Hydroquinone
The gold-standard pharmacologic depigmenting agent. Highly effective for melasma; long-term use risks ochronosis if uncontrolled.
Inhibits tyrosinase and damages melanosomes selectively in melanocytes, reducing melanin production.
- Strongest depigmenting agent
- Effective for melasma
- Used in Kligman triple combination
What the evidence supports.
- All skin types
- Pregnant
- Breastfeeding
- Long-term use without breaks
Mid-routine serum or treatment step.
Concentration range in well-formulated products: 2%–4% (Rx)
Best autumn/winter cycles; off for summer with strict SPF.
Cycle 12 weeks on / 12 weeks off to prevent ochronosis. Mandatory SPF.
Hydroquinone is a regulated medication. Use only under the guidance of a licensed physician or dermatologist. The information here is educational, Skinlumis does not dispense prescriptions or provide medical advice.
The research behind Hydroquinone.
Every claim on this page traces to published research. Findings below are drawn from randomized trials and systematic reviews, each links to the study on PubMed.
International Journal of Dermatology, 2004
British Journal of Dermatology, 2002
International Journal of Dermatology, 1991
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3 studies from the Intelligence Vault that discuss Hydroquinone.
- rct · CureusPost-inflammatory Hyperpigmentation in Skin of Color: Emerging Therapies and Treatment Algorithms.
- rct · Sci RepSafety and efficacy of niosomal and conventional tranexamic acid/niacinamide vs. hydroquinone creams in melasma: A randomized, double-blind, case-controlled clinical trial.
- rct · J Cosmet SciEvaluating the Safety and Efficacy of a Topical Formulation Containing Epidermal Growth Factor, Tranexamic Acid, Vitamin C, Arbutin, Niacinamide and Other Ingredients as Hydroquinone 4% Alternatives to Improve Hyperpigmentation: A Prospective, Randomized, Controlled Split Face Study.