Common Name(s): Txa,anti-melasma active,plasminogen inhibitor brightener

CAS Number: 1197-18-8

DESCRIPTION

What It Does: Provides plasminogen pathway inhibition brightening via unique upstream melanocyte stimulation blockade.

Why It's Used: Brightening mechanism complement — tranexamic acid's plasminogen inhibition brightening works entirely independently from tyrosinase inhibitors, providing complementary brightening coverage and synergistic combination possibilities with kojic acid, arbutin, or niacinamide for comprehensive melasma management.

How It Works: Uv → keratinocyte arachidonic acid release → plasminogen → prostaglandin e2 → melanocyte pomc → alpha-msh → melanogenesis. txa blocks plasminogen activation upstream. pharmaceutical: 3-5% oral txa comparable to 4% hq for melasma. topical: 2-5% serum clinical studies. gentler than hq: no ochronosis risk.

Typically Found In: Melasma treatment,advanced brightening,hyperpigmentation serums

TECHNICAL DETAILS

Primary Category: Active ingredient – brightening / tyrosinase inhibitor

Secondary Functions: Melanin inhibition,hyperpigmentation reduction

Application Areas:

Typical Concentration Range: 2%–5%

SOURCING & ETHICS

Vegan Status: Yes – synthetic

Halal Status: Yes

Source Notes: Synthetic or plant-derived.

SKIN COMPATIBILITY

Irritancy Rating: 1/5 – very low

Comedogenicity Rating: 0/5 – non-comedogenic

Sensitivity Concerns: Non-irritating; well-tolerated.

Safe for Sensitive Skin: Yes

SAFETY & COMPATIBILITY

Safety Profile: Excellent safety profile. use with spf for maximum efficacy. ewg score: 1.

Works Well With: Niacinamide,vitamin c,alpha-arbutin,tranexamic acid,spf

Avoid Combining With: No significant incompatibilities

SCIENTIFIC NOTE

Tranexamic acid's uv-specific brightening mechanism (blocking the uv-triggered keratinocyte-plasminogen-prostaglandin-melanocyte cascade) provides targeting specificity for photo-induced hyperpigmentation that general tyrosinase inhibitors lack: txa specifically inhibits the pathway that uv radiation uniquely activates, making it most effective for sun-triggered melasma and age spots from uv exposure. general tyrosinase inhibitors work regardless of the melanogenesis trigger, while txa's upstream uv-pathway specificity makes it ideally suited for sun-related hyperpigmentation.

Last Verified: 2026-03-12

Primary Sources: Cosing database,soo et al. tranexamic acid melasma review