
**Govaris et al., 2004** | Int J Food Sci Nutr | Rct Govaris A, Botsoglou N, ... Ambrosiadis I. Dietary versus post-mortem use of oregano oil and/or alpha-tocopherol in turkeys to inhibit development of lipid oxidation in meat during refrig…
**Dahiya et al., 2024** | Small | Other Dahiya Aditi, Chaudhari Vishal Sharad, Bose Susmita. Bone Healing via Carvacrol and Curcumin Nanoparticle on 3D Printed Scaffolds. Small. 2024-Dec;20(50):e2405642. doi:10.1002/smll.202405642 Carvacrol…
**Javed et al., 2023** | Curr Neuropharmacol | Narrative Review Javed Hayate, Mohamed Fizur Nagoor Meeran, ... Ojha Shreesh. Neuroprotective Potential and Underlying Pharmacological Mechanism of Carvacrol for Alzheimer's and Parkinson's Dis…
**Sharifi-Rad et al., 2018** | Phytother Res | Narrative Review Sharifi-Rad Mehdi, Varoni Elena Maria, ... Sharifi-Rad Javad. Carvacrol and human health: A comprehensive review. Phytother Res. 2018-Sep;32(9):1675-1687. doi:10.1002/ptr.6103 …
**Nostro et al., 2012** | Recent Pat Antiinfect Drug Discov | Narrative Review Nostro Antonia, Papalia Teresa. Antimicrobial activity of carvacrol: current progress and future prospectives. Recent Pat Antiinfect Drug Discov. 2012-Apr;7(1):2…
Frequently asked questions
What is oil of oregano and what is it used for?
Oil of oregano is a supplement primarily studied for its antimicrobial, neuroprotective, and antioxidant properties, largely due to its active component, carvacrol. Current research is heavily weighted toward preclinical, animal, and food-science models rather than human clinical trials. It is not currently established as a proven treatment for specific human conditions.
Does oil of oregano work for infections?
There is moderate evidence suggesting significant antimicrobial activity against pathogens like Mycobacterium spp., based on systematic and narrative reviews. However, this evidence is derived from preclinical and animal studies, and there are no human clinical trials confirming its effectiveness for treating infections in people. You should consult a healthcare provider for infection treatment.
Can oil of oregano help with Alzheimer's or Parkinson's disease?
Evidence for neuroprotection in Alzheimer's and Parkinson's disease is weak, as it is based only on narrative reviews and animal models. Human evidence is currently lacking, so it is not considered an effective treatment for these conditions. Do not use this supplement to replace prescribed medications for neurological disorders.
What is the effective dose of oil of oregano for humans?
No effective human dose ranges have been provided in the source material, as studies have focused on animal dietary supplementation and preclinical models. Because human dosing data is absent, it is unsafe to assume a specific amount is effective or safe for consumers. Always consult a healthcare provider before starting any new supplement regimen.
Is oil of oregano safe to take?
While no specific interactions or contraindications were documented in the provided abstracts, the lack of human safety data means risks are not fully known. Pregnant women, individuals on medications, and those with bleeding disorders should avoid this supplement due to insufficient safety evidence. Consult a healthcare provider to assess personal safety risks.
Does oil of oregano interact with other drugs?
No drug interactions were documented in the provided evidence summary, but this does not guarantee safety for everyone. Because human clinical data is lacking, potential interactions with medications remain unknown. Individuals taking prescription drugs should consult a healthcare provider before use to avoid adverse effects.
Who should avoid taking oil of oregano?
Due to the lack of human clinical trials and safety data, pregnant women, breastfeeding mothers, and individuals on prescription medications should avoid this supplement. There is insufficient evidence to determine its safety for these vulnerable populations. Always seek professional medical advice before use.