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Arb4.0

Alpha-Arbutin

High safety

Evidence

Evidence Score4/10

Studies: 6

Meta-analyses: 0

Dosage & timing

Dosage:

Topical cosmetic only. Alpha-arbutin is typically used at roughly 1-2% in leave-on serums, applied to areas of hyperpigmentation once or twice daily, usually alongside daily sunscreen and often with other brighteners. There is no oral, injectable, or systemic dose — it is not ingested. This library does not provide an ingestion protocol.

Best Time:

Any time

Can take on empty stomach

Form:

Leave-on topical serum (≈1-2% alpha-arbutin)

What you'll notice

ℹ️ Cosmetic, appearance-only — not a health effectneutral

Throughout

🌗 Modest brightening / more even tonepositive

8-12 weeks

✅ Generally well toleratedpositive

Throughout

Safety

High safety

Contraindications:

For topical (skin) use only — not for ingestion, not for injection
Known allergy or sensitivity to arbutin or hydroquinone
Application to broken, irritated, or compromised skin until healed

Drug Interactions:

Other leave-on actives (acids, retinoids, other brighteners)

Side Effects:

Mild local irritation or rednessHydroquinone-related sensitivity (from degraded product)

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