ingredients
Macadamia Oil for Skin: What It Is and Isn't
Macadamia oil for skin: light, stable, rich in oleic and palmitoleic acid. Where it shines, the sebum claim it doesn't earn, and how we use it.
By Faten Sweeti
27 October 2026
7 min read
Macadamia oil is a light, pale oil pressed from the kernel of an Australian rainforest nut. It is mostly oleic acid, with an unusually high share of palmitoleic acid, which gives it a silky feel and good stability. On skin, it softens and conditions without heaviness — which is why it works so well in body scrubs and bath oils.
What it is not is a copy of your skin's own oil. That claim is repeated almost everywhere macadamia is sold, and it comes from a mix-up between two closely related fatty acids. The real reasons to use it are good enough on their own, and they are the ones worth knowing.
Where macadamia comes from
Macadamia is Australian. The genus has four species, all native to Australia, and two of them — Macadamia integrifolia and Macadamia tetraphylla — are the parents of the domesticated nut now grown around the world.1 They are rainforest trees of south-east Queensland and northern New South Wales, and the nut was a food of the Aboriginal peoples of that country long before it was a crop. We acknowledge that custodianship — and do not claim any aspect of it.
The macadamia oil in our scrubs is cold-pressed, from nuts grown in subtropical Queensland.
It sits alongside the other native ingredients in our range in Australian Native Skincare Ingredients: The Complete Guide, and has its own entry at Macadamia Oil.
What is in macadamia oil
Almost all of it is fat, and the profile is what sets it apart from most other plant oils:
| Component | Share of fatty acids | Why it matters on skin |
|---|---|---|
| Oleic acid (omega-9) | Roughly 62–66% | The main body of the oil; rich and softening |
| Palmitoleic acid (omega-7) | Roughly 13–18% | Unusually high — few common plant oils carry more than a trace. Contributes to the light, slippery feel |
| Saturated fats (palmitic, stearic) | Most of the remainder | Body and stability |
| Polyunsaturated fats (linoleic) | Low | Why the oil keeps well |
| Minor components — tocopherols, tocotrienols, squalene, plant sterols | Small amounts | Antioxidant compounds that also help the oil resist going rancid |
The figures come from an analysis of fifteen cultivars, which found oleic acid at 61.7–66.5% and palmitoleic at 13.2–17.6%, with polyphenols, tocotrienols and squalene varying by variety.2 Comparisons with other nuts find the same pattern: oleic acid dominant, and palmitoleic present in macadamia at levels the others do not reach.3
That low polyunsaturated share is a practical advantage. Polyunsaturated oils oxidise readily; an oil built mostly of monounsaturated fat is more stable on the shelf and in the jar.
The sebum claim, and why it does not hold
You will read that macadamia oil "mimics the skin's natural sebum" because both contain palmitoleic acid. It is a tidy story, and it is not quite true.
Human sebum does contain a sixteen-carbon monounsaturated fatty acid in quantity — but it is a different one. Palmitoleic acid has its double bond at the ninth carbon. The fatty acid human skin is distinctive for, sapienic acid, has it at the sixth.4 They share a formula and differ in structure, and the difference is not trivial: sapienic acid is produced by human skin and essentially nowhere else, while palmitoleic acid is the version most other mammals make.4 When forensic chemists analysed the fatty acids in human fingerprint residue — sebum, more or less — the sixteen-carbon one they found was sapienic acid, not palmitoleic.5
So macadamia oil does not replace or replicate sebum. What is true is more modest and still useful: it is a light, well-tolerated oil that spreads easily and leaves skin feeling soft, and it is high in a fatty acid most plant oils barely contain.
We would rather sell it for what it is.
What macadamia oil does for skin
In the register of how skin looks and feels — which is the honest register for any cosmetic oil:
- It softens and conditions. The oleic acid gives it richness; skin feels smooth and supple rather than tight.
- It is light for a rich oil. Macadamia spreads easily and absorbs without the heavy, sitting-on-top feel of thicker oils, which is why it suits a body scrub that has to rinse cleanly.
- It keeps well. Low in polyunsaturated fat and carrying its own antioxidants, it resists turning rancid better than many carrier oils.2
- It carries other things well. As a base, it holds essential oils and fine exfoliants evenly — the same reason it is a good carrier for a homemade bath oil, covered in Bath Oils in Australia.
Macadamia oil vs jojoba
The two are often paired, and they are not the same kind of thing. Jojoba is technically a liquid wax rather than an oil — a different molecular structure, drier in feel and very stable.7 Macadamia is a true triglyceride oil, richer and more cushioning. Used together, as in several of our scrubs, jojoba keeps the finish light and macadamia gives it body.
