Ingredient guide
Niacinamide for brighter, more even-looking skin.
A straightforward guide to the ingredient, why Signal Serum contains 2%, and what “brightening” means in cosmetic skincare.
Written by UNA
What niacinamide is
Niacinamide is a form of vitamin B3 commonly used in cosmetic skincare. It is included in formulas designed to support a brighter, more even-looking complexion and a comfortable skin feel.
Why Signal Serum uses 2%
UNA selected 2% niacinamide as one part of a multi-ingredient formula intended for consistent daily use. The finished formula—not one percentage in isolation—determines the overall product experience.
In Signal Serum, niacinamide sits alongside 200,000 ppm salmon-derived PDRN, hydration-supporting ingredients and targeted peptides.
Brightening is not bleaching
In cosmetic skincare, brightening means supporting the appearance of radiance and a more even-looking complexion. It does not mean changing a person’s natural skin color.
For persistent or changing pigmentation concerns, speak with a qualified healthcare professional.
A simpler treatment step
Signal Serum
Signal Serum combines 2% niacinamide with 200,000 ppm salmon-derived PDRN, peptides and hydration support in one daily treatment step.
$39.99
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Questions, answered
What readers often ask.
Can I use niacinamide with PDRN?
Signal Serum already combines niacinamide and PDRN in one formula. Follow the directions on the packaging and introduce new skincare products gradually.