Ingredient
Origanum Vulgare Oil
Origanum Vulgare Oil is flagged for pregnancy, breastfeeding, trying to conceive, general use, postpartum and PCOS. The concern behind the strongest flag is absorbed into the body and hormone disruptor.
- Oregano Oil
- Wild Marjoram Oil
- Oregano Essential Oil
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Not Recommended
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 6 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 4 of 5
- Higher means more likely to sting or redden
Origanum Vulgare Oil and pregnancy
Not Recommended
- Absorbed into the body
- Hormone disruptor
Origanum vulgare oil (oregano oil) is a concentrated essential oil high in carvacrol and thymol. These phenolic compounds are potent and can penetrate the skin barrier, leading to systemic absorption. According to aromatherapy safety guidelines and many healthcare providers, oregano oil should be avoided during pregnancy due to its emmenagogue properties (ability to stimulate menstruation) and potential to affect uterine muscle tone. High doses of oregano oil have been shown to have anti-implantation effects in animal studies. The concentrated phenols can also be hepatotoxic with excessive exposure. Most aromatherapists and obstetricians recommend avoiding oregano essential oil during pregnancy, especially in the first trimester. The National Association for Holistic Aromatherapy (NAHA) lists oregano oil among essential oils to avoid during pregnancy due to potential uterine stimulation and other safety concerns.
Origanum Vulgare Oil and breastfeeding
Not Recommended
- Passes into breast milk
- Infant exposure
Origanum vulgare oil contains high concentrations of carvacrol and thymol, which are fat-soluble phenolic compounds. These constituents can be absorbed through the skin and may transfer to breast milk. While specific studies on oregano oil transfer to breast milk are limited, the essential oil's potent irritant properties and potential for infant exposure make it a concern. Infants have immature metabolic systems and may be unable to efficiently process the phenolic compounds. Exposure through maternal skin or breast milk could cause irritation or adverse reactions in breastfed infants. Most lactation consultants and aromatherapy experts recommend avoiding potent essential oils like oregano during breastfeeding. If used, it should never be applied near the breast area and should be used with extreme caution and dilution elsewhere.
Origanum Vulgare Oil and postpartum
Caution Advised
- Irritant
During the postpartum period, skin may be more sensitive and vulnerable to irritation. Origanum vulgare oil is a highly potent irritant that can cause burning, redness, and allergic reactions even when diluted. While the hormonal concerns associated with pregnancy may not apply to non-breastfeeding postpartum women, the severe irritation potential remains. Postpartum skin changes may increase susceptibility to adverse reactions from this strong essential oil.
Origanum Vulgare Oil and trying to conceive
Not Recommended
- Hormone disruptor
- Fertility effects
Origanum vulgare oil should be avoided by women trying to conceive due to its emmenagogue properties and potential effects on reproductive hormones. Animal studies have shown anti-implantation effects at high doses. While topical cosmetic use involves lower exposure than oral supplementation, the precautionary principle suggests avoiding oregano oil when actively trying to conceive, particularly since safer alternatives exist.
Origanum Vulgare Oil and PCOS
Caution Advised
- Irritant
- Interferes with hormones
Origanum vulgare oil has antimicrobial properties that some claim could benefit acne-prone skin associated with PCOS. However, the oil is extremely irritating and can damage the skin barrier, potentially worsening inflammation. Some preliminary research suggests oregano oil may have effects on hormone metabolism, though evidence is limited and inconsistent. Given that PCOS involves hormonal imbalance, the use of potent essential oils with potential hormonal effects should be approached cautiously. The significant irritation and sensitization risk of oregano oil generally outweighs any potential benefits for PCOS-related skin concerns. Gentler, evidence-based treatments are preferable for managing PCOS skin symptoms.
Origanum Vulgare Oil and general use
Not Recommended
- Irritant
- Common allergen
- Increases sun sensitivity
Origanum vulgare oil is one of the most irritating essential oils used in cosmetics. Its high phenol content (especially carvacrol and thymol) can cause severe skin irritation, burning, redness, and allergic contact dermatitis. Even heavily diluted formulations can trigger reactions in sensitive individuals. The International Fragrance Association (IFRA) imposes strict limits on oregano oil use due to its sensitization potential. Repeated exposure increases the risk of developing allergic reactions. The oil can also cause photosensitivity, making skin more vulnerable to sun damage. While oregano oil has antimicrobial properties, its use in skincare is generally not recommended by dermatologists due to the high risk of adverse effects. Much safer and better-tolerated ingredients are available for similar purposes.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of Origanum Vulgare Oil, each one with its own page here.
Ingredients that raise the same concerns.
Where this came from
Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. These assessments have not been reviewed by a clinician, and nothing here is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.
Assessment last pulled from the ingredient database on .
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