Niacinamide Serum

For redness and acne-prone skin

100-day money back guarantee

Use for these skin issues

  • Redness
  • Acne-prone skin
  • Pigmentation
  • Dull skin tone

With only five clean ingredients, this serum works for anti-aging, as well as for problem skin.

Reduces the appearance of skin blemishes and congestion, for clear healthy skin.

It also reinforce the skin barrier function, improve the skin smoothness, and increase skin radiance over time.

Why Open Formula Is Better

Clinical strength
Rated "highly effective"
Minimal ingredients
Clean formula
100-day money back guarantee


50,000+ customers trust Open Formula

How niacinamide works

  • Niacinamide is vitamin B3, a potent anti-oxidant that reduce the appearance of skin blemishes and skin congestion.
  • It also improves smoothness, supports the skin barrier function, and increases radiance over time.

Why People Love Open Formula

Open Formula
