Alpha Arbutin
Skin brightener that inhibits melanin production to reduce hyperpigmentation.
What is Alpha Arbutin?
CAS Number
84380-01-8
Formula
C12H16O7
Molecular Weight
272.25 g/mol
Also known as: 4-Hydroxyphenyl alpha-D-glucopyranoside, Alpha-Arbutin
What does Alpha Arbutin do for skin?
Glycosylated hydroquinone derivative that inhibits tyrosinase without the cytotoxicity of free hydroquinone. The alpha-glucoside bond provides 10x stronger tyrosinase inhibition than beta-arbutin. Reduces melanin synthesis by competing with L-DOPA at the tyrosinase active site. Does not release free hydroquinone under normal physiological conditions.
Typical concentration: 0.5-2% (most effective at 1-2%)
Is Alpha Arbutin safe?
Good safety profile. Non-cytotoxic unlike hydroquinone. CIR Expert Panel: safe up to 2% in leave-on products. No photosensitivity concerns.
What does the research say about Alpha Arbutin?
Alpha-arbutin inhibits melanin synthesis more effectively than arbutin
Sugimoto et al., Biological and Pharmaceutical Bulletin, 2004
Inhibitory effects of alpha-arbutin on melanogenesis
Funayama et al., Biological and Pharmaceutical Bulletin, 1995