Walk into any beauty store and you will see niacinamide and hyaluronic acid on half the serum bottles. They are often mentioned together, but they do very different jobs. Here is what each one does, who it suits, and how to use them.
This guide is based on published research and dermatology guidance, explained in plain language. It is general information, not medical advice. Read How We Research.
Hyaluronic acid: the hydrator
Hyaluronic acid is a humectant. It holds on to water and helps keep the surface of the skin hydrated, so skin looks plumper and feels less tight. Your skin naturally contains it.
- Best for: skin that feels tight or dehydrated, including oily skin that still feels dry.
- Good to know: it hydrates but does not seal moisture in. In dry winter air, apply it to damp skin and follow with a moisturiser.
- Generally well tolerated by most skin types.
Niacinamide: the multitasker
Niacinamide is a form of vitamin B3. Research suggests it can help support the skin barrier, reduce the look of redness, help with uneven tone and help regulate oil. Many studies have used concentrations around 2 to 5 percent, while some products contain 10 percent.
- Best for: oily or combination skin, visible pores, uneven tone, or a stressed barrier.
- Good to know: higher concentrations can cause stinging or flushing in some people. If that happens, choose a lower percentage.
- Results take time: think weeks, not days.
Side by side
| Hyaluronic acid | Niacinamide | |
|---|---|---|
| Main job | Hydration | Barrier support, tone, oil balance |
| Feels like | Instant plumpness | Gradual improvement |
| Best for | Tight, dehydrated skin | Oily, uneven or easily red skin |
| Watch out for | Use with a moisturiser in dry air | Possible stinging at high strengths |
Can you use them together?
Yes. They work well together and are often combined in one product. A simple order is:
- Cleanse.
- Hyaluronic acid serum on slightly damp skin.
- Niacinamide serum (or use one product containing both).
- Moisturiser.
- Sunscreen in the morning.
Which one should you start with?
- Skin feels tight and dry, especially in winter: start with hyaluronic acid plus a good moisturiser.
- Skin is oily, shiny or uneven: start with niacinamide at a moderate strength.
- Not sure: start with one product, use it for four to six weeks, then decide whether to add the other.
Add one new product at a time so you can tell what works and what irritates. For dry winter skin, also read our moisturiser comparison.
Where to shop
Many niacinamide and hyaluronic acid serums from Korean and Japanese brands are available at YesStyle. Check the ingredient list and concentration before you buy.
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