Index / Paula's Choice / 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid
Paula's Choice

Paula's Choice 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid.

About this product

A lightweight niacinamide serum booster with 10% niacinamide plus mandelic and lactic acids, designed to layer into moisturizers or apply alone to address uneven skin tone, enlarged pores, and dullness.

Full ingredients

Water, Niacinamide, Acetyl Glucosamine, Ascorbyl Glucoside, Butylene Glycol, Phospholipids, Sodium Hyaluronate, Allantoin, Boerhavia Diffusa Root Extract, Glycerin, Dipotassium Glycyrrhizate, Glycyrrhiza Glabra (Licorice) Root Extract, Epigallocatechin Gallate, Beta-Glucan, Panthenol, Carnosine, Genistein, Citric Acid, Sodium Citrate, Sodium Hydroxide, Xanthan Gum, Ethylhexylglycerin, Polysorbate 20, Trisodium Ethylenediamine Disuccinate, Pentylene Glycol, Caprylyl Glycol, Phenoxyethanol

More from Paula's Choice 49 products · Guru Score 89% →

Guru Score

72%

Mixed

9 experts · Strong agreement

What the gurus are saying

The 10% niacinamide concentration divides expert opinion. Some praise the booster's lightweight, layerable formula and results on dullness and tone, noting it pairs well with retinoids and vitamin C. However, several dermatologists caution that 10% exceeds the research-backed 5% threshold and may irritate sensitive skin, with a few suggesting lower concentrations work just as well without the risk. Those with resilient skin and no history of sensitivity may find it effective; anyone prone to irritation may want to patch-test first or consider a 5% alternative.
Synthesized from 9 expert reviews · most recent take August 2026

What they liked

  • Lightweight formula that layers easily
  • Pairs well with retinoids and antioxidants
  • Flexible for morning or evening use

