Hydrogenated Macadamia Seed Oil
AKA “Hardened macadamia nut oil, Hydrogenated macadamia oil
Oil
Ingredient Facts
Hydrogenated macadamia seed oil
AKA: Hardened macadamia nut oil, Hydrogenated macadamia oil
Oil · Hair Conditioning · EWG: 1
Plant-Derived
Skin Conditioner
Hair Care
Clean
Hydrogenated Macadamia Seed Oil is the end-product of the controlled hydrogenation of the oil expressed from the seeds of Macadamia integrifolia, Proteaceae
Effective at 30.0%
Family
Proteaceae (Protea family)
Plant Part
Seed
CAS #
129811-19-4
Form
Oil
See origin →
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
Macadamia nut oil was traditionally used by indigenous Australians for skin and hair care. Hydrogenation of macadamia seed oil was developed in the 20th century to create a more stable oil suitable for cosmetic formulations while maintaining its emollient and nourishing properties.
Skin Types
all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
Allergen Warning
⚠️ Tree Nut (Macadamia)
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
0.0005%
60.0%
0%84%
Effective Range
CIR reported use: 0.3-4 | 0.001-3 | 0.01-15 | 0.0005-60 | 0.06-3
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR