Last updated: September 24, 2026
Paula’s Choice 10% Niacinamide Booster is a concentrated niacinamide serum designed to be used on its own or mixed into a moisturizer. It is usually priced around $45–50 for 20 ml, which makes it much more expensive per ml than budget niacinamide serums. It targets enlarged-looking pores, uneven tone, and dullness. This review looks at whether 10% niacinamide is the right strength for you, how this booster compares with cheaper options, and how to use it for the best results.
What is inside
The booster contains 10% niacinamide along with supporting antioxidants and soothing ingredients in a lightweight, fragrance-free base. The “booster” format means it is designed to be potent in a small amount; a few drops go a long way, and it is formulated to layer or mix easily.
How niacinamide works
Niacinamide (a form of vitamin B3) is one of the most versatile ingredients in skincare. Research supports several benefits: it helps strengthen the skin barrier, reduces the look of redness, may help regulate the appearance of oiliness, and can gradually even out tone by limiting how pigment is transferred to the surface of the skin.
Is 10% the right strength?
Much of the research on niacinamide uses 2–5%. At 10%, some people see faster or more pronounced results, especially for pores and tone. Others, particularly those with sensitive skin, may experience flushing or tingling. The table below summarises common experiences.
| Strength | Typical use | Pros | Cons |
|---|---|---|---|
| 2–5% | Daily full-face, moisturizers | Very well tolerated | Slower, subtler results |
| 10% | Targeted serum/booster | More noticeable pore and tone improvements | Occasional flushing, tingling |
| 15–20% | Specialist products | Stronger dose | Higher irritation risk with little added evidence |
What results to expect
- 2–4 weeks: skin feels more balanced; oil may look less noticeable.
- 4–8 weeks: pores can look smaller and texture smoother.
- 8–12 weeks: uneven tone and post-breakout marks look softer, especially with daily SPF.
Niacinamide will not dramatically shrink pores or erase deep pigmentation, but it makes a steady, visible difference for many people.
How to use it
- Apply two to three drops after cleansing and before moisturizer, or mix into your moisturizer.
- Use once or twice daily depending on your skin’s comfort.
- If you notice flushing, reduce to once daily or mix it into moisturizer to dilute it.
- Follow with broad-spectrum SPF 30+ in the morning.
What it pairs well with
Niacinamide works with almost everything: retinoids, vitamin C, exfoliating acids, peptides, and hyaluronic acid. It is especially useful alongside retinoids, where it can help support the barrier and reduce the look of irritation.
Who it suits
- Oily and combination skin with visible pores.
- Skin with uneven tone or lingering marks.
- People who like to customise routines by mixing boosters into moisturizers.
Who might prefer something else
- Very sensitive or flushing-prone skin, which may do better at 2–5%.
- Budget-focused shoppers, since cheaper 5–10% niacinamide serums exist.
- People already using several niacinamide products; stacking adds little benefit.
Value and how it compares
At roughly $2.25–2.50 per ml, it is premium-priced. Budget niacinamide serums often cost less than $1 per ml, sometimes with zinc added for oily skin. What you pay for here is a fragrance-free, well-formulated, low-irritation base and a booster format that makes mixing easy. Because you need only a few drops, a bottle typically lasts two to three months. If you like the brand’s other products and want a flexible booster, it is worth considering; if price matters most, a budget serum will deliver the core benefits.
Troubleshooting
If you get a warm, flushed feeling after applying niacinamide, it is usually temporary, but it can signal that the concentration is too high for your skin. Try mixing it into moisturizer, applying it on alternate days, or using a lower-strength product. If you notice breakouts, check whether other new products were introduced at the same time before blaming the niacinamide.
FAQ
Can I use it with vitamin C?
Yes. The old advice to avoid combining niacinamide and vitamin C is based on outdated studies at high temperatures. In a normal routine, they can be used together, or split between morning and evening if you prefer.
Will it help with acne?
Niacinamide can help with the look of redness and oiliness, and it supports skin that is using acne treatments. It is not a replacement for proven acne actives such as benzoyl peroxide, salicylic acid, or retinoids.
Bottom line
Paula’s Choice 10% Niacinamide Booster is a potent, flexible niacinamide serum that can visibly improve pores, tone, and overall balance. It is best for oily, combination, and uneven skin that tolerates higher-strength niacinamide. It is expensive per ml compared with budget alternatives, but its quality and mixing flexibility make it a good choice for those willing to pay for it.