What they flagged

  • 10% concentration exceeds studied effective dose

Type

Formula notes

Fragrance-freeNo drying alcohol

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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 Yay takes Nay takes Mixed takes Hide sponsored
~Yay
"Paula's Choice 10% Niacinamide Booster is a great product for niacinamide, and it works well alongside a vitamin C, whether you use it in the morning or move it to night if you've got sunspots or hyperpigmentation."
All 2 takes from Darnell Cox | 50+ Healthy Aging Expert
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"Paula's Choice makes a really good 10% niacinamide booster as well."
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"Paula's Choice 10% Niacinamide Booster is a great product for niacinamide, and it works well alongside a vitamin C, whether you use it in the morning or move it to night if you've got sunspots or hyperpigmentation."
~Yay
"And then we have the [Paula's Choice] 10% Niacinamide Booster, which is really excellent for layering."
All 2 takes from Dr. Aleksandra Brown
Niacinamide: Does It Really Work? Dermatologist Explains the Hype, Benefits & Best Products
"This is a concentrated booster designed to mix into your moisturizer or apply alone if you have really, really tolerant skin. It targets [...] uneven skin tone, enlarged pores, dullness. It has a really lightweight formula. It adds flexibility to any routine. Layers easily with other actives. It really pairs well with retinoids, especially if you're going to add it to a moisturizer. It pairs well with antioxidants. So it's a great option for either morning or evening routine."
Best Anti-Aging Ingredients Ranked by a Dermatologist
"And then we have the [Paula's Choice] 10% Niacinamide Booster, which is really excellent for layering."
~Mixed
"And this isn't going to work for everyone. 10% can work for some, but some might find it too sensitizing. If your skin can tolerate a 10% niacinamide and you're already using it, you could always swap whatever product you're reaching for out for this Paula's Choice one. [...] It's going to work for some, but I would say 10% niacinamide can be a lot for certain people, particularly those that are prone to sensitivity."
~Nay
"When you see a 10% niacinamide you're like do I really need 10%? It's double what the recommended amount is. Is that good? But then you get up into like the 20% and it's like wow, okay, now you're more likely to get irritation. The more you have of anything, it's not like the more of things the better it is. Sometimes less is more. [...] Studies show 5% is sufficient for pretty much all your clinical endpoints."
All 2 takes from Doctorly
Products We LOVE and HATE From Paula's Choice | Doctorly Reviews
"When you see a 10% niacinamide you're like do I really need 10%? It's double what the recommended amount is. Is that good? But then you get up into like the 20% and it's like wow, okay, now you're more likely to get irritation. The more you have of anything, it's not like the more of things the better it is. Sometimes less is more. [...] Studies show 5% is sufficient for pretty much all your clinical endpoints."
The ULTIMATE Routine for Dark Spots | Doctorly Hyperpigmentation and Melasma Guide
"This is going to be a gentle formula but be a nice exfoliant for the skin. You're going to leave it on all night and then just moisturize afterwards. You're not going to want to use that on the same night that you're using the retinol because we don't know if that's going to cause too much irritation."
~Yay
"Look for products that have higher concentrations of niacinamide I like ones from Paula's Choice"
~Yay
"You're using Paula's Choice niacinamide that's a good niacinamide"
~Yay
"There are some dedicated niacinamide serums that you can buy if you just want to add in that ingredient to your skin care. Paula's Choice makes a niacinamide booster. I would not go for the ten or twenty percent boosters, I would go for something around five percent. Studies have shown that anything above five percent can actually be irritating to the skin."
~Mixed
"I [...] personally don't feel that concentration of niacinamide is necessary. From data we know that five percent niacinamide is the amount you need to see results, and sometimes overexposure to certain ingredients can push your skin into the sensitivity range. However, if she hasn't noticed any adverse effects to the product then I don't think there's a problem with it. [...] I love Paula's Choice, I love niacinamide, I love that she's incorporating it into her routine."
~Yay
"This serum is the one that actually made a big difference on my skin and it made me really try out other niacinamide products. I've seen other people say the same thing, that this one is just the one that works the best for them. [...] The texture is really watery and light. It's a water-based formula and it's very easy to incorporate into your routine because it's so light. It layers nicely under everything else. You can use it morning or night."
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All 2 takes from Lab Muffin Beauty Science
My Skincare Routine: 2022 vs 2020
"I really love the Paula's Choice 10% Niacinamide Booster. I don't know why I stopped using it. I think I just forgot about it, and maybe I should go back to it."
Best of Paula's Choice (AD)
"This serum is the one that actually made a big difference on my skin and it made me really try out other niacinamide products. I've seen other people say the same thing, that this one is just the one that works the best for them. [...] The texture is really watery and light. It's a water-based formula and it's very easy to incorporate into your routine because it's so light. It layers nicely under everything else. You can use it morning or night."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Vitamin C

Topical vitamin C is an antioxidant with reasonable evidence for dullness and uneven tone. It breaks down in light and air, so how a product is formulated and packaged matters as much as the percentage on the front.

Source: DermNet

Niacinamide

Niacinamide has evidence behind it for redness, uneven tone and supporting the skin barrier, and it is usually well tolerated even by skin that reacts to most things.

Source: DermNet

Humectants and emollients

Ingredients like these draw water into the surface layers and slow how fast it leaves. The evidence is for comfort, softness and hydration rather than for changing the structure of the skin.

Source: DermNet

Frequently asked.

What is Paula's Choice 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid?

A lightweight niacinamide serum booster with 10% niacinamide plus mandelic and lactic acids, designed to layer into moisturizers or apply alone to address uneven skin tone, enlarged pores, and dullness.

Is Paula's Choice 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid worth it?

The gurus mostly approve it, but with enough reservations to keep it in the middle at a Guru Score of 72%.

What is Paula's Choice 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid's Guru Score?

Paula's Choice 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid holds a Guru Score of 72%. That is our read on how warmly the experts talk about it, based on the verdicts of 9 expert reviewers we have collected.

Who is Paula's Choice 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid best for?

Paula's Choice 10% Niacinamide Booster with 2% Mandelic Acid and Lactic Acid is generally suited to oily skin, combination skin and acne-prone skin.

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