How we use macadamia in the range
Macadamia appears in two forms in our scrubs — as oil, and as finely milled shell — and they do opposite jobs.
Macadamia in the range
OUTBACK BOTANICA
Renewal Body Scrub
Earthy wattleseed, cooling eucalyptus, and native kunzea over macadamia oil
A$45
Net 330g · ~10 uses
HARMONY
Nourishing Body Scrub
Delicate native floral and warm wattleseed over golden jojoba
A$48
Net 330g · ~10 uses
AURORA LUXE
Energising Body Scrub
Bright lemon myrtle lifted by botanical warmth
A$38
Net 330g · ~10 uses
As oil — the conditioning layer.
- Renewal Body Scrub binds Australian sea salt and fine Wattleseed in cold-pressed macadamia oil, with green clay. A firm scrub that leaves skin conditioned rather than stripped.
- Nourishing Body Scrub pairs macadamia with jojoba and colloidal oatmeal in a sea-salt base cushioned by Pink Clay — rich enough to rest on damp skin for ninety seconds as a brief mask before working in.
As shell — the exfoliant.
- Energising Body Scrub uses crushed macadamia shell, milled to a fine powder, alongside sea salt. Nut-shell exfoliants have a reputation for harshness, but that comes from coarse, irregular fragments; milled fine, the same material gives a softer, more controlled polish. Grind, not material, is the variable. More on it at Crushed Macadamia Shell.
How the oil-and-grain pairing works in a Wattleseed scrub is in Wattleseed: The Complete Guide.
A note on nut allergies
Macadamia is a tree nut.6 If you have a tree-nut allergy, check with your doctor or allergist before using any product containing macadamia oil or shell. If you are not allergic but are trying a new product, a patch test on the inner arm is a sensible first step.
General information, not medical advice. If you have a nut allergy or a diagnosed skin condition, speak to your doctor before using a new skincare product.
Frequently asked questions
Yes, for softening and conditioning. It is light for a rich oil, spreads easily, and leaves skin feeling smooth without heaviness. It is also stable on the shelf because it is low in polyunsaturated fat.2
A high share of oleic and palmitoleic acid, low polyunsaturated fat for stability, and small amounts of antioxidants such as tocotrienols and squalene.2 On skin, that adds up to a light, conditioning oil that suits body care.
Yes. All four macadamia species are native to Australia, and the cultivated nut descends from two of them.1 It is a traditional food of the Aboriginal peoples of south-east Queensland and northern New South Wales.
Different, rather than better. Jojoba is a liquid wax, light and very stable; macadamia is a richer triglyceride oil. Together they give a finish that is both cushioned and light.
Check with your doctor or allergist first. Macadamia is a tree nut.6
Only when it is coarse. Milled to a fine powder, as in our Energising Body Scrub, it gives a softer, more controlled polish than large irregular fragments would.
Sources
Every factual claim above is referenced below. Where the evidence is limited, the article says so rather than overstating it.
- 1.Manatunga SL, Furtado A, Topp B, Alam M, Mason PJ, Kharabian-Masouleh A, Henry RJ. "Analysis of phylogenetic relationships in Macadamia shows evidence of extensive reticulate evolution." Frontiers in Plant Science 2024;15:1394244.
- 2.Shuai X, Dai T, Chen M, Liang R, Du L, Chen J, Liu C. "Comparative Study of Chemical Compositions and Antioxidant Capacities of Oils Obtained from 15 Macadamia (Macadamia integrifolia) Cultivars in China." Foods 2021;10(5):1031.
- 3.Maguire LS, O'Sullivan SM, Galvin K, O'Connor TP, O'Brien NM. "Fatty acid profile, tocopherol, squalene and phytosterol content of walnuts, almonds, peanuts, hazelnuts and the macadamia nut." International Journal of Food Sciences and Nutrition 2004;55(3):171–178.
- 4.Subramanian C, Frank MW, Batte JL, Whaley SG, Rock CO. "Oleate hydratase from Staphylococcus aureus protects against palmitoleic acid, the major antimicrobial fatty acid produced by mammalian skin." Journal of Biological Chemistry 2019;294(23):9285–9294.
- 5.Pleik S, Spengler B, Schäfer T, Urbach D, Luhn S, Kirsch D. "Fatty Acid Structure and Degradation Analysis in Fingerprint Residues." Journal of the American Society for Mass Spectrometry 2016;27(9):1565–1574.
- 6.Australasian Society of Clinical Immunology and Allergy (ASCIA). "ASCIA Dietary Guide — Tree Nut Allergy."
- 7.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.
