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Al

Alpha Arbutin

Alpha-ArbutinActive

A dark-spot fader related to hydroquinone, but gentler. Often used with niacinamide or vitamin C.

What it does

It’s hydroquinone with a sugar attached. In lab tests on pigment cells, it blocked the enzyme skin uses to make pigment by taking its place, not by stopping the enzyme being made. It’s often combined with niacinamide or vitamin C.

The EU’s ingredient database lists it as an antioxidant (slows reactions with oxygen, like going rancid).European Commission, CosIng (© European Union, CC BY 4.0) · uses put in plain words by Drop ↗

The evidence, graded

expert consensusIn 2015 the SCCS (SCCS/1552/15) considered alpha-arbutin safe for consumers at up to 2% in face creams and 0.5% in body lotions, without evaluating combined use with other hydroquinone-releasing substances. In January 2023 (SCCS/1642/22) it was of the opinion that those levels are safe, also when used together, and alongside beta-arbutin at 7% in face cream. Hydroquinone should remain as low as possible.SCCS 2015 · European Commission SCCS (adopted by written procedure on 27 May 2015) ↗
emergingStart alpha arbutin and an exfoliating acid one at a time, with daily sunscreen: in one small study, skin pretreated with glycolic acid tanned more under UVB. Alpha arbutin blocks tyrosinase, the enzyme step that makes melanin. In cell studies glycolic and lactic acid block it too, whatever their acidity, so the acid clearing a path for the brightener is not what anyone measured. No study Drop has read applied the two to the same skin, so nothing measured says the pair helps or hurts.Maeda 1996 · Journal of Pharmacology and Experimental Therapeutics ↗

Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.

Pairs worth knowing

Glycolic Acid · works together ↗Niacinamide (Vitamin B3) · works together ↗L-Ascorbic Acid (Vitamin C) · works together ↗

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