Alpha-arbutin, explained
A popular, gentle brightener in Korean serums. What it does for age spots and uneven tone, and how strong the evidence is.
Research growing
What it does
Alpha-arbutin slows down tyrosinase, the enzyme skin uses to make pigment. Over time, that can help soften dark spots and uneven tone.
Why it suits skin over 40
Age spots and patchy tone build up after years of sun. Alpha-arbutin is gentle, so it’s easy to add alongside other actives, and it often appears with niacinamide in Korean serums.
How to use it
- Morning or night, usually at around 2% in serums.
- Pairs well with niacinamide, vitamin C and tranexamic acid.
- Give it 8 to 12 weeks, and wear sunscreen every day, or new spots will undo the work.
- In the UK and EU, safety experts consider alpha-arbutin safe up to 2% in face products.
What the research shows
A 2021 scientific review found that arbutin reliably reduces pigment production in lab and skin-model studies, but that good clinical trials in people are still limited. Some small studies combine it with other brighteners, which makes its own effect harder to judge.
Boo, Antioxidants, 2021 [1]
Compare prices: Alpha-arbutin
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- Compare prices for Beauty of Joseon Glow Deep Serum Rice + Alpha Arbutinfrom £18.99 delivered
Good to know
Is alpha-arbutin safe?
At up to 2% in face products, safety experts consider it safe. Choose products from reputable shops.
Alpha-arbutin or vitamin C?
Vitamin C has stronger evidence. Alpha-arbutin is gentler and can be used alongside it.
How long does alpha-arbutin take to work?
Usually 8 to 12 weeks of daily use, with sunscreen.
Sources
This page is general information, not medical advice. Last updated 30 October 2026.