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Short term and long term issues are described Short-term: Exogenous ochronosis. It is a possible side effect from prolonged use of hydroquinone, especially at concentrations higher than 4% It has also been described for resorcinol, phenols (such as rhododenol), oral... READ MORE

4-Hydroxyanisole (4-OHA) L’acide ascorbique (Vitamine C) (L-ascorbic acid) L‘acide azélaïque (AZA) L’acide kojique L’arbutine Formulation 4-Hydroxyanisole-Trétinoïne L’hydroquinone (HQ) (1) (2) Les sels de mercure Le monobenzone 20% (Bénoquine) Le monobenzone 40% Les pilules... READ MORE

Pigmentation Disorders Chloasma (Melasma, Pregnancy Mask) Freckles Idiopathic guttate hypomelanosis (IGH) Post-inflammatory hyperpigmentation (PIH) Solar lentigenes (liver spots) Vitiligo   “Traditional” Depigmenting Products 4-Hydroxyanisole (4-OHA)... READ MORE