Castanea Crenata Inner Shell Pore Tightening Serum

A pore-tightening serum powered by 81% chestnut shell extract from Gongju

This pore-refining serum is formulated with 81% chestnut shell extract sourced from chestnuts grown in Gongju, South Chungcheong Province. Rich in tannins, the extract helps visibly tighten enlarged pores, while Antisebum P regulates sebum production to keep excess oil in check. The texture is viscous and cushiony on application, but absorbs into a lightweight, non-sticky finish that feels fresh on skin. Formulated without synthetic fragrance and scented only with natural extracts, it's gentle enough for those sensitive to scent.

Clinically proven instant pore-tightening results

In a human application test, visible pore improvement was observed after just one use.

• Pore count: 31.07% improvement
• Pore area: 19.16% improvement

The serum also passed a primary irritation test on sensitive skin and was rated non-irritating, making it suitable for reactive skin types. However, individual reactions may vary, so we recommend patch-testing on the inner arm or behind the ear before first use.

For pore concerns and skin in need of soothing

Beyond chestnut shell extract, the formula includes two patented ingredients. Derma-clera helps calm skin sensitized by external stressors while supporting barrier function and moisture retention, and Syn-Hycan contributes to elasticity and hydration. It's especially well-suited for combination to oily skin with visibly enlarged pores or excess sebum, as well as skin that's become reactive due to environmental stress. Recommended for anyone looking to target pore-tightening and skin texture refinement at the same time.

After toner, before essence or cream

Serum is the step that comes right after you've prepped your skin with toner. Apply this serum—formulated with 81% elm root extract—first, then follow with your cream or moisturizer to help the pore-refining actives adhere better to skin. For a complete pore care routine, pair it with the elm root toner from the same line in the step before.

Suitable for morning and evening use

There's no time-of-day restriction—this serum works beautifully in both your AM and PM routines. In the morning, use it to refine pores before makeup. In the evening, treat it as an intensive step to address sebum and impurities that build up throughout the day. Clinical testing showed visible improvement after just one use: pore count reduced by 31.073% and pore area by 19.162%.

Rich texture—a little goes a long way

Dispense 2–3 drops with the dropper and smooth over areas where pores are a concern. The formula has a slightly viscous texture, so warm it gently between your palms before pressing it into skin for a lighter, more seamless finish. For areas where pores look more visible—like around the nose or on the cheeks—feel free to layer a second application.

Pairing suggestions by skin concern

• If pores and excess oil are both concerns: The Antisebum P ingredient helps regulate sebum production, so prep skin with the elm root toner first, then layer this serum on top.
• If dryness is a worry: Derma-clera supports barrier function and hydration, but for extra comfort without tightness, seal everything in with a moisturizing cream after the serum absorbs.
• If you want smoother texture too: Use a gentle exfoliator once or twice a week to boost serum absorption and refine skin texture even further.

Good to know before use

This product has completed a primary irritation test for sensitive skin, but if it's your first time using it, do a patch test on your inner arm or behind your ear. Store at room temperature away from direct sunlight, and if you experience redness, itching, or any irritation during use, discontinue and consult a dermatologist.

Bamboo Extract, Butylene Glycol, Water, 1,2-Hexanediol, Betaine, Niacinamide, Glycerin, Trehalose, Panthenol, Xylitylglucoside, Anhydroxylitol, Xylitol, Glucose, Glyceryl Acrylate/Acrylic Acid Copolymer, Sodium Hyaluronate, Dipotassium Glycyrrhizate, Pueraria Lobata Root Extract, Pinus Palustris Leaf Extract, Ulmus Davidiana Root Extract, Oenothera Biennis (Evening Primrose) Extract, Fucus Vesiculosus Extract, Prunella Vulgaris Extract, Oryza Sativa (Rice) Flower Extract, Palmitoyl Tripeptide-5, Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate, Zea Mays (Corn) Leaf Extract, Centella Asiatica Extract, Magnesium Chloride, Isodecane, Dimethiconol, Dimethicone/Vinyl Dimethicone Crosspolymer, Undecane, Tridecane, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, Coccinia Indica Fruit Extract, Corallina Officinalis Extract, Arginine, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Xanthan Gum, Hydroxyethylcellulose, Adenosine, Disodium EDTA

The list of ingredients is subject to change. Please consult the packaging of the product purchased.