Product

Paula's Choice 10% Niacinamide Booster: Dermatologist Review

Niacinamide 10% with a stable vitamin C derivative and a real soothing complex — at seven times the price of the cheap ones.

Last Updated: September 8, 2026

Dermatologist's Verdict

A well-built version of a dose higher than the evidence asks for — the pigment studies used 5%, the oil studies 2%. The soothing extras reduce the downside rather than adding an upside. Stir it into your moisturizer. If it flushes you, a 5% serum does the same work.

Strongly recommendedRecommendedMixedNot recommendedAvoid

The cheat sheetKey Facts

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Key active	Niacinamide 10% + ascorbyl glucoside
Texture	Concentrated booster serum
Best for	Uneven tone, enlarged-looking pores, sensitive skin
Approximate price	$42–$46
Fragrance	None
Essential oils	None
Drying alcohol	Phenoxyethanol
Lanolin	None

The short versionWhat It Is

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Paula's Choice 10% Niacinamide Booster is a 20 ml bottle of concentrated serum, about $42 to $46 online. It is called a booster because it is made to be used neat or stirred into a moisturizer. It is a tone and oil treatment, not a moisturizer.

The formula is niacinamide at 10 percent, a form of vitamin B3, with ascorbyl glucoside, a stable vitamin C derivative. Licorice root, beta-glucan, panthenol, carnosine and green tea sit around them to take the edge off a high dose. It is fragrance free and layers thin and clear.

Where it earns its keepWhat It Treats

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Hyperpigmentation

Works some

A dark mark forms when pigment cells hand finished pigment to the cells above them. Niacinamide slows that handover, so the mark fades as the stained cells shed. The pigment studies used about 5 percent, so the extra strength buys nothing on tone.

Oily Skin

Good fit

Oil glands respond to niacinamide by making less sebum, and sebum is the part of a wide-looking pore you can do something about. The dose here is well past the 2 percent used in the oil-control research. Give it several weeks.

Sensitive Skin

Use with care

High-dose niacinamide can tingle or flush; the licorice root, beta-glucan, panthenol and green tea are there to soften that. If your skin flushes easily anyway, a 5 percent serum is closer to what the research used.

Don't expect miraclesNot the Best For

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Melasma

Barely works

Niacinamide gets recommended for melasma. It will not hold the patches back on its own; tranexamic acid and daily sunscreen do more.

Acne

Barely works

Niacinamide calms the redness around a spot and helps with oil. It does not clear the pore, so pair it with an acne active.

Sun Damage (Photoaging)

Barely works

Niacinamide supports the barrier and there is a little vitamin C here. Neither rebuilds collagen the way a retinoid does.

How it feelsTexture

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It is a thin, clear serum that spreads further than it looks. Two or three drops cover the face.

It absorbs in under a minute and leaves no film, so it sits under sunscreen and makeup. It is fragrance free.

Some people tingle on the first few uses, which fits the concentration. The bottle is 20 ml, so cost per use is high.

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Ointment

Almost all oil, no water. Sits on top and seals.

Good for very dry, cracked or raw skin. Easiest to use at night. Too greasy for most faces during the day.

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Balm

Waxy and solid until it warms in your hands.

Good for dry patches, lips and hands. Useful in cold, windy weather. Heavy on the face.

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Cream

Thick blend of oil and water.

Good for normal to dry skin. Good in winter. May be too thick for summer.

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Oil

All oil, but spreads far thinner than an ointment.

Good layered over a moisturizer on dry skin. Sinks in faster than an ointment. Some oils clog pores on acne-prone skin.

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Lotion

Mostly water. Pours and sinks in fast.

Good for normal skin and for large areas like arms and legs. Comfortable in summer. Often not enough for very dry skin.

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Gel

Water based, no oil. Cool and slippery.

Good for oily and acne-prone skin. Good in heat and humidity. The alcohol in some gels stings broken skin.

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Serum · this one

Thin and watery. Absorbs in seconds.

Usually carries active ingredients rather than moisture. Layers under a moisturizer. Rarely enough on its own for dry skin.

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Spray

A fine mist. Barely there.

Good for the back and other spots that are hard to reach. Easy in summer. Does little for very dry skin.

The house rulesHow to Use Paula's Choice 10% Niacinamide Booster

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How much: Two or three drops on clean skin, before anything heavier.

Layering: Thin products cannot get through thick ones, so this goes before creams and oils. Stir a drop into your moisturizer if it feels strong.

If it tingles: Drop to every other day for a week or two. The 10 percent dose is the usual cause.

