Juglans regia (Walnut) seed oil
AKA “Walnut Seed Oil
Essential Oil
Ingredient Facts
Juglans regia (Walnut) seed oil
AKA: Walnut Seed Oil
Essential Oil · Antioxidant · EWG: 3
Plant-Derived
Antioxidant
Emollient
Skin Conditioner
Essential Oil
Clean
Science: Origin: Botanic/Natural | Process: Cold Pressed / Solvent Extraction ⚠ Allergen Alert (Tree Nut): Derived from a common allergen source. May cause reactions in sensitive individuals. Safety Ratings: CIR: Safe as used
Family
Juglandaceae (Walnut family)
Plant Part
Seed
Lifeform
Tree
Climate
Temperate
CAS #
8024-09-7 / 84012-43-1
Form
Oil
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Conditions Skin
Locks In Moisture
Softens & Smooths
Traditional Use
Used in traditional European and Asian medicine for centuries as a nutritive oil for skin health; walnut has been valued since ancient Roman times for both culinary and cosmetic applications, particularly for its emollient properties.
Skin Types
all-skin-types
Best For
Dryness
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Allergen Warning
⚠️ Tree Nut (Walnut)
EWG
3
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: Kew POWO · CosIng · EWG · CIR