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The INKEY List

Polyhydroxy Acid Toner.

The INKEY List Polyhydroxy Acid Toner
Toners

About this product

A liquid exfoliant toner containing 3% polyhydroxy acid (gluconolactone) and 3% niacinamide, designed to gently exfoliate and hydrate without the strength of glycolic or salicylic acid.

Best for

Type

TonersLiquid

Guru Score

80%

Approved

7 experts · Strong agreement
7Gurus
5Approved
2Mixed
0Skip
#5 in TonersSee the ranking →

What the gurus are saying

Polyhydroxy acids like gluconolactone in this formula exfoliate very gently while also hydrating, making it a solid choice for sensitive skin and those who find stronger exfoliants too harsh. The addition of niacinamide and glycerin means it won't strip the skin the way older astringent toners did. Because it's so mild, those who tolerate it can use it twice daily, though a few times a week is a safe starting point; pat or swipe it on with a cotton pad and ease up if your skin feels irritated.
Synthesized from 7 expert reviews · most recent take March 2026
Every take, in full

What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Approved takes Critical takes Mixed takes Hide sponsored
Mixed
"Polyhydroxy acids such as gluconolactone are both hydrating and very gently exfoliate. As long as it's tolerated, they can be used twice a day. They're super gentle exfoliants and they can be used twice a day."
Approved
"You can also use instead of something with glycolic and salicylic and [L-ascorbic] acid a polyhydroxy acid. The Inkey List makes a really nice one."
Approved
"The toner I'm going to recommend is a liquid exfoliant, again from The INKEY List, their Polyhydroxy Acid Toner. It's lovely, very affordable, again $14 on Amazon. This contains 3% polyhydroxy acid that's going to act as a hydrating ingredient, at the same time over time helps to improve dullness, along with 3% niacinamide, that is also an antioxidant, anti-inflammatory ingredient that really works well with polyhydroxy acid to tackle dullness, uneven skin tone, and skin texture, and also contains aloe that's going to be hydrating at the same time. This is something I recommend actually pouring onto your palm and then patting onto your skin, instead of swiping with a cotton pad, that may just be a little bit too abrasive physically. But you can use this a couple times a week, almost like a hydrating toner slash chemical exfoliant in one."
All 3 takes from Dr. Jenny Liu
Sensitive Skin routine for less then $100 from a dermatologist | Dr. Jenny Liu
"The toner I'm going to recommend is a liquid exfoliant, again from The INKEY List, their Polyhydroxy Acid Toner. It's lovely, very affordable, again $14 on Amazon. This contains 3% polyhydroxy acid that's going to act as a hydrating ingredient, at the same time over time helps to improve dullness, along with 3% niacinamide, that is also an antioxidant, anti-inflammatory ingredient that really works well with polyhydroxy acid to tackle dullness, uneven skin tone, and skin texture, and also contains aloe that's going to be hydrating at the same time. This is something I recommend actually pouring onto your palm and then patting onto your skin, instead of swiping with a cotton pad, that may just be a little bit too abrasive physically. But you can use this a couple times a week, almost like a hydrating toner slash chemical exfoliant in one."
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"The Inkey List Polyhydroxy Acid Toner contains three percent polyhydroxy acid along with three percent niacinamide. It's a great one that's more affordable, and polyhydroxy acids are more of a humectant but over time it can certainly slowly improve that skin texture and skin radiance. This is something I really love if you have sensitive skin."
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"Another one I really like, and more affordable, is The Inkey List PHA toner. You apply it with a cotton pad or pat it over your skin a few times a week. Polyhydroxy acid is super gentle, even a great humectant and antioxidant, so it can be used more regularly."
Approved
"The Inkey List PHA is different from AHAs and BHAs and they're a lot milder. It contains a product called gluconolactone, which is a mild exfoliant that's a little bit more gentle in terms of its exfoliation, so it doesn't damage the skin and it can be used by all skin types. What's really nice within the ingredients is they've included niacinamide, which is a skincare favorite, and also it's got glycerin in there as well. So if you look at this formulation, it's a far cry from the old astringent toners which had alcohol in there. It's a clean formulation that can be used as a nice toner. If you want to include a toner, this is something that I really do recommend."
Mixed
"The INKEY List PHA Toner is, against common belief, not really an exfoliating toner. The Polyhydroxy Acids are acids by name, but more hydrating than exfoliating compared to your regular AHAs. While I like it well, I don't think I will repurchase though."
Approved
"If you want a more deluxe experience without breaking the bank, the Inkey List PHA Toner is an awesome one, particularly if you have sensitive skin that you'll be able to use more frequently. It exfoliates but very gently, removes the dead skin cells from your face."
Approved
"The INKEY List does toners phenomenally, and I don't know why they don't get a lot of attention for that. This is the PHA, polyhydroxy acid, toner. If the Ordinary's toning solution is too much for you, this is a godsend, it's your guardian angel. It is non-irritating compared to the Ordinary's, and yet it's a little bit hydrating and nourishing to the skin. It has a really low molecular weight, I think it's 73 or 74 grams per mole, but it's absolutely wonderful. If your skin needs a little bit of a glow, maybe you have a little bit of acne or post acne marks, this stuff is so good. Polyhydroxy acid is a big, thick, chunky molecule. These PHAs are super good at holding onto water and they kind of hang out on top of the skin because of how big and chunky they are. They don't penetrate, but they exfoliate gently on top, and they're really good at holding moisture into the skin. It's like a leveled up, even more sensitive version of the glycolic toner, so if you're super sensitive and even glycolic is too much for you, or if you're much drier and you just need the moisture, that's when the PHA comes in."
Top Pick: gentle liquid exfoliant
Common questions

Frequently asked.

What is The INKEY List Polyhydroxy Acid Toner?

A liquid exfoliant toner containing 3% polyhydroxy acid (gluconolactone) and 3% niacinamide, designed to gently exfoliate and hydrate without the strength of glycolic or salicylic acid.

Is The INKEY List Polyhydroxy Acid Toner worth it?

Mostly yes. 5 of the 7 gurus who reviewed it give it their stamp of approval, for a Guru Score of 80%.

What is The INKEY List Polyhydroxy Acid Toner's Guru Score?

The INKEY List Polyhydroxy Acid Toner holds a Guru Score of 80%. That is our read on how warmly the experts talk about it, based on the verdicts of 7 independent expert reviewers we have collected. At least one expert has named it a Top Pick in its category.

Who is The INKEY List Polyhydroxy Acid Toner best for?

The INKEY List Polyhydroxy Acid Toner is generally suited to sensitive skin.

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