rituals
Bath Oils in Australia: What to Use, and How to Dilute It
Bath oils in Australia: a carrier plus a little essential oil. Why neat oil in water is the common mistake, which carriers work, and how much.
By Faten Sweeti
16 September 2026
7 min read
A bath oil is two things: a carrier oil that makes up almost all of it, and a small percentage of essential oil for scent. Around one to two per cent essential oil in a carrier is the usual range for body use, and the carrier is doing most of the work.
The mistake worth avoiding first, because it is the common one and it is a skin problem rather than a preference: do not drop neat essential oil into bathwater.
Why neat essential oil in a bath does not work
Oil and water do not mix. An essential oil dropped into a full bath does not dilute into 150 litres of water — it spreads across the surface as a film a few molecules thick and stays there.
When you get in, that film contacts skin at close to full strength. The dose is not the drop divided by the bath; it is whatever your skin passes through on the way in.
This matters more with some oils than others. Peppermint and the citrus oils are the ones people notice, usually somewhere they would rather not. But the principle holds for all of them, and the fix is the same: the oil has to be carried into the water by something.
Three things work:
- A carrier oil — jojoba, macadamia, a fractionated coconut. Blend first, then add.
- A bath salt or soak, where the essential oil is already distributed through a mineral base at a formulated concentration.
- A dispersant such as full-fat milk or an emulsifier, which is the traditional workaround and works better than nothing.
Not water. Not "swirling it in".
Choosing a carrier
Carrier oils differ in ways that show up on skin. Three are worth knowing because they do genuinely different jobs, and all three are already in our formulations.
| Carrier | What it is | On skin | Keeps |
|---|---|---|---|
| Jojoba (Simmondsia chinensis) | Not a fat at all — a liquid wax ester[^1] | Light, absorbs quickly, low residue | Very well; resists rancidity |
| Macadamia (Macadamia integrifolia) | A true oil, unusually high in palmitoleic acid[^2] | Richer, more cushioned | Moderately; keep it cool |
| Fractionated coconut (caprylic/capric triglyceride) | The lighter fractions of coconut oil | Very light, almost dry, no scent of its own | Extremely well |
Jojoba's oddity is worth a sentence. It is chemically a wax ester rather than a triglyceride, which is why it feels light for something that occlusive, and why it does not go rancid the way seed oils do.1
Macadamia's palmitoleic acid content is the highest of the common cosmetic oils.2 Practically, that reads as a richer, slower-absorbing feel — better for dry skin in winter, heavier than some people want in summer.
You will find jojoba and macadamia together in the Nourishing Body Scrub, and macadamia with fractionated coconut in the Renewal Body Scrub. A scrub is a carrier oil with abrasive in it, which is why a good one leaves skin conditioned rather than stripped.
How much essential oil
Less than most recipes online suggest.
For body use in a carrier: one to two per cent. In practical terms, 6 to 12 drops of essential oil in 30 mL of carrier. Start at the bottom of that.
For a bath: blend that carrier mixture first, then add a tablespoon or two to the water. You are not trying to scent the bath; you are trying to scent the few square metres of skin that pass through the surface.
For anyone with reactive skin, or during pregnancy: lower again, or not at all. The Nature & Calm line is essential-oil-free for exactly this reason, and Body Scrub for Sensitive Skin covers why fragrance is usually the variable that matters.
The International Fragrance Association publishes use-level standards per material and per product type, and they are the reference the industry actually formulates against.3 Several essential oil constituents — limonene and linalool among the best known — are recognised contact allergens that the European Union requires to be declared individually on a cosmetic label.4 Both oxidise as an oil ages in air, and the oxidation products carry most of the allergenic potential, which is the real argument for buying small bottles and using them.
What we sell, and what we do not
We do not make a pre-blended bath oil. What we make is 100% pure single-botanical essential oils, steam-distilled or cold-pressed, undiluted — and mineral soaks that already carry oils at a formulated concentration.
