5th & Glow / Blog / Beauty Tips & Tricks

Glowic Niacinamide Serum and the Six Actives Working Alongside It

Q: Can niacinamide and vitamin C be used together?

Yes. The old idea that niacinamide and vitamin C cancel each other out was based on outdated 1960s research using unstable forms of both ingredients. Modern formulations — including Glowic — combine stabilized L-Ascorbic Acid with Niacinamide deliberately, because together they brighten, calm, and even out skin tone more effectively than either does alone.

The most versatile ingredients featured - Niacinamide has become one of the most trusted ingredients in modern skincare, and for good reason. Also known as Vitamin B3, it is widely known for supporting stronger skin barrier, smoother texture, more even tone, and refined pores.

Niacinamide works even better when it is paired with the right supporting ingredients.

In Glowic by 5th & Glow, it is not just a niacinamide serum. It's a multi-active brightening and skin-smoothing formula that combines Niacinamide with Vitamin C, Vitamin E, Ferulic Acid, and calming skin-supportive ingredients:

• Niacinamide (Vitamin B3) — reduces visible redness, refines pores, and supports the skin barrier

• L-Ascorbic Acid — pure Vitamin C, the perfect complement to niacinamide for brightening

• Tocopherol (Vitamin E) — antioxidant that protects skin from environmental stress

• Ferulic Acid — stabilizes the actives so the formula stays effective

• Sodium Hyaluronate — deep hydration for a plumper-looking finish

• Panthenol (Pro-Vitamin B5) — works with niacinamide to calm irritation

• Sodium PCA — humectant that keeps skin soft and barrier-supported

What People Notice First

Improved skin tone and brightness. - Michelle W.

I had eye surgery months ago and it was very hard on the skin on my face. Glowic gave faster results - smoother skin, fewer patches of color spots. Wrinkles are also a little better. - Evelyn V., age 62

Read: Vitamin C Serum Before and After: Real Results from Women Over 40

Why Thousands Trust 5th & Glow

Pairing actives correctly takes formulation discipline — and 5th & Glow doesn't cut corners. Every bottle of Glowic is third-party tested, manufactured in a GMP-certified U.S. facility, and contains zero parabens, fragrance, or fillers. With over 100,000 customers and a 365-day money-back guarantee, the niacinamide-plus-vitamin-C combination has had plenty of chances to prove itself.

Shop Glowic Serum

Frequently Asked Question

Can niacinamide and vitamin C be used together?

Yes. The old idea that niacinamide and vitamin C "cancel each other out" was based on outdated 1960s research using unstable forms of both ingredients. Modern formulations — including Glowic — combine stabilized L-Ascorbic Acid with Niacinamide deliberately, because together they brighten, calm, and even out skin tone more effectively than either does alone.

What does niacinamide do for the skin?

Niacinamide (Vitamin B3) is one of the most versatile actives in skincare. It's designed to reduce visible redness and blotchiness, minimize the appearance of enlarged pores, strengthen the skin barrier against moisture loss, and even out discoloration and rough texture. Inside Glowic, it works alongside L-Ascorbic Acid and five other actives.

What's the benefit of having niacinamide and vitamin C in one serum?

Two main benefits: simplicity and synergy. You replace two separate products (and two steps) with one bottle, and you get the complementary effect of both actives — vitamin C for brightening and collagen support, niacinamide for barrier strengthening and pore refinement. The combination is designed for visibly smoother, more even-looking skin.

Is Glowic good for redness and uneven texture?

Yes. Niacinamide is specifically known for calming visible redness and refining rough or uneven texture. Combined with Panthenol (which soothes irritation) and Sodium PCA (which holds moisture), Glowic is designed to be calming on sensitive or reactive skin while still delivering active results.

How is Glowic's niacinamide different from a standalone niacinamide serum?

A standalone niacinamide serum gives you one active. Glowic gives you niacinamide alongside six other clinically supported ingredients — vitamin C, vitamin E, ferulic acid, hyaluronic acid, panthenol, and sodium PCA — in concentrations designed to work together. You get broader coverage of mature skin concerns from a single bottle.