Brightening Agent

4-Butylresorcinol

One of the most potent skin-brightening ingredients available, targeting melanin production through multiple pathways for rapid, visible results.

brighteninghyperpigmentationmelanin inhibitoradvanced

⚠ Unknown

Comedogenic Rating

0/5

Irritation Potential

1/5

What is it?

4-Butylresorcinol is a resorcinol derivative that acts as a dual-pathway melanin inhibitor. Unlike single-target brighteners, it simultaneously inhibits tyrosinase and TRP-1 (tyrosinase-related protein 1), producing more comprehensive depigmentation.

Used in intensive brightening serums and dark spot treatments to rapidly reduce the appearance of hyperpigmentation, melasma, and uneven skin tone.

Key Benefits

✦

Dual melanin inhibition

Inhibits both tyrosinase and TRP-1, blocking melanin synthesis more completely.

◈

Rapid brightening

Clinical studies show visible reduction in dark spots within 4–8 weeks.

✧

Broad efficacy

Effective for melasma, sun spots, and post-inflammatory hyperpigmentation.

Suitable for

skin with hyperpigmentationuneven skin toneskin with melasmadark spots

Main Actions

✓ tyrosinase inhibition✓ TRP-1 inhibition✓ brightening✓ hyperpigmentation reduction

When it may be insufficient

Effective at low concentrations (0.1–0.3%). Should be combined with daily SPF to prevent re-pigmentation. May cause mild irritation — patch test recommended.

Frequently Asked Questions

What does 4-Butylresorcinol do for skin?

Used in intensive brightening serums and dark spot treatments to rapidly reduce the appearance of hyperpigmentation, melasma, and uneven skin tone.

Who should use 4-Butylresorcinol?

4-Butylresorcinol is suitable for: skin with hyperpigmentation, uneven skin tone, skin with melasma, dark spots.

Are there any warnings about 4-Butylresorcinol?

Effective at low concentrations (0.1–0.3%). Should be combined with daily SPF to prevent re-pigmentation. May cause mild irritation — patch test recommended.

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