Macadamia (Macadamia ternifolia/integrifolia) seed oil is a plant-derived emollient rich in monounsaturated fatty acids, notably palmitoleic acid, used to soften skin and reduce transepidermal water loss. It functions as a conditioning agent in moisturizers and cosmetic formulations rather than as a therapeutic active.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation or mild redness | Rare | Generally well tolerated; occasional sensitivity in reactive skin. |
| Allergic contact dermatitis | Rare | Isolated case reports of sensitization to the oil or related botanicals. |
| Comedogenicity / pore congestion | Uncommon | Considered low-to-moderate comedogenic; acne-prone skin may break out. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.