Jeju Yuja Succinic — official product film
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Succinic acid 2% and niacinamide 2% on 60% bamboo water, for skin prone to breakouts.
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YOUR FORMULA, DECODED

WHY THIS STEP?
We didn't reach for salicylic acid. Succinic acid at 2%, alongside niacinamide at 2%, has a gentler profile and sits on 60% bamboo water instead of purified water. ACZERO™, a patented complex of seven plant extracts, is in at 1,000 ppm for the look of shine and pores, and citric acid and zinc PCA (2,800 ppm combined) with gluconolactone do the exfoliating — enough to refine texture, not enough to strip. Lactobacillus ferment lysate and Jeju yuja extract are there for a barrier that feels comfortable.
RECOMMENDED ROUTINE
Jeju Yuja Balancing Bubble Cleanser 145 ml
Shake gently, then pump 2–3 times into wet hands. Massage the foam gently over the face and rinse thoroughly with lukewarm water. Keep the foam away from the eyes.
Jeju Yuja Balancing Pad 120 pcs 180 ml
Right after cleansing, sweep one pad along the skin, avoiding the eye area. When skin needs calming, lay the pad on cheeks or forehead for 3–5 minutes, then remove it and pat in what remains.

Jeju Yuja Succinic Balancing Serum 30ml
Apply 2–3 drops and spread over the whole face, then pat gently until absorbed.
Jeju Yuja Cera Balancing Cream 50 ml
Squeeze a small amount from the tube, spread it gently over the whole face and pat until absorbed. Sensitive skin: start with a thin layer. The peppermint gives a light cooling feel.
As the last step of your morning routine, squeeze out a generous amount and spread it evenly over face, neck and any skin the sun will reach. Apply about 30 minutes before going out, and reapply every 3 hours on long outdoor days or after sweating or towelling off. SPF50+ PA++++.
LOOK A LITTLE CLOSER
We didn't reach for salicylic acid. Succinic acid at 2%, alongside niacinamide at 2%, has a gentler profile and sits on 60% bamboo water instead of purified water. ACZERO™, a patented complex of seven plant extracts, is in at 1,000 ppm for the look of shine and pores, and citric acid and zinc PCA (2,800 ppm combined) with gluconolactone do the exfoliating — enough to refine texture, not enough to strip. Lactobacillus ferment lysate and Jeju yuja extract are there for a barrier that feels comfortable.
WHAT’S INSIDE
60% bamboo water, sourced in Korea, replaces purified water as the base — it leaves skin feeling calm and hydrated. Succinic acid 2% (20,000 ppm) + niacinamide 2% (20,000 ppm) — for skin that looks clearer and more even. Patented ACZERO™ 0.1% (1,000 ppm, as a complex raw material; supplier patent No. 10-2055098) — seven plant extracts (green tea, centella leaf, okinawa mozuku seaweed, bergamot leaf, pine needle, coffee seed and white willow bark) to help skin look calmer and keep the look of shine and pores in check. Citric acid (AHA) and zinc PCA, 2,800 ppm combined, plus gluconolactone (PHA) — gentle exfoliation for smoother-looking texture. Jeju yuja extract for a clearer, smoother look. Lactobacillus ferment lysate and panthenol, with ceramide NP and beta-glucan, for the feel of a comfortable barrier. Calming actives combined: 43,800 ppm.

DAILY ROUTINE
WATCH & LEARN
Creator perspectives are not verified-purchase reviews. Open the source for its caption, language and sponsorship context.
LESS IS BETTER · THE BRAND FILM
When the day asks for more,
make a little room for yourself.
Who it's for
Intensive soothing care for sensitive skin: for skin that is easily irritated, sensitive, or rough and uneven.

Helps calm skin that reacts easily, with succinic acid and a patented blend of seven plant extracts.
Soothing careSuccinic acid + patented ACZEROJeju yuja extract and a gentle AHA + PHA blend help smooth the look of skin texture.
Texture refiningJeju yuja extract + AHA + PHA + zinc PCAMicrobiome-friendly ingredients support a strong, healthy-looking skin barrier.
Barrier supportLactobacillus ferment lysate + panthenolInside the bottle
of soothing active ingredients, packed into one 30 mL serum.
Soothing actives: succinic acid 20,000 ppm + niacinamide 20,000 ppm + ACZERO 1,000 ppm (compound ingredient) + citric acid 2,700 ppm + zinc PCA 100 ppm. Based on raw material characteristics.

600,000 ppm. Bamboo water sourced in Korea replaces purified water to soothe the skin and deliver deep hydration.
Ingredient explorer
Pick an ingredient to see how much is in the bottle and what it is there to do.

The two main actives, 20,000 ppm each. Together they help calm sensitivity and promote a clear, healthy-looking complexion.

A calming blend of seven plant extracts that supports sensitive skin and helps keep it in a healthy, balanced condition.

