K-Beauty Ingredient Glossary — What Every Active Does
Korean skincare is powered by nature-derived ingredients backed by serious science. This glossary covers the key actives you'll find across K-beauty products — what they do, who they're best for, and where to find them at COLAVO.
Snail Mucin
Also known as: Snail Secretion Filtrate
A glycoprotein-rich secretion from snails that hydrates, repairs damaged skin barriers, and promotes cell turnover. Contains glycolic acid, hyaluronic acid, and antimicrobial peptides naturally.
Deep hydration, scar fading, fine line reduction, skin barrier repair
Dry skin, aging concerns, acne scars, dehydrated skin
Find it in: COSRX Advanced Snail 96 Mucin Power Essence, COSRX Snail All-in-One Cream
Shop Snail Mucin Products →Centella Asiatica
Also known as: Cica, Tiger Grass, Madecassoside
A medicinal herb used for centuries in Asian medicine. Contains madecassoside, asiaticoside, and madecassic acid — compounds that calm inflammation, strengthen skin barrier, and promote collagen synthesis.
Anti-inflammation, wound healing, barrier strengthening, redness reduction
Sensitive skin, rosacea, post-procedure recovery, acne-prone skin
Find it in: SKIN1004 Madagascar Centella Ampoule, Dr.G Red Blemish Clear Soothing Cream
Shop Centella Asiatica Products →Hyaluronic Acid
Also known as: HA, Sodium Hyaluronate
A naturally occurring molecule that holds up to 1000x its weight in water. In skincare, different molecular weights penetrate to different depths — low-molecular-weight HA reaches deeper layers, while high-molecular-weight HA sits on the surface forming a moisture barrier.
Intense hydration, plumping, fine line smoothing, moisture retention
All skin types, especially dehydrated and aging skin
Find it in: Torriden DIVE-IN Low Molecular Hyaluronic Acid Serum, Isntree Hyaluronic Acid Toner
Shop Hyaluronic Acid Products →Niacinamide
Also known as: Vitamin B3, Nicotinamide
A form of vitamin B3 that regulates sebum production, strengthens skin barrier, reduces hyperpigmentation, and minimizes pore appearance. One of the most well-researched and versatile skincare actives.
Pore minimizing, brightening, oil control, barrier support, anti-aging
Oily skin, uneven skin tone, enlarged pores, combination skin
Find it in: Beauty of Joseon Glow Serum: Propolis + Niacinamide, SOME BY MI AHA BHA PHA 30 Days Miracle Toner
Shop Niacinamide Products →Heartleaf (Houttuynia Cordata)
Also known as: Fish Mint, Dokudami, 어성초
A Korean herbal ingredient with powerful anti-inflammatory and antibacterial properties. Rich in quercitrin and flavonoids that calm irritated skin without stripping moisture. A signature ingredient of the K-beauty brand Anua.
Calming, anti-redness, pore tightening, excess sebum control
Sensitive and acne-prone skin, redness, combination skin
Find it in: Anua Heartleaf 77% Soothing Toner, Anua Heartleaf Pore Control Cleansing Oil
Shop Heartleaf (Houttuynia Cordata) Products →Propolis
Also known as: Bee Glue
A resinous compound bees make to seal their hives — nature's antibiotic. Rich in flavonoids and amino acids. In skincare, it provides deep nourishment, fights acne-causing bacteria, and gives skin a healthy glow without greasiness.
Antibacterial, deep nourishment, glow-boosting, wound healing
Dull skin, acne-prone skin, dry skin seeking glow
Find it in: Beauty of Joseon Glow Serum: Propolis + Niacinamide, COSRX Propolis Light Ampule
Shop Propolis Products →Rice Extract
Also known as: Oryza Sativa, Rice Bran, Rice Water
A traditional Korean beauty secret — fermented rice water has been used for centuries. Contains ferulic acid, allantoin, and vitamins B and E. Brightens skin, evens tone, and provides antioxidant protection.
Brightening, evening skin tone, antioxidant protection, hydration
Dull skin, hyperpigmentation, uneven skin tone
Find it in: I'M FROM Rice Toner, Beauty of Joseon Dynasty Cream
Shop Rice Extract Products →Mugwort
Also known as: Artemisia, 쑥 (Ssuk)
A traditional Korean herb (쑥) used in medicine and food for millennia. Rich in vitamins A, C, and E, plus minerals and antioxidants. Calms inflammation, detoxifies, and helps skin recover from environmental stress.
Soothing, anti-inflammatory, antioxidant, detoxifying
Sensitive skin, urban skin exposed to pollution, irritated skin
Find it in: I'M FROM Mugwort Essence, Anua Heartleaf 77% Soothing Toner
Shop Mugwort Products →Tea Tree
Also known as: Melaleuca Alternifolia
An Australian native plant with strong antimicrobial and anti-inflammatory properties. In K-beauty, it's used at calibrated concentrations to fight acne without the harshness of benzoyl peroxide.
Acne treatment, antibacterial, anti-inflammatory, oil control
Acne-prone skin, oily skin, blemishes
Find it in: SOME BY MI AHA BHA PHA 30 Days Miracle Series, BRINGGREEN Tea Tree CICA Serum
Shop Tea Tree Products →Retinol
Also known as: Vitamin A, Retinoid
The gold standard anti-aging active. Korean retinol products are known for gentler formulations that pair retinol with soothing ingredients like centella and panthenol, reducing irritation while maintaining efficacy.
Anti-aging, wrinkle reduction, cell turnover, acne treatment
Aging concerns, fine lines, uneven texture, acne
Find it in: Anua Retinol 0.1% Caffeine Revitalizing Eye Cream, SOME BY MI Retinol Intense Reactivating Mask
Shop Retinol Products →Frequently Asked Questions
What ingredients should I avoid in Korean skincare?+
If you have sensitive skin, watch for fragrance (listed as 'parfum'), denatured alcohol (alcohol denat.), and essential oils — common irritants even in K-beauty. Otherwise, Korean products are generally gentle. Always patch test new products and introduce actives one at a time.
Can I mix Korean skincare ingredients?+
Most K-beauty ingredients layer well together. Avoid mixing: retinol + AHA/BHA (too much exfoliation), vitamin C + niacinamide at high concentrations (can cause flushing), and benzoyl peroxide + retinol (mutual inactivation). Hyaluronic acid, centella, and snail mucin layer safely with everything.
Are Korean skincare ingredients safe?+
Korean skincare is regulated by the Korean FDA (MFDS), one of the strictest cosmetic regulatory bodies globally. K-beauty brands undergo rigorous safety testing. Ingredients like snail mucin and bee propolis have decades of documented safe use. Always check ingredient lists if you have specific allergies.
What Korean skincare ingredients are best for acne?+
Tea tree oil, centella asiatica (cica), niacinamide, and BHA (salicylic acid) are the core K-beauty acne fighters. Heartleaf (Houttuynia cordata) from Anua is a rising star for acne-prone sensitive skin. Avoid heavy occlusive products and opt for lightweight, non-comedogenic formulations.