Anti-aging
Retinol
A widely used active for fine lines and pigmentation, with notes on concentration and side effects.
Read more →Ingredient Guide
Cosmetic ingredient encyclopedia
Each ingredient's benefits, concentration differences, side effects and pairings in one place. An ingredient encyclopedia to help you choose by reading the label.
Anti-aging
8
Anti-aging
Peptide
A gentle anti-aging active used as a retinol alternative, with little irritation.
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Anti-aging
Bakuchiol
What bakuchiol does for skin and why, what the study comparing it with retinol found, which skin it suits, how to choose and products with bakuchiol.
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Anti-aging
PDRN (Polydeoxyribonucleotide)
What you can expect from PDRN skincare and why, how it differs from dermatology salmon injections, how to find it on the ingredient list as sodium DNA, and products.
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Anti-aging
Collagen
The structural protein behind skin elasticity. Why topical collagen stays on the surface, what hydrolyzed collagen does, and the evidence for oral collagen.
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Anti-aging
Adenosine
How adenosine helps with wrinkles, which skin it suits, what to check when it works in tiny amounts, and products grouped by what they pair it with.
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Anti-aging
Vitamin E (Tocopherol)
Why vitamin E (tocopherol) protects skin, how tocopherol and tocopheryl acetate differ, why it pairs with vitamin C, which skin it suits and products to look at.
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Anti-aging
Retinol Cream
What a retinol cream does and why, how it differs from a serum, and how to choose one.
Read more →Brightening
9
Brightening
Niacinamide
Brightening, pores, and barrier support in one. The Vitamin B3 active.
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Brightening
Vitamin C
Brightening, antioxidant, and collagen support. Forms compared on stability.
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Brightening
Glutathione
Written 글루타티온 on Korean labels. Where it sits across 172 products, and what the brightening claim rests on.
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Brightening
Vitamin C (4 Types)
How vitamin C derivatives differ from pure vitamin C, why derivatives exist, the common types, how to choose one for your skin, and products with derivatives.
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Brightening
Tranexamic Acid
What tranexamic acid does for melasma and dark spots and why, which skin it suits, how to choose a tranexamic acid product, and products to look at.
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Brightening
Azelaic Acid
Why azelaic acid is used for acne, redness and dark spots together, how it works, which skin it suits, and how cosmetics differ from prescription products.
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Brightening
Arbutin
Why arbutin fades dark spots, how alpha arbutin differs, how Korea's MFDS treats it as a whitening ingredient, which skin it suits and products to look at.
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Brightening
Tranexamic Acid Cream
Choose a tranexamic acid cream by where the ingredient sits on the list, with creams that carry it near the front.
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Brightening
Vitamin C Ampoule
An ampoule is not separated from a serum by its name. How to tell pure vitamin C from derivatives and products with it near the front.
Read more →Hydration
7
Hydration
Panthenol (Pro-Vitamin B5)
Why panthenol hydrates and soothes skin, which skin it suits, how to choose a panthenol cream, products by skin type and how to apply it.
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Hydration
Hyaluronic Acid
A key hydrating ingredient that draws in moisture, with notes by molecular size.
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Hydration
Squalane
What squalane does for skin and why, how it differs from squalene, which skin it suits, where it goes in your routine and products by skin type.
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Hydration
Beta-Glucan
A hydrating and soothing ingredient from oats and yeast. How it forms a moisture film, calms irritated skin, and pairs with other actives.
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Hydration
Glycerin
The most widely used moisturizing ingredient in cosmetics. How it draws water from the air and deeper skin layers, and how it compares to hyaluronic acid.
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Hydration
Urea
Urea moisturizes at 10% or below and exfoliates above it. Strength differences and how to choose a body lotion.
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Hydration
Hyaluronic Acid Ampoule
An ampoule is not separated from a serum by its name. How to read the ingredient list and products with it near the front.
Read more →Barrier
3
Barrier
Ceramide
A core barrier ingredient. The 5-type complex and its ratio.
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Barrier
Allantoin
Soothes irritated skin and gently smooths the surface. Delivers both calming and keratolytic benefits at once.
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Barrier
Zinc
A mineral ingredient for sebum control and inflammation reduction. Forms, benefits, and pairing with niacinamide.
Read more →Exfoliation
1
K-Beauty
5
K-Beauty
Centella (Cica)
Saponins such as madecassoside for soothing and recovery.
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K-Beauty
Galactomyces
The core of SK-II Pitera. How the amino-acid ferment complex works.
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K-Beauty
Snail Mucin
A natural complex of glycosaminoglycans, allantoin, and collagen.
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K-Beauty
Propolis
A natural resin made by bees. Flavonoid-driven soothing and antioxidant action, plus the allergy caution.
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K-Beauty
Houttuynia Cordata
A traditional East Asian herb. Flavonoid-driven soothing and antimicrobial support for oily and trouble-prone skin.
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