Silybum Marianum Extract
INCI: Silybum Marianum Fruit Extract
Reviewed by Emma · Last updated 18 Aug 2026
Also known as: Silybum Marianum Seed Oil
Silymarin marianum extact comes from a plant whose many
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What Is Silybum Marianum Extract?
Silymarin marianum extact comes from a plant whose many components, primarily a flavanolignan chemical known as silymarin, have pronounced antioxidant and skin-calming ability. Silymarin occurs in milk thistle fruit and seeds, and helps shield skin from the visible effects of UV light exposure (of course, you still need a broad spectrum sunscreen).
Silymarin also has research on its role in interrupting pathways in skin that lead to discolourations on skin’s surface, while that and other compounds in milk thistle seem, at least in a lab setting, to have an inhibitory effect on enzymes that degrade collagen. In short, it’s an impressive antioxidant to see in skin care products, particularly those that address environmental stressors.
Clinical Evidence & References
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Silybum Marianum Extract is a variant of Silybum Marianum Seed Extract, the form you will most often see on an ingredients list.
Plant extract traditionally used to support skin conditioning and antioxidant activity
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Silybum Marianum Seed Extract
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Silybum Marianum Seed Oil
Silybum marianum seed oil comes from the milk thistle plant
Silybum Marianum Fruit Extract
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