Silybum Marianum Seed Oil
A milk thistle seed oil rich in linoleic acid. It nourishes and softens skin and supports the barrier. Well tolerated.
Evidence by route
Topical application
A nourishing plant oil. Safe.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Milk thistle seed oil (INCI Silybum Marianum Seed Oil) is a plant oil rich in linoleic acid, an essential fatty acid that skin recognizes well. In a formula it nourishes and softens, supplying lipids that support the barrier. As an emollient it does its job, and the high linoleic profile is interesting for skin prone to dryness or flaking. It is not an active with dramatic clinical results but a solid supporting oil: it hydrates through light occlusion and improves feel. It also carries natural antioxidants that add stability. Topically it has no systemic relevance, so it can be used during pregnancy and breastfeeding. Tolerance is good, with low irritation and allergy. Comedogenicity is very low (1 of 5), suitable for most skin types. As with any plant oil, very oily or acne-prone skin may prefer lighter textures.
Frequently asked questions
Is Silybum Marianum Seed Oil safe during pregnancy?
Silybum Marianum Seed Oil is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Silybum Marianum Seed Oil for?
Silybum Marianum Seed Oil suits: normal, dry, combination, oily, sensitive.
What is Silybum Marianum Seed Oil and what does it do in cosmetics?
A milk thistle seed oil rich in linoleic acid.
Is Silybum Marianum Seed Oil comedogenic?
On the Fulton scale 1/5 – very low comedogenicity. For acne-prone skin, a rating of 3 or higher suggests choosing an alternative.
What's the INCI name for Silybum Marianum Seed Oil?
The INCI name is Silybum Marianum Seed Oil. It may also appear as: Milk Thistle Seed Oil.
See Silybum Marianum Seed Oil in a product composition right on the store page
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