K-Beauty Ingredient Glossary

Bakuchiol is a plant-derived compound (from Psoralea corylifolia) often marketed as a “retinol alternative” because some studies report comp…

Retinol is the cosmetic-grade form of vitamin A, the most-studied class of topical anti-aging ingredients. It increases cell turnover, suppo…

Sponge-derived microscopic needles (typically from Spongilla lacustris) that create transient micro-channels in the stratum corneum to enhan…

Ginseng (Panax) is a heritage Korean botanical with a luxury skincare positioning. Cosmetic chemistry credits its saponins (ginsenosides) wi…

Vitamin E (tocopherol) is a fat-soluble antioxidant used as a stabilizer for other actives (notably vitamin C) and as a barrier-supportive l…

Beta-glucan is a polysaccharide sourced from oats, yeast, or fungi. Cosmetic chemistry credits it with humectant action plus modulation of b…

Bifida ferment lysate is the lysed material from Bifidobacterium fermentation. In modern skincare it is positioned within the “microbiome ca…

Ceramides are lipid molecules that make up roughly half of the skin barrier by mass. Topical ceramides — most commonly NP, AP, and EOP — dir…

Squalane is the saturated, stable cosmetic version of squalene, an oil naturally present in human sebum. Modern K-beauty uses olive- or suga…

Azelaic acid is a dicarboxylic acid with antibacterial, anti-inflammatory, and tyrosinase-inhibiting properties. It is used for inflammatory…

Galactomyces ferment filtrate is the filtered byproduct of fermentation by Galactomyces yeast. Cosmetic literature attributes hydration, per…

Glutathione is a tripeptide antioxidant found naturally in human cells. In topical cosmetics it is positioned for tone-evening and a brighte…

Niacinamide is a form of vitamin B3 with one of the broadest evidence bases in modern skincare: it supports barrier function via ceramide sy…

Tranexamic acid is a lysine derivative used in topical cosmetics for stubborn pigmentation — melasma, post-acne marks, and uneven tone. In K…

Vitamin C in cosmetics most often appears as L-ascorbic acid (pure form, potent but unstable) or as more stable derivatives (Ascorbyl Glucos…

Gluconolactone is a PHA — a larger-molecule exfoliant that operates more on the surface and tends to be gentler than AHA/BHA. It also has hu…

Glycolic acid is the smallest AHA, derived from sugarcane. It exfoliates the surface of the skin, addressing dullness, uneven texture, and s…

Salicylic acid is an oil-soluble BHA that can penetrate sebum-filled pores, making it the workhorse acid for blackhead and acne management. …

Spring-harvested birch tree sap rich in minerals and amino acids; used in Korean toners and sunscreens (notably Round Lab) for lightweight h…

Topical collagen is far too large a molecule to physically replace skin collagen — instead, hydrolyzed collagen acts as a film-forming humec…

Glycerin is the most-used humectant in modern cosmetics — a small molecule that draws water from the deeper skin and the surrounding humidit…

Hyaluronic acid is a humectant polysaccharide naturally present in skin. Cosmetic HA comes in multiple molecular weights — low-MW penetrates…

Snail secretion filtrate is the filtered mucin produced by snails under non-stressful collection conditions. It is a complex mixture of glyc…

Tremella fuciformis mushroom polysaccharide with humectant properties comparable to hyaluronic acid; positioned as a plant-based alternative…

Tea tree oil is a botanical essential oil from Melaleuca alternifolia with antibacterial positioning. K-beauty uses it primarily in oil-cont…

Peptides are short chains of amino acids that act as cosmetic signaling, carrier, or enzyme-modulating ingredients. Specific peptide complex…

Exosomes are nanometer-scale lipid vesicles that cells release for intercellular signaling. In cosmetics they are typically derived from pla…

PDRN is a polymer of small DNA fragments — originally salmon-sperm-derived — used in regenerative medicine via injection. In K-beauty 2025–2…

Allantoin is a small molecule used in cosmetics for soothing and keratolytic (gentle smoothing) effects. It appears in many K-beauty toners …

Blue compound derived from chamomile (and other plants) used in K-beauty for calming redness, sensitive-skin support, and after-sun soothing…

Centella Asiatica is a botanical extract used in K-beauty as a hero soothing and barrier-supporting ingredient. The plant is rich in triterp…

Houttuynia cordata (Korean: 어성초) is a herbaceous plant used in K-beauty as a soothing and pore-care positioned extract. Cosmetic claims cent…

Madecassoside is one of the four key triterpenoid actives isolated from Centella Asiatica. Compared to whole Centella extract, it is a singl…

Mugwort (Artemisia) extract has a long tradition in Korean topical care for irritated or compromised skin. Cosmetic formulations rely on its…

Panthenol is a stable form of provitamin B5. On skin it acts as a humectant and supports recovery from minor irritation — the workhorse soot…

Propolis is a resinous substance bees collect from plant buds, used in K-beauty for its antioxidant flavonoids and a perceived “glow” effect…

Traditional Korean skin-water heritage ingredient — rice-derived starches, peptides, and antioxidants associated with gentle hydration, brig…