Alpha Arbutin
Also known as: α-Arbutin, 4-Hydroxyphenyl α-D-glucopyranoside
Description
Alpha arbutin is a biosynthetic glycosylated hydroquinone derivative that inhibits melanin production. It is more stable and considered safer than hydroquinone, making it a popular depigmenting agent in Indian and Asian skincare. It works by reversibly inhibiting tyrosinase without cytotoxic effects on melanocytes. [Sugimoto 2004] [Funayama 1995]
Mechanism of Action
Reversibly inhibits tyrosinase, the rate-limiting enzyme in melanin biosynthesis. Unlike hydroquinone, it does not cause melanocyte death. Slowly releases hydroquinone in a controlled manner, reducing the risk of irritation and ochronosis. [Funayama 1995]
Indications
- Melasma [Sugimoto]
- Post-inflammatory hyperpigmentation [Sugimoto]
- Sun spots [Funayama]
- Uneven skin tone [Sugimoto]
- Dark spots
Available Concentrations
Side Effects
- Mild irritation (rare) [Sugimoto]
- Contact dermatitis (very rare) [Sugimoto]
Contraindications
- Known hypersensitivity to arbutin or hydroquinone
Pregnancy Category
Not classified (consult dermatologist)
Found In
Cosmetics containing Alpha Arbutin
Related Conditions
References
- Funayama M, Arakawa H, Yamamoto R, et al. "Effects of alpha- and beta-arbutin on activity of tyrosinases from mushroom and mouse melanoma." Biosci Biotechnol Biochem, 1995. doi:10.1271/bbb.59.143
- Sugimoto K, Nishimura T, Nomura K, et al. "Inhibitory effects of alpha-arbutin on melanin synthesis in cultured human melanoma cells and a three-dimensional human skin model." Biol Pharm Bull, 2004. doi:10.1248/bpb.27.510
Limitations
This page provides a general overview of Alpha Arbutin in dermatology. It does not cover every possible use, formulation, or interaction. Individual responses to compounds vary — what works for one person may not work for another. Always consult a qualified dermatologist before starting or changing any treatment.