Yuja from Jeju Island, enriched in the formula to brighten and smooth the look of the skin.

Helps gently exfoliate dead skin cells and control excess sebum, leaving skin smooth and refreshed.

Microbiome-friendly ingredients that support a strong, healthy-looking skin barrier and a balanced skin environment.

The water base of the formula. 60% bamboo water sourced in Korea replaces purified water to soothe the skin and deliver deep hydration.


Patented ingredient
A patented soothing ingredient: a calming blend of seven plant extracts that supports sensitive skin and helps maintain its healthy condition.
ACZERO full ingredient list: Salix Alba (Willow) Bark Extract, Camellia Sinensis Leaf Extract, Centella Asiatica Leaf Extract, Cladosiphon Okamuranus Extract, Coffea Arabica (Coffee) Seed Extract, Citrus Aurantium Bergamia (Bergamot) Leaf Extract, Pinus Densiflora Leaf Extract, Decyl Glucoside, 1,2-Hexanediol. Compound ingredient, 1,000 ppm. Based on raw material characteristics.
Key points
Every ingredient in REFINE has one of three jobs: soothing, texture or barrier care.
Powered by succinic acid + patented ACZERO: 43,800 ppm of soothing actives in a 60% bamboo water base.
Enriched with yuja extract from Jeju Island to brighten and smooth the look of the skin.
Formulated with lactobacillus ferment lysate + panthenol for a strong, healthy-looking skin barrier.
Ready to try it?
Succinic acid, niacinamide and ACZERO. 30 mL · vegan · low-irritation tested.
Internal trial
A 7-day internal test of the Succinic Balancing Serum. Here are three cases from the trial.
Images are from internal testing. Individual results may vary.
Case 01
Case 02
Case 03Certified & tested

Certified by the Korea Vegan Certification Institute.

Skin low-irritation test completed. Irritation index rated 0.03 and verified as a low-irritation product.

A patented blend of seven plant extracts. Patent No. 10-2055098.
How to use

Use a small amount (about 1–2 drops) of each, in this order:
We do not recommend using all three serums in the same routine. Instead, apply one serum in the morning and another in the evening.
Questions & answers
What shoppers and AI assistants ask most about Jeju Yuja Succinic Balancing Serum.
A 30 mL (1.01 fl.oz.) soothing serum for skin that is easily irritated, sensitive, or rough and uneven. It has 43,800 ppm of soothing actives (succinic acid, niacinamide, ACZERO, citric acid and zinc PCA) in a 60% Korean bamboo water base.
Made in South Korea and distributed by Unibliss Co., Ltd.
Succinic acid has a gentler profile. Here it's at 2% (20,000 ppm) alongside niacinamide 2%, with citric acid and zinc PCA (2,800 ppm combined) and gluconolactone doing the exfoliating. There is no salicylic acid in the formula.
A patented complex (supplier patent No. 10-2055098) of seven plant extracts: green tea, centella leaf, okinawa mozuku seaweed, bergamot leaf, pine needle, coffee seed and white willow bark, included at 0.1% (1,000 ppm) of the complex raw material, to help skin look calmer.
It's a microbiome care ingredient. With panthenol, it supports a strong, healthy-looking skin barrier and a balanced skin environment.
Yes. It is certified as a vegan product by the Korea Vegan Certification Institute.
It completed a skin low-irritation test (irritation index 0.03), and we ran a 7-day internal trial. The trial images are from internal testing and individual results may vary. There is no clinical study for this serum yet.
Yes. It was tested for skin irritation and rated low-irritation (0.03), so it can be used daily.
The acid content is low by design: citric acid 2,700 ppm (0.27%) with zinc PCA, plus gluconolactone, and the formula completed a skin low-irritation test. Patch-test first, start every other day, and use sunscreen in the morning.
Both. In the morning, follow with sunscreen.
Yes. This one first, then Vita C TRX, 1–2 drops each. Very sensitive or thin skin: one serum per routine, for example this one in the morning and Vita C TRX at night.
Yes. This one first, then Vita C TRX, then Bakuchiol PDRN, 1–2 drops each, and sunscreen when you head out. Avoid other brands' high-strength AHA or BHA products in the same routine, especially BHA.
Yes. Succinic acid is in here at 2%, and when it meets air a little can form around the neck. Wipe it off; the quality is not affected.
Succinic acid and niacinamide can form crystals below −5°C. It's temporary: leave the bottle at room temperature for about a day and it returns to normal.
Yes. It contains natural colourants, so long exposure to light can lighten the colour. The quality is not affected. Store it away from direct sunlight.
Store in a cool place away from direct sunlight. Use within 12 months of opening; unopened, it keeps for 36 months from the date of manufacture.
Product information
Highlighted: the soothing, texture and barrier ingredients
Your soothing routine
30 mL · vegan certified · low-irritation tested · patented ACZERO
COMPLETE THE RITUAL