There’s a lot of talk on the Internet about the proper use of ingredients in skincare. And there should be! Ingredients are the nucleus of any good beauty product. Depending on the formula, they impact your skin in many ways, both good and bad. But it’s a complex world—how do you weed out facts from fallacies? One word: science. Scroll on to see one of the biggest misconceptions in skincare, debunked!


A popular rule in skincare is that Vitamin C and niacinamide shouldn’t be used at the same time. Why? Lots of reasons. It’s commonly believed that they render one other ineffective. Also, Vitamin C is extremely reactive, and too many actives at once can damage your moisture barrier! These are definitely all valid concerns.

But here’s the deal—there’s more to the chemistry than just the ingredients alone. While they can react negatively, you also have to consider temperature, time, concentration levels, and so much more.

So the question still remains: can you use Vitamin C and niacinamide together? Find out, below.


The short answer: yes, you can. Woohoo! Now, the long answer: Vitamin C and niacinamide are safe to layer because they react negatively to one another only under extreme conditions.

It’s true that niacinamide can convert into a harmful acid when combined with Vitamin C. But according to cosmetic chemist Stephen Ko in this article by The Klog, that reaction occurs only “under extreme heat over extended periods of time.” Lucky for us, these conditions would never happen during a routine application.

But wait! That’s not even the best part. In the same article, cosmetic research expert Joshua Zeichner even suggests that Vitamin C and niacinamide actually complement each other. There’s a reason why some skincare products combine them in one bottle. First, they’re both potent brightening ingredients. Second, they’re a lot more stable than people think!
Used together, Vitamin C and niacinamide work to boost radiance, smoothen out texture, and enhance skin tone. According to The Klog (which, BTW, is the official magazine of K-Beauty juggernaut Soko Glam), most misconceptions are based on outdated studies that were done 40 years ago. In other words, modern research disproves claims of their incompatibility. It’s not a bad romance, you guys!

Ultimately, it all boils down to what you like to do. So, if you have super sensitive skin and prefer not to risk it, keep using Vitamin C and niacinamide separately. Otherwise, go right ahead and pair them up. Just remember that the science behind skincare is extremely nuanced. The rules aren’t always black and white, and your mileage may vary. In the meantime, check out our Vitamin C and niacinamide faves for your layering pleasure!


1. Dear Klairs Freshly Juiced Vitamin C, now on sale at P1,010 (limited time only) — A gentle serum that lightens dark spots over time. Shop it here.
2. Innisfree Vita C Skin Clinic Mask, P115 — A concentrated sheet mask that clarifies your overall skin tone. Shop it here.
3. Neogen Bio-Peel Gauze Peeling Lemon, P1,100 — A set of exfoliating pads that buff away rough texture and erase acne scars. Shop it here.


1. COSRX Galactomyces Whitening Power Essence, now on sale at P963 (limited time only) — A lightening solution that plumps up aging skin. Shop it here.
2. It’s Skin Power 10 Propolis Effector, now on sale at P580 — A featherlight serum that rejuvenates the skin tone and heals damange. Shop it here.
3. Farmstay Grape Stem Cell Whitening Ampoule, P690 — An anti-aging remedy that boosts the production of healthier skin cells. Shop it here.