Yes, for most people it is fine to use niacinamide and vitamin C in the same routine. The idea that these two cancel each other out comes from older research on pure ingredients under conditions that do not reflect how modern skincare is formulated and used. The real question is not “can you”, but “how comfortable is it for your skin”. If the combination stings, separate them by time of day.
Where the myth came from
Years ago, concerns were raised that niacinamide and vitamin C could react together and reduce each other’s benefits, or form by-products that cause flushing. Those concerns were based on conditions such as high heat over time. Today, many dermatology and cosmetic chemistry sources consider the combination acceptable for everyday skincare, and many products even include both.
That said, every skin is different. Some people find vitamin C serums tingly on their own, and adding several actives at once can be too much for sensitive skin.
Beauty of Joseon products with these ingredients
| Product | Relevant ingredient | Texture |
|---|---|---|
| Glow Serum: Propolis + Niacinamide | Niacinamide | Honey-like serum |
| Light On Serum: Centella + Vitamin C | Vitamin C | Light serum |
| Relief Sun | Rice extract, grain ferments | Light cream sunscreen |
Three ways to combine niacinamide and vitamin C
Option 1: Layer them in the same routine
- Cleanse.
- Apply the thinner serum first (usually Light On Serum).
- Wait about a minute.
- Apply the Glow Serum.
- Moisturize and apply sunscreen in the morning.
This works well for people whose skin is not reactive and who want both steps in the morning.
Option 2: Split by time of day
- Morning: Light On Serum, moisturizer, Relief Sun.
- Evening: Glow Serum, moisturizer.
This is the easiest approach for beginners and for sensitive skin. Vitamin C pairs nicely with sunscreen in the morning, and niacinamide fits easily into an evening routine.
Option 3: Alternate days
Use Light On Serum one day and Glow Serum the next. This is the gentlest option if your skin is very sensitive or you are just starting.
Which option should you choose?
| Your situation | Best approach |
|---|---|
| New to both ingredients | Option 2 or 3 |
| Sensitive or redness-prone skin | Option 3 |
| Experienced, no irritation | Option 1 or 2 |
| Very short routine | Option 2 |
What about adding alpha-arbutin?
The Glow Deep Serum uses rice and alpha-arbutin for a brighter look. You can use it in the evening while keeping vitamin C for the morning. Avoid stacking three or more brightening serums at once; it does not usually speed up results, and it increases the chance of irritation. For help choosing between brightening serums, read Light On Serum vs Glow Deep Serum and Glow Serum vs Glow Deep Serum.
How to tell if your skin is unhappy
- Stinging that lasts more than a minute.
- Redness or warmth after applying.
- New dry patches or flaking.
- Small bumps that were not there before.
If you notice any of these, go back to one active at a time. A soothing serum like the Calming Barrier Serum can help your skin feel comfortable while you adjust.
The most important partner: sunscreen
Both niacinamide and vitamin C are popular for a brighter, more even look, but without daily sun protection that effort is easily undone. Apply SPF50+ such as Relief Sun every morning, and reapply when outdoors. Our morning routine shows how to put it all together.
Tips for layering any serums
- Apply from thinnest to thickest.
- Use only two or three drops of each serum.
- Let each layer settle for about a minute.
- Introduce one new product at a time, and patch test (see our patch test guide).
Sample weekly routine with both
Here is one balanced way to use niacinamide and vitamin C across a week with Beauty of Joseon products:
- Monday to Friday mornings: cleanse, Light On Serum, moisturizer, Relief Sun.
- Monday, Wednesday, Friday evenings: double cleanse, Glow Serum, moisturizer.
- Tuesday and Thursday evenings: double cleanse, Glow Deep Serum, moisturizer.
- Weekend: keep mornings the same; on one evening, exfoliate gently and follow with the Calming Barrier Serum instead of a brightening serum.
This keeps each active in a clear slot, gives your skin rest nights, and makes it easy to identify which product is helping. Adjust the frequency down if your skin feels sensitive, or up if everything feels comfortable after a few weeks.
Where to buy in Canada
Find details and current Canadian buying options on our product pages: Glow Serum, Light On Serum and Relief Sun.
FAQ
Can I use Glow Serum and Light On Serum together in the morning?
Yes, if your skin tolerates both. Apply the thinner serum first, then the other, followed by moisturizer and sunscreen.
Does niacinamide make vitamin C useless?
This is a common myth. Current thinking is that the combination is generally fine in everyday skincare.
What if my skin flushes after using both?
Separate them by time of day or by alternate days. If flushing continues, stop and consider asking a pharmacist or dermatologist.
Should vitamin C go before or after niacinamide?
There is no strict rule. A practical approach is thinnest texture first.