Alpha arbutin and hydroquinone are related, but they are not the same. Alpha arbutin is hydroquinone bonded to a sugar molecule, and it is sold in cosmetics. Hydroquinone is a drug, legal in the US only with a prescription. Both slow the enzyme that makes pigment. Hydroquinone is far stronger and carries more risk.
What each one is
Hydroquinone is the classic pigment-fading drug. For years it was sold over the counter in the US. That ended with the CARES Act of 2020. The FDA now says over-the-counter products containing hydroquinone are unapproved drugs, and that the only hydroquinone product it has approved is a prescription cream, Tri-Luma, meant for short-term use on moderate to severe melasma of the face.
Alpha arbutin is a cosmetic ingredient. A 2021 review in the journal Antioxidants describes it as a compound of hydroquinone and glucose. Its cousin, beta arbutin, is the form found in plants such as bearberry, pear and wheat. The same review notes that arbutin has been studied for about 30 years as an alternative to hydroquinone.
IYASA does not sell either one. Our Brightening Cream takes a different route, with 10% niacinamide and 5% vitamin C.
How they work on pigment
Dark spots are areas where the skin has made extra melanin. An enzyme called tyrosinase runs the first steps of that process. Hydroquinone and alpha arbutin both slow tyrosinase, which is why they get compared so often.
They are not equally strong. The review cites lab work in which hydroquinone cut tyrosinase activity inside cells by half at a concentration 100 times lower than arbutin needed. That gap helps explain why one is regulated as a drug and the other is sold as a cosmetic ingredient.
Alpha arbutin vs hydroquinone, side by side
| Alpha arbutin | Hydroquinone | |
|---|---|---|
| What it is | Hydroquinone bonded to glucose | The plain molecule |
| US status | Cosmetic ingredient | Prescription drug |
| Usual strength | Up to 2% in face creams, 0.5% in body lotions (the EU safety limit) | Set by the prescriber |
| Strength in lab tests | Mild | Much stronger |
| Known concerns | Can release small amounts of hydroquinone | Rashes, facial swelling, ochronosis (a discoloration of the skin) |
Is alpha arbutin just hidden hydroquinone?
Partly, and this is the piece most comparison articles skip. Because alpha arbutin is built on hydroquinone, it can break down and release some. The review reports that this can happen in the jar, depending on storage, and on the skin, through skin microorganisms or UV light.
European regulators looked at exactly this question. In its February 2023 opinion, the EU's Scientific Committee on Consumer Safety concluded that alpha arbutin is safe in face creams at up to 2 percent and in body lotions at up to 0.5 percent. It added that hydroquinone in these products should stay as low as possible, no higher than unavoidable traces.
So the practical rules are short. Buy alpha arbutin from a brand that prints the percentage. Keep the jar away from heat and sunlight. Do not layer several arbutin products to push the dose past what was reviewed.
What the risks of hydroquinone look like on dark skin
The FDA says it has received reports of serious side effects from hydroquinone products, including skin rashes, facial swelling and ochronosis. Ochronosis is the one that worries people with melanin-rich skin most, because the product meant to fade a dark patch can leave a new discoloration behind.
Unlabeled creams sold as fast lighteners are a separate problem. Our guide to hydroquinone, mercury and steroid creams explains how to spot them. For a comparison with another common ingredient, see kojic acid vs hydroquinone.
Which one should you pick?
- Your doctor prescribed hydroquinone for melasma. Use it exactly as directed and for the period they set. It is a drug and should be used like one.
- You want to even out everyday dark marks. Stay on the cosmetic side. Alpha arbutin at or under 2 percent is one option. Niacinamide, vitamin C and kojic acid are others.
- You found hydroquinone for sale without a prescription. Skip it. In the US that product is not legally on the market.
Whatever you choose, patch test first and wear a separate sunscreen every morning. Sun undoes the work of any pigment ingredient.
What IYASA uses instead
We formulate without hydroquinone and without alpha arbutin. The Brightening Cream pairs 10% niacinamide with 5% vitamin C in a water-based moisturizer, and the Kojic Acid & Turmeric Brightening Soap is the wash-off step. Niacinamide works differently from both ingredients in this article; our niacinamide guide explains how. Every formula is independently lab-tested, with no hydroquinone and no mercury found. Orders of $39.99 or more come with a free gift, the soap or the Vitamin C scrub.
Frequently asked questions
Is alpha arbutin the same as hydroquinone?
No. Alpha arbutin is hydroquinone joined to a glucose molecule and is sold as a cosmetic ingredient. Hydroquinone itself is a drug that needs a prescription in the US.
Is alpha arbutin safer than hydroquinone?
EU safety reviewers consider alpha arbutin safe in cosmetics at up to 2 percent in face creams and 0.5 percent in body lotions. Hydroquinone has reports of rashes, facial swelling and ochronosis behind it, which is why it is regulated as a drug.
Does alpha arbutin turn into hydroquinone on the skin?
A small amount can. A published review reports that skin microorganisms and UV light can release hydroquinone from arbutin, which is why regulators want those traces kept as low as possible.
Can I use alpha arbutin and hydroquinone together?
Only if the doctor who prescribed the hydroquinone agrees. Stacking two pigment-slowing products raises the chance of irritation, and irritated skin can leave new dark marks on melanin-rich skin.
Does IYASA use alpha arbutin or hydroquinone?
No, neither one. Our cream uses niacinamide and vitamin C, and our soap uses kojic acid and turmeric.
Sources
- FDA, notice on over-the-counter hydroquinone products: over-the-counter products with hydroquinone are unapproved drugs, Tri-Luma is the only hydroquinone product the agency has approved, and the agency has reports of rashes, facial swelling and ochronosis.
- Boo YC. Arbutin as a Skin Depigmenting Agent with Antimelanogenic and Antioxidant Properties. Antioxidants, 2021: alpha arbutin is a compound of hydroquinone and glucose, it acts on tyrosinase, hydroquinone is far more potent in lab tests, and arbutin can release hydroquinone in storage or on the skin.
- EU Scientific Committee on Consumer Safety, opinion on alpha arbutin and beta arbutin in cosmetic products, February 2023: alpha arbutin is considered safe at up to 2 percent in face creams and 0.5 percent in body lotions, with hydroquinone kept to unavoidable traces.