Are Essential Oils Safe During Pregnancy? Which to Avoid and Which Are OK
Essential oils in pregnancy: which are safe and which to avoid? Learn which fragrance ingredients carry risk and how to read cosmetic labels.
What are essential oils and why are they worth treating more cautiously during pregnancy?
Essential oils are concentrated blends of volatile organic compounds extracted from plants — terpenes, phenols, aldehydes and other active components. In cosmetics they serve a fragrance function and sometimes a biologically active one too. Because of their low molecular weight, many components of essential oils penetrate the skin and can reach systemic circulation — and that is exactly what makes them potentially risky in pregnancy.
An important distinction: essential oils are not the same as plant-based body oils (e.g. argan, almond or jojoba oil). The latter are fatty acid esters — they have a completely different safety profile and are generally considered safe. You'll find more about the differences in our ingredient encyclopedia.
Which essential oils should be strictly avoided during pregnancy?
Some essential oils have documented uterotonic properties (stimulating uterine contractions), are hepatotoxic or are suspected of having a teratogenic effect. The high-risk group includes:
- Sage (Salvia officinalis) — contains thujone, a strong neurotoxin and uterotonic agent,
- Wormwood (Artemisia absinthium) — high concentrations of thujone,
- Rosemary (Rosmarinus officinalis) — at high concentrations it may stimulate contractions,
- Fennel (Foeniculum vulgare) — contains estragole, which is potentially genotoxic,
- Star anise (Illicium verum) — a profile similar to fennel,
- Camphor (Cinnamomum camphora) — stimulates the central nervous system and the uterus,
- Juniper (Juniperus communis) — a strong diuretic and uterotonic agent.
Which essential oils are generally regarded as safer during pregnancy?
When used at low concentrations in cosmetic products, the following are considered relatively safe:
- Lavender (Lavandula angustifolia) — at low cosmetic concentrations,
- Mandarin and sweet orange — low potential for systemic absorption,
- Lemon (Citrus limon) — requires avoiding sun exposure after application (photosensitisation),
- Roman chamomile (Anthemis nobilis) — at very low concentrations.
Keep in mind, however: even the safer essential oils should never be applied undiluted directly to the skin during pregnancy. In finished cosmetics, their concentration is regulated by EU Regulation 1223/2009 and the guidelines of IFRA (International Fragrance Association).
Essential oils in finished cosmetics — how to assess the risk?
In creams, lotions and leave-on products, essential oils usually make up less than 1% of the formula — far less than in aromatherapy. The SCCS regularly assesses individual fragrance ingredients for safety. Under EU Regulation 1223/2009, manufacturers are required to list 26 fragrance allergens on the label if their concentration exceeds the thresholds of 0.001% or 0.01%.
Want to check body oils and their composition? Visit our body oils category, where you can analyse every product ingredient by ingredient.
Aromatherapy during pregnancy — additional safety rules
Inhaling essential oils (diffusers, fragrance burners) is a different exposure than topical use. With inhalation, volatile substances go directly to the lungs and bloodstream, which can increase the risk. That is why aromatherapy during pregnancy calls for even greater caution:
- Avoid the oils on the high-risk list entirely.
- Keep sessions short (up to 30 minutes) in well-ventilated rooms.
- Do not use aromatherapy in the first trimester without consulting a doctor.
How to read a cosmetic's composition for essential oils?
On the label, look for the Latin INCI names: e.g. Lavandula Angustifolia Oil, Rosmarinus Officinalis Leaf Oil, Foeniculum Vulgare Fruit Oil. You can also check the composition in the PurScore.pl search engine — we automatically flag ingredients that require attention during pregnancy.
Note: This article is for informational purposes and does not replace medical advice. If you have any doubts about cosmetics during pregnancy, consult a gynaecologist or dermatologist.
FAQ
No. Some oils, at low cosmetic concentrations, are considered relatively safe. However, several oils (including sage, wormwood, camphor and juniper) have a uterotonic or teratogenic effect and should be avoided.
Lavender (Lavandula angustifolia) at low cosmetic concentrations is generally considered safe. In finished cosmetics the risk is much lower than with direct aromatherapy — especially in the first trimester.
Tea tree oil is not on the lists of strictly prohibited substances, but because of its skin penetration potential and the limited data on use during pregnancy, many dermatologists recommend caution — especially in the first trimester.
Essential oils are, for example, Lavandula Angustifolia Oil or Rosmarinus Officinalis Leaf Oil. Plant (carrier) oils are, for example, Argania Spinosa Kernel Oil or Prunus Amygdalus Dulcis Oil — these are generally safe during pregnancy.
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