Evidence
What the evidence shows
The Ordinary's 10% niacinamide is effective but strong. The zinc adds extra oil-control benefits, making it particularly good for acne-prone or oily skin.
Do you have oily or acne-prone skin?
This serum is specifically designed for these skin types.Have you used niacinamide before?
First-time users should start with a lower concentration.Do you have sensitive skin?
10% concentration may be too strong.
Use this section to decide
Does this advice apply to me?
Find the concern or goal closest to yours, then use the fit signal to decide how much weight to give this guide.If your goal is
ConcentrationUsually relevant- Fit signal
- Often useful
10% niacinamide
If your goal is
Key AdditionUsually relevant- Fit signal
- Often useful
1% zinc PCA
If your goal is
Best ForUse caution- Fit signal
- Limited evidence
Oily, acne-prone skin
If your goal is
ImportantDepends- Fit signal
- Possible fit
Start slowly
Research notes already in this guide
- Studies support the effectiveness of niacinamide at 2-5% concentrations.
- Evidence for 10% is less extensive but shows benefits for some individuals.
- Research supports zinc's role in sebum control.
Practical use
How to use it
Start slowly
Begin with 2-3 applications per week, then increase to daily.
Apply to clean, dry skin
Use a few drops after cleansing and before moisturizer.
Follow with moisturizer
Always apply a moisturizer after the serum has absorbed.
Safety
Side effects and cautions
- Using it daily from the start
Start with 2-3 times per week and build up gradually.
- Using it with incompatible products
Avoid using it with high-strength acids at the same time.
- Expecting immediate results
Give it 4-6 weeks to see visible improvements.
Fit
Who should be careful
- Sensitive skin
- Those who haven't used niacinamide before
Worth noting
Small details that can change the answer
- High Concentration. 10% niacinamide is a high concentration, more than the standard 2-5%.
- Zinc Function. Zinc PCA helps regulate sebum production and reduce inflammation.
- Potential Irritation. 10% niacinamide can cause irritation in some people, especially initially.
- Popularity. The Ordinary Niacinamide 10% + Zinc 1% is one of the best-selling serums globally.
The Ordinary Niacinamide is effective but strong at 10% concentration.
Start slowly to avoid irritation.
It's best suited for oily, combination, or acne-prone skin.
The zinc adds extra oil-control benefits.
Apply to clean, dry skin and follow with moisturizer.
Definition
Understanding The Ordinary Niacinamide 10% + Zinc 1%
This serum combines a high concentration of niacinamide with zinc PCA. It's designed to reduce the appearance of blemishes, control sebum production, and improve skin texture. The high niacinamide concentration makes it more potent than most alternatives.
- 10% niacinamide for barrier support and inflammation reduction
- 1% zinc PCA for oil control
- Water-based, lightweight formula
- Suitable for oily, combination, and acne-prone skin
Science
Why 10% niacinamide works (and why it can cause issues)
Studies show that niacinamide is effective at concentrations from 2% to 5%. Higher concentrations like 10% can be more effective for some people but also carry a higher risk of irritation. The zinc in this formula adds an extra layer of sebum control, making it particularly suitable for oily skin.
- Zinc PCA
- A zinc compound that helps regulate sebum production and has anti-inflammatory properties.
- Purging
- A temporary increase in breakouts when starting a new active ingredient.
Ingredient Compatibility
Ingredient compatibility with The Ordinary Niacinamide
These pair well together; use niacinamide first as a buffer.
Apply niacinamide, wait a few minutes, then apply retinol.They work well together; apply vitamin C first.
Vitamin C is best in the morning, niacinamide at night.Can increase irritation, especially with 10% niacinamide.
Use acids and niacinamide at different times of the day.Always follow with a moisturizer to lock in benefits.
Apply moisturizer after the serum has absorbed.Questions
Frequently asked questions
Is The Ordinary Niacinamide good for sensitive skin?
The 10% concentration can be too strong for sensitive skin. Start very slowly.
Can I use The Ordinary Niacinamide with retinol?
Yes, they work well together. Apply niacinamide first.
Does The Ordinary Niacinamide cause purging?
Purging is rare with niacinamide, but breakouts from formulation are possible.
How long does a bottle last?
Used daily, a 30ml bottle typically lasts 2-3 months.
References
Sources
The notes below are drawn from the evidence already cited in this guide. They are not a complete bibliography.
- Studies support the effectiveness of niacinamide at 2-5% concentrations.
- Evidence for 10% is less extensive but shows benefits for some individuals.
- Research supports zinc's role in sebum control.