K-Beauty Ingredient Encyclopedia

Known as 'Tiger Grass' because tigers reportedly roll in it to heal their wounds. Centella Asiatica is rich in saponins (madecassoside, asiaticoside) that soothe inflammation, speed up wound healing, and stimulate new cell growth. It is a cornerstone of modern K-Beauty for sensitive skin.

Best for: Sensitive, acne-prone, or compromised skin barriers.

Avoid if: Virtually safe for all unless specifically allergic to the plant.

A resinous mixture produced by honeybees. It has powerful antibacterial, antifungal, and antiviral properties. For the skin, it is a magnificent healing agent that also provides a deep, natural glow (the 'honey skin' effect).

Best for: Acne-prone but dry or dehydrated skin.

Avoid if: Those with severe bee allergies.

A medicinal herb from East Asia known for its cooling and anti-inflammatory properties. It is exceptionally rich in flavonoids, particularly Quercetin, which neutralizes free radicals.

Best for: Hot, inflamed, or extremely sensitive acne-prone skin.

Avoid if: Safe for most users.

A weed with a long history in Korean traditional medicine (Hanbang). It is inherently warming (unlike Heartleaf which is cooling) and incredibly healing for battered barriers.

Best for: Stressed, mature, or eczema-prone skin.

Avoid if: Those with severe ragweed/mugwort pollen allergies.

A water-soluble form of Vitamin B3. It is arguably the most versatile active ingredient in skincare. It works by inhibiting the transfer of melanosomes to skin cells, thereby reducing hyperpigmentation. It also dramatically increases ceramide production.

Best for: Oily, combination, and hyperpigmented skin.

Avoid if: Some individuals experience flushing at concentrations above 10%.

A nutrient-dense yeast derived from the fermentation of sake. Discovered when brewers noticed their hands looked remarkably young despite their age. It is packed with vitamins, amino acids, and minerals.

Best for: Dull, textured, or aging skin.

Avoid if: Those suffering from fungal acne (Malassezia folliculitis), as ferments can exacerbate it.

Originally an oral medication to control bleeding, applied topically it interrupts the pathways that trigger melanin production. It is highly effective against melasma and post-inflammatory erythema (redness).

Best for: Skin with persistent melasma or red acne marks.

Avoid if: No major contraindications for topical use.

Naturally contains a complex blend of hyaluronic acid, glycoprotein, proteoglycans, and antimicrobial and copper peptides. It acts as an incredibly potent healing agent and humectant, giving the skin a plump, glowing appearance.

Best for: Dry, dehydrated, and aging skin.

Avoid if: Those with dust mite allergies (proven cross-reactivity).

The crown jewel of Hanbang cosmetics. Ginseng contains powerful ginsenosides that boost blood circulation, increasing oxygen flow to skin cells to promote cell turnover and collagen production.

Best for: Aging, tired, or dull skin lacking vitality.

Avoid if: Generally safe.

A hydration powerhouse derived from fermented soybeans (natto). It holds up to 5,000 times its weight in water, significantly outperforming hyaluronic acid. It also forms a flexible, smooth film on the skin to prevent moisture evaporation.

Best for: Extremely dry or dehydrated skin.

Avoid if: Safe for all skin types.