
5% Niacinamide Serum
Vitamin B3 at 5% with zinc PCA
$32.00
USDStandard shipping $5.50, free over $60. Arrives in 3–5 business days. 30-day returns.
A lightweight leave-on serum with niacinamide (vitamin B3) at 5% and a small amount of zinc PCA. Niacinamide is one of the best-tolerated actives available: used daily it helps calm the look of redness, refines the appearance of enlarged pores and supports the skin barrier. The 5% level is chosen deliberately — higher concentrations offer little added benefit for most people and are more likely to irritate.
This is a supporting active, not a fast fix. Visible changes in tone and pore appearance build over weeks of consistent use, and it works best as one steady step in a routine rather than something you expect to feel working.
The formulation record
Everything in this formula, stated plainly. The same record is printed on the insert in the box.
- Ingredients (INCI)
- Aqua, Niacinamide, Glycerin, Butylene Glycol, Zinc PCA, Panthenol, Betaine, Allantoin, Sodium Hyaluronate, Pentylene Glycol, Xanthan Gum, Citric Acid, Sodium Benzoate, Phenoxyethanol
- Size
- 30 ml / 1.0 fl oz
- Net weight
- 38 g
- Texture
- Thin water-gel, absorbs matte
- Made
- Formulated and filled in the United States.
How to use
- Morning and/or evening. Apply 3–4 drops to clean skin before moisturizer.
- Layers well under sunscreen in the morning and under your night cream in the evening.
- Can be used every day; there is no need to build up slowly.
Cautions
- Patch-test before first use if your skin is reactive.
- A minority of people find niacinamide causes flushing — reduce to once daily if so.
- Keep out of the eyes.
Shipping
$5.50 standard, free over $60. 3–5 business days. Full policy
30 DAYS
Returns
Unused and in original packaging. Refunded within 5 business days of reaching us. Full policy
Questions about this product
hello@onyxskinco.storeEvery message answered within one business day.