What to expect: Oiliness and redness ease within four to six weeks. Dark marks take eight to twelve, as stained cells shed. No purge phase.

Where It Fits in Your Routine

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Pick what fits you and the routine rebuilds around it. Paula's Choice 10% Niacinamide Booster is marked in the steps it belongs to.

This product is good for

What's insideHow Paula's Choice 10% Niacinamide Booster Works

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Niacinamide is vitamin B3, and it works on several fronts. It tells oil glands to make less sebum. It slows the handover of finished pigment to the cells above. It pushes skin to build more of its own ceramides, which is why it calms rather than stings.

The dose is where this product argues with itself. The strongest studies used about 5 percent for pigment and about 2 percent for oil, and no trial shows 10 percent does more. This one goes to 10 percent and then spends the rest of the formula softening it. Those ingredients reduce the downside of a high dose. They do not create an upside.

It also carries ascorbyl glucoside, a stable vitamin C — a quiet answer to the old claim that niacinamide and vitamin C cancel each other out.

Tap an ingredient to see where it works

In the pore

In the skin barrier

Niacinamide turns oil production down a little and interrupts pigment being handed to the cells above. The evidence for clearing spots is thin; it earns its place for the marks left behind, and for making stronger actives easier to tolerate.

The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.

The cells that make pigment. They sit along the base of the epidermis and hand melanin to the cells around them, which is what gives skin its color. Dark marks, melasma and the patch left behind by a spot are all these cells making more than usual.

A narrow tube running from the surface down into the skin, with an oil gland at the bottom of it. Oil travels up and out. When the tube blocks, what is behind it has nowhere to go — which is where blackheads and spots start.

Makes sebum, the oil that keeps the surface soft and stops water escaping. How much it makes is set by hormones, not by how often you wash — which is why scrubbing does not fix oily skin.

Cutibacterium acnes lives in the pores of everyone with skin. It is not an infection and it is not a hygiene problem. It only causes trouble when a pore blocks and it multiplies in the oil trapped behind it.

The scaffolding in the dermis that keeps skin firm and springy. It is built by fibroblasts and broken down by age, sun and smoking. Lines and looseness are collagen lost faster than it is replaced.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

Holds water in the top layers, so skin feels less tight after washing.

Pulls water into the surface and holds it there.

Draws water in and calms the surface while it does it.

The outermost layer, and the one every moisturizer is aiming at. It is dead — flattened cells stacked like bricks, with a mix of fats as the glue between them. That glue is what holds water in and keeps irritants out.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

Short list or longNumber of Ingredients

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This is how many ingredients are on the label. The more a product contains, the more chances one of them bothers you. That matters most if you have sensitive skin, eczema, or a known allergy. If your skin tolerates most things, a long list is not a problem by itself.

This product has
25 ingredients

7 ingredients

The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F

10 ingredients

Good Molecules Niacinamide 10% Serum

11 ingredients

The Ordinary Niacinamide 10% + Zinc 1%

14 ingredients

SkinCeuticals Discoloration Defense Serum

25 ingredients

Paula's Choice 10% Niacinamide Booster · this one

45 ingredients

Cosrx Peptide Serum

51 ingredients

The Ordinary Buffet

52 ingredients

Anua Dark Spot Correcting Serum

752

39 serums reviewed, from The Ordinary Ascorbyl Tetraisopalmitate Solution 20% in Vitamin F (7) to Anua Dark Spot Correcting Serum (52). Tap a dot to see which.

Full Ingredient List

Water, Niacinamide, Acetyl Glucosamine, Ascorbyl Glucoside, Butylene Glycol, Phospholipids, Sodium Hyaluronate, Allantoin, Boerhavia Diffusa Root Extract, Glycerin, Dipotassium Glycyrrhizate, Glycyrrhiza Glabra Root Extract, Ubiquinone, Epigallocatechin Gallate, Beta-Glucan, Panthenol, Carnosine, Genistein, Citric Acid, Sodium Citrate, Sodium Hydroxide, Xanthan Gum, Disodium EDTA, Ethylhexylglycerin, Phenoxyethanol

The fine printA Dermatologist’s Concerns

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The dose is higher than the evidence supports: 10% is more than the evidence asks for. The strongest studies used 5% for pigmentation and 2% for oil control. No trial shows 10% is better. The soothing ingredients reduce the downside — they do not create an upside.

May be hard to justify on price: $42 for 20 ml. The Ordinary and Good Molecules sell the same concentration for $6. You are paying for the supporting formula, and whether that is worth seven times the price is a real question.

May tingle on first use: consistent with the concentration.

The bottle is small: cost per ml is high.

What it runsPrice per Ounce

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Paula's Choice 10% Niacinamide Booster costs $78 per ounce. That is cheaper than 4 of the other 38 serums priced on Dermapedia, which run from $4.14 to $190 per ounce.

A booster is dosed in drops, so a small bottle lasts months. Cost per use is well below the per-ounce figure.

This product costs
$78 per ounce

$4.14 per oz

Cosrx Peptide Serum $4.14

$5.94–$6.00 per oz

Good Molecules Niacinamide 10% Serum $5.94

The Ordinary Niacinamide 10% + Zinc 1% $6.00

$20 per oz

The Ordinary Buffet $20

$78 per oz

Paula's Choice 10% Niacinamide Booster · this one $78

$114 per oz

SkinCeuticals Discoloration Defense Serum $114

$190 per oz

Revision C+ Correcting Complex 30% $190

$4.14$190

39 serums priced, from Cosrx Peptide Serum ($4.14) to Revision C+ Correcting Complex 30% ($190). Priced on the 0.68 oz size at $53.00. The scale is logarithmic. Tap a dot to see which. Prices current as of September 2026.

Its siblingsThe Rest of the Line

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Paula's Choice sells single actives as small bottles you layer under a moisturizer. Not a routine, a menu — and this is the mildest thing on it.

GentlestMost likely to sting

10% Niacinamide Booster

Niacinamide 10% with a stable vitamin C derivative and a real soothing complex. Rarely causes trouble.

You are here

BOOST 10% Azelaic Acid Booster

Azelaic acid in a cream texture. Redness, bumps and dark marks at the same time.

CLINICAL Niacinamide 20% Treatment

Double the niacinamide. Enough to make some faces flush.

BOOST C15 Super Booster

Pure vitamin C. The most likely to tingle.

Shop aroundSimilar Products

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Options for the same concentration at a fraction of the price, or a lower dose. What you pay for here is the supporting formula.

Tranexamic Acid 5% Serum with Niacinamide 5%

Niacinamide at 5%, the dose the landmark pigment study used, with 5% tranexamic acid, under $20. Closer to the evidence than any 10%.

We recommend more

Good Molecules Niacinamide 10% Serum

The same 10% for $6, in a nine-ingredient formula. Nothing buffers the dose.

About the same

The Ordinary Niacinamide 10% + Zinc 1%

The same 10% for $6, plus zinc PCA for oil. It pills, and nothing softens the dose.

About the same

Questions Patients Ask

Is Paula's Choice 10% Niacinamide Booster better than a 5% niacinamide product?

No trial shows that. Higher doses tingle without a clear benefit.

Can I use Paula's Choice 10% Niacinamide Booster with vitamin C?

Yes. This booster deliberately combines them.

Why does Paula's Choice 10% Niacinamide Booster cost more than cheap niacinamides?

The soothing and supporting formula around the active.

Is Paula's Choice 10% Niacinamide Booster fragrance-free?

Yes.

How do I use Paula's Choice 10% Niacinamide Booster?

Alone on clean skin, or mixed into your moisturizer.

References

Niacinamide: A B vitamin that improves aging facial skin appearanceDouble-blind RCT showing topical niacinamide (5%) improves hyperpigmentation, wrinkles, and elasticity — establishing the well-studied evidence base that the page contrasts against a 10% dose.
Influence of niacinamide containing formulations on the molecular and biophysical properties of the stratum corneumControlled study showing niacinamide reduces transepidermal water loss and increases stratum corneum thickness, supporting the claim that niacinamide is a genuine barrier-strengthening active.
Ultrasound enhanced skin-lightening effect of vitamin C and niacinamideClinical trial using ascorbyl glucoside together with niacinamide to reduce facial hyperpigmentation, supporting the deliberate niacinamide + stable vitamin C derivative pairing described on the page.
Topical vitaminsReview stating combinations of topical vitamins (including niacinamide/B3 and vitamin C) have additive effects, backing the page's point that niacinamide and vitamin C can be used together.
Topical Formulation with Niacinamide Combined with 5 MHz Ultrasound for Improving Skin Ageing: A Double-blind, Randomised, Placebo-controlled Clinical StudyRandomized placebo-controlled trial showing a topical niacinamide formulation reduced transepidermal water loss and sebum, supporting the soothing/barrier and hydration benefits attributed to niacinamide.