Silybum marianum (Milk Thistle) seed oil
AKA “Silimarin, Silybin, Flavobin Spofa, Silymarin (>80%), Silibin
Essential Oil
Ingredient Facts
Silybum marianum (Milk Thistle) seed oil
AKA: Silimarin, Silybin, Flavobin Spofa, Silymarin (>80%), Silibin
Essential Oil · Antioxidant · EWG: 4
Plant-Derived
Antioxidant
Emollient
Skin Conditioner
Essential Oil
Clean
Milk thistle seed oil deeply conditions and nourishes skin and hair with antioxidants. This Mediterranean plant extract helps restore softness and smoothness.
Family
Asteraceae (Daisy family)
Plant Part
Seed
Lifeform
Annual or biennial
Climate
Subtropical
CAS #
84604-20-6
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.
Anti-Inflammatory
Moisturizing
Locks in moisture to keep skin soft and supple throughout the day
Boosts Collagen
Softens and smooths skin
Traditional Use
Milk thistle has been used in traditional European medicine since ancient times for liver health and skin conditions. The seed oil is a modern cosmetic extraction; traditionally the herb was used internally and topically for anti-inflammatory purposes.
Skin Types
all-skin-types
Best For
Sensitivity
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
EWG
4
CIR
Safe
Pregnancy
Caution
CIR Safety Findings
Not a Sensitizer
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: Kew POWO · CosIng · EWG · CIR