In this article
1. Macadamia oil: what it is and where it comes from
2. What is macadamia oil used for on the skin?
3. Guide to using macadamia oil
4. Side effects of macadamia oil: what you should know
5. Can macadamia oil be used during pregnancy?
6. Macadamia oil: your questions answered
Macadamia oil: what it is and where it comes from
Macadamia ternifolia seed oil is a vegetable oil obtained from the macadamia nut. In dermocosmetics, it's valued for its fatty acid composition, especially oleic and palmitoleic acids, as well as minor compounds like tocopherols and sterols. Translated into skin language: it's a nourishing oil, with a good ability to soften and improve the feeling of comfort.
One of its most discussed characteristics is its palmitoleic acid content, a fatty acid also present in human sebum that tends to decrease with age. This doesn't mean it "rejuvenates" the skin, but it does help to understand why it's so popular in formulas for dry or mature skin.
What is macadamia oil used for on the skin?
Its primary utility is quite clear: to act as an emollient and support the skin barrier. In practice, this translates to less tightness, more softness, and a better feeling of nourishment. It can be beneficial for dry skin, sensitive skin due to dehydration, or mature skin, and also for rough body areas.
Additionally, due to its unsaponifiable fraction and natural antioxidant content, it can help protect skin lipids against oxidative stress, though it does not replace an antioxidant formulated as a primary active ingredient, nor, of course, a sunscreen. Available evidence on vegetable oils suggests that some may promote barrier repair and modulate mild skin inflammation, but the actual effect depends heavily on the final formula.
Guide to using macadamia oil
The simplest way to use it is to apply 2 or 3 drops to slightly damp skin, after a hydrating serum. If your skin is dry, you can use it morning and night. If it's combination or oily, it's best to start only at night and assess how your skin responds.
It can also be mixed with your cream to make it more nourishing, or used as a final step to seal in hydration. On the body, it works well on dry elbows, legs, or hands. What I don't recommend is assuming that because it's "natural," you can use large amounts: with oils, more is not always better.
Side effects of macadamia oil: what you should know
Macadamia oil is generally well-tolerated in cosmetics, but that doesn't mean it's perfect for everyone. Its main function is emollient: it makes the skin more flexible and reduces water loss. Precisely for this reason, on oily or acne-prone skin, it can feel a bit heavy if used excessively or in very occlusive formulas.
The most probable side effects are usually not serious: a greasy sensation, the appearance of a comedone in predisposed individuals, or irritation if the product contains perfume or other sensitizing ingredients. It is also advisable to exercise caution if you have a history of nut allergies, although skin tolerance does not always correlate with food allergies. If in doubt, perform a patch test on a small area for 24-48 hours.
Can macadamia oil be used during pregnancy?
In general, yes. Topical macadamia oil is considered compatible during pregnancy because it is not associated with specific risks when applied to the skin and does not contain active ingredients with common restrictions, such as retinoids. Even so, the sensible recommendation is to review the complete cosmetic formula, because the problem is usually not the oil itself, but other added ingredients.
If your skin is more sensitive than usual, which is common during this stage, start with a small amount and observe tolerance. The most helpful approach during pregnancy is usually to prioritize simple, well-formulated products without intense fragrances if you are prone to irritation.
Macadamia oil: your questions answered
These are the most common questions when this oil appears in a facial or body routine.
Is macadamia oil comedogenic?+
Not necessarily, but as an oil rich in fatty acids, it can feel heavy on some oily or acne-prone skin types. On dry or mature skin, it is usually better tolerated.
Can it be used every day?+
Yes, if your skin tolerates it well. It is common to use 2 or 3 drops once or twice a day, especially when you feel dryness or tightness.
Is it suitable for sensitive skin?+
It can be beneficial because it's emollient and helps reduce water loss, but it's advisable to do a patch test if you have very reactive skin or allergies.
Do you apply it before or after cream?+
Typically after serum and before or after cream depending on the texture. If you're looking to seal in hydration, it usually works best as the last step.
Can it be used during pregnancy?+
Yes. Topical macadamia oil is considered compatible during pregnancy, provided there is no individual allergy to the product.
Sources and references
- Vaughn AR, Clark AK, Sivamani RK, Shi VY. (2018). Natural oils for skin-barrier repair: Ancient compounds now backed by modern science. American Journal of Clinical Dermatology. DOI: https://doi.org/10.1007/s40257-017-0301-1
- Lin TK, Zhong L, Santiago JL. (2018). Anti-Inflammatory and Skin Barrier Repair Effects of Topical Application of Some Plant Oils. International Journal of Molecular Sciences. DOI: https://doi.org/10.3390/ijms19010070
- Wallis KL, Gebauer SK, Harris WS. (2016). New insights into omega-7 fatty acids. Current Opinion in Clinical Nutrition and Metabolic Care. DOI: https://doi.org/10.1097/MCO.0000000000000249
- Akhtar N, Khan BA, Haji M, et al. (2014). Evaluation of various functional skin parameters using a topical cream of nut oils. Acta Poloniae Pharmaceutica. DOI: https://doi.org/10.32383/appdr/83979