That is a deliberate split rather than a gap. A pure oil is the flexible option: you choose the carrier, the concentration and what to blend it with. A soak is the convenient one: the formulation work is done.
| Our oil | Botanical | Extraction | Origin |
|---|---|---|---|
| Lavender | Lavandula angustifolia | Steam distilled, flowers | Tasmania |
| Eucalyptus | Eucalyptus radiata | Steam distilled, fresh leaves | Australia |
| Lemon | Citrus limon | Cold-pressed, fresh rind | Australia |
| Peppermint | Mentha piperita | Steam-distilled, aerial parts, certified organic | Australia |
| Rosemary | Rosmarinus officinalis | Steam distilled, leaves | Australia |
"100% Pure" is stated with the extraction method because that is the specification. Single botanical, no additives, no synthetics, no dilution.
The five pure oils
HARMONY
Lavender Essential Oil
Deep, pure lavender — true-to-flower and profoundly calming
A$32
Net 15mL
OUTBACK BOTANICA
Eucalyptus Essential Oil
Clean, penetrating eucalyptus — the Australian bush distilled
A$26
Net 15mL
AURORA LUXE
Lemon Essential Oil
Pure cold-pressed citrus — clean and immediately uplifting
A$24
Net 15mL
Peppermint Essential Oil
Intense cooling peppermint — immediate and unmistakable
A$28
Net 15mL
Rosemary Essential Oil
Crisp, herbaceous rosemary — green and stimulating
A$28
Net 15mL
Which one, and when
Scent is the whole point, so this is preference rather than pharmacology. What follows is about character.
Evening. Lavender. True lavender — Lavandula angustifolia, not lavandin — is softer and less camphoraceous. The evidence that it improves sleep is weaker than the category suggests, and Essential Oils for Sleep goes through what the trials actually show. It is still the one most people reach for at night, and a long warm bath before bed is a settling ritual on its own terms.
Morning. Lemon or peppermint. Both are sharp and cold-reading. Citrus oils can increase sensitivity to sunlight for some people; if you are bathing in the morning and going straight out, keep them low.
After effort. Eucalyptus, which is what the Rejuvenating Soak is built around, with kunzea and peppermint under it.
Working, or concentrating. Rosemary. Herbaceous and dry rather than sweet.
General information, not medical advice. If you have a diagnosed skin condition or are pregnant, speak to your GP, dermatologist or midwife.
Frequently asked questions
The useful question is which carrier and which scent, because almost all of a bath oil is carrier. Jojoba is light and keeps well; macadamia is richer; fractionated coconut is the lightest and most neutral. Then one to two per cent of an essential oil you actually like.
No. It does not disperse — it floats as a surface film and reaches skin undiluted. Blend it into a carrier first, or use a soak formulated with it.
Dilute rather than count into the water. Six to twelve drops per 30 mL of carrier oil, then a tablespoon or two of that blend into the bath.
A bath oil is carrier plus essential oil and sits on the water. A soak is a mineral base — magnesium flakes, sea salt, clay — with oils distributed through it, so it dissolves and disperses.
Many essential oils are not recommended and advice varies by trimester — check with your midwife or GP. A plain carrier oil with no essential oil, or an essential-oil-free product, avoids the question entirely.
Yes. Any oil will. Get in and out carefully, and rinse the tub afterwards.
Sources
Every factual claim above is referenced below. Where the evidence is limited, the article says so rather than overstating it.
- 1.Pazyar N, Yaghoobi R, Ghassemi MR, Kazerouni A, Rafeie E, Jamshydian N. "Jojoba in dermatology: a succinct review." Giornale Italiano di Dermatologia e Venereologia 2013;148(6):687–691.
- 2.Kaijser A, Dutta P, Savage G. "Oxidative stability and lipid composition of macadamia nuts grown in New Zealand." Food Chemistry 2000;71(1):67–70.
- 3.International Fragrance Association. IFRA Standards Library.
- 4.European Commission. Regulation (EC) No 1223/2009 on cosmetic products, Annex III — fragrance substances requiring individual labelling, as amended by Commission Regulation (EU) 2023/1545.
