Ingredients

Adenosine is a compound naturally present in skin cells, used in skincare as an anti-aging active, appearing across many Korean serums, moisturizers, and sunscreens as a supporting ingredient.

Allantoin is a soothing compound, naturally occurring in some plants and also made synthetically, used broadly across Korean cleansers, serums, moisturizers, and sunscreens to calm irritation.

Arbutin is a brightening compound used in Korean skincare as part of multi-active formulas, generally paired with other brightening ingredients rather than sold as a standalone treatment.

Beta-glucan is a polysaccharide often derived from oats or yeast, used in Korean skincare as a soothing, hydrating supporting ingredient.

Birch juice, or birch sap, is sap tapped from birch trees, used in Korean skincare as a lightweight hydrating base. Round Lab has built an entire product line, spanning cleanser, serum, moisturizer, and sunscreen, around this single ingredient family.

Centella asiatica, also called Cica or tiger grass, is a plant extract long used in traditional medicine for wound healing, now a cornerstone calming ingredient across Korean skincare.

Ceramides are lipids that make up a large share of the material naturally found between skin cells, forming a core part of the skin's barrier. Formulas use named types like Ceramide NP, and some combine several types into a complex.

Cholesterol is one of the three core lipids, alongside ceramides and fatty acids, that make up the skin barrier. In skincare, it works together with ceramides to reinforce the barrier and reduce moisture loss, rarely used as a standalone ingredient.

Ectoin is a compound originally derived from extremophile bacteria, used in skincare for its protective, stabilizing properties, a genuinely less common ingredient in this catalog's current lineup.

Ginseng root extract comes from the Panax ginseng root, used for centuries in East Asian traditional medicine, appearing across Korean skincare as an antioxidant and tone-supporting ingredient.

Glutathione is an antioxidant naturally produced by the body, also used topically in some brightening formulas across Korean skincare, generally as part of a multi-active blend rather than a standalone treatment.

Green tea extract comes from Camellia sinensis leaves, rich in polyphenol antioxidants called catechins, used across Korean skincare as a supporting antioxidant ingredient in cleansers, sunscreens, and serums.

Heartleaf, or Houttuynia cordata, is a plant extract traditionally used in East Asian medicine, popularized in K-beauty specifically for calming and anti-irritation effects on sensitive and redness-prone skin.

Hyaluronic acid is a humectant naturally found in skin, capable of holding many times its weight in water. Formulas often use the salt form, sodium hyaluronate, valued for water solubility and stability, and some combine multiple molecular weights, Torriden uses 5 types, Wellage uses 8, VT PDRN Air Cloud uses 9, to hydrate at different skin depths at once.

Hydrolyzed collagen is collagen broken down into smaller peptide fragments for better skin penetration, used in Korean serums and moisturizers as a hydrating, skin-conditioning supporting ingredient.

Licorice root extract in skincare is often used as dipotassium glycyrrhizate, a specific compound isolated from licorice root, not the same thing as a whole licorice-root extract, valued for its calming properties.

Madecassoside is one of centella asiatica's key active compounds, often isolated and purified from the whole plant extract and used in skincare at its own concentration, separate from or alongside centella asiatica itself.

Mung bean extract is a botanical ingredient used in Korean cleansers for its calming properties, built into beplain's entire cleanser identity around this single ingredient.

Niacinamide is a form of vitamin B3, one of the most studied ingredients in cosmetic dermatology, used across Korean skincare in concentrations ranging from a gentle 2% in daily formulas up to a clinically-concentrated 10% in targeted treatments.

Panthenol is pro-vitamin B5, which converts to pantothenic acid once absorbed into skin. It's one of the most common supporting ingredients across Korean skincare, appearing in cleansers, serums, moisturizers, and sunscreens alike.

PDRN, short for polydeoxyribonucleotide, is a DNA-fragment ingredient commonly derived from salmon, used across Korean regenerative skincare in both serums and moisturizers.

Salicylic acid, a beta hydroxy acid (BHA), is an oil-soluble exfoliant able to penetrate into pores, commonly used in Korean cleansers and treatments for oily and acne-prone skin. Some formulas use betaine salicylate, a gentler, buffered derivative, instead of the pure acid.

Snail mucin, technically snail secretion filtrate, is a K-beauty staple ingredient used for hydration and repair, sold at a range of concentrations from a supporting presence up to a concentrated 96% headline dose.

Squalane is a stable, skin-identical oil, usually plant-derived from olives or sugarcane in modern formulas, used as an emollient that softens skin and helps prevent moisture loss without feeling heavy or greasy.

Tea tree, from Melaleuca alternifolia, appears in Korean skincare in genuinely different forms: a diluted hydrosol (tea tree leaf water), and a concentrated essential oil (tea tree leaf oil), with real differences in strength between the two.

Tranexamic acid, often shortened to TXA, is a brightening active used in Korean skincare at clinically-relevant concentrations, typically paired with niacinamide rather than sold as a standalone active.

Turmeric root extract, from Curcuma longa, is a botanical ingredient confirmed in beplain's Mung Bean pH-Balanced Cleansing Foam, verified independently across multiple retailer ingredient listings.

Vitamin C appears in Korean skincare in genuinely different chemical forms: pure L-ascorbic acid, the classic, most-studied form; stabilized derivatives engineered for gentleness; and naturally-derived plant extracts like green tangerine.

Tocopherol is the chemical name for vitamin E as typically used in skincare formulas, a fat-soluble antioxidant vitamin appearing across cleansers, serums, moisturizers, and sunscreens as a common supporting ingredient.