Cirsium Setidens Leaf Extract: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 24, 2025
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All information on this page is verified using The Personal Care Products Council's (PCPC) INCI database. Our ingredient analyses are based exclusively on PCPC's technical data to ensure accuracy and reliability.

What Is Cirsium Setidens Leaf Extract?

Cirsium Setidens Leaf Extract comes from the leaves of Cirsium setidens, a thistle that grows in East Asia’s mountain regions. Traditionally the plant was eaten as a spring green in Korea, and folk remedies used it to soothe skin irritation. Modern researchers later found that the leaves contain flavonoids, phenolic acids and natural sugars that help bind water to the skin, which sparked interest in the beauty industry.

To create the extract, harvested leaves are washed, dried and then soaked in a mix of water or a gentle solvent. This liquid pulls the beneficial compounds from the plant material. The solution is filtered, concentrated and finally standardized for consistency before it reaches cosmetic labs.

You are most likely to see Cirsium Setidens Leaf Extract in hydrating masks, daily moisturizers, soothing toners, lightweight lotions and anti-aging serums that focus on keeping skin soft and comfortable.

Cirsium Setidens Leaf Extract’s Cosmetic Benefits/Uses

This extract is prized for one standout role in skincare.

Skin conditioning: the mix of plant sugars and antioxidants helps the outer layer hold onto moisture, leaving skin feeling smoother and looking fresher. It can calm the feel of tight or flaky areas, making formulas gentler and more nurturing for dry or stressed complexions.

Who Can Use Cirsium Setidens Leaf Extract

Cirsium Setidens Leaf Extract is gentle enough for most skin types. Dry or mature skin often benefits the most thanks to the ingredient’s water-binding sugars, but normal, combination and even oily or blemish-prone skin can use it because the extract is lightweight and non-greasy. Sensitive skin usually tolerates it well since it is not acidic or exfoliating. There are no known reasons for any skin type to avoid it, other than a personal allergy to thistle plants.

Because it is 100 percent plant derived with no animal by-products, it suits both vegans and vegetarians. The extraction process relies on water or mild plant-based solvents, so it aligns with most cruelty-free and clean beauty standards.

No data suggest that Cirsium Setidens Leaf Extract poses a risk to pregnant or breastfeeding women when used topically in cosmetic amounts. This is not medical advice, and anyone who is pregnant or nursing should check with a healthcare professional before adding new skincare products just to be safe.

The extract is not known to cause photosensitivity, so it will not make skin more prone to sunburn. Of course a broad-spectrum sunscreen is still smart daytime practice for overall skin health.

Potential Side Effects/Adverse Reactions

Reactions to topical Cirsium Setidens Leaf Extract can vary from person to person. The following list covers potential side effects, though most users will not experience them when the ingredient is formulated and used as intended.

  • Mild redness or itching
  • Allergic contact dermatitis in those sensitive to plants in the daisy family
  • Transient stinging if applied to cracked or freshly exfoliated skin
  • Dryness when paired with high levels of alcohol in a formula

If you notice any of the effects above, stop using the product and consult a healthcare professional for guidance.

Comedogenic Rating

Rating: 0 / 5

Cirsium Setidens Leaf Extract is primarily water soluble and contains minimal oils or waxes so it does not clog pores. Its main components are plant sugars, antioxidants and lightweight polyphenols that rinse clean without leaving an occlusive film.

Because of this it is generally suitable for skin that is prone to acne or breakouts.

Bear in mind that a formula’s full ingredient list matters; heavy butters, silicones or fatty alcohols added by the brand could still trigger congestion even if the extract itself is non-comedogenic.

Summary

Cirsium Setidens Leaf Extract conditions skin by binding water to the outer layer and supplying antioxidants that help soften texture and support a healthy looking barrier. Its sugar molecules attract moisture while flavonoids calm the feel of irritation, which is why formulators slip it into hydrating masks, toners and daily creams.

Although not as famous as aloe or green tea, the extract is gaining quiet popularity in Korean beauty circles and shows up more often in global moisturizers aimed at gentle hydration.

Current data point to a very safe profile with low risk of irritation or pore blockage. Still, everyone’s skin is different so it is wise to patch test any new product that features this ingredient before applying it to the entire face.

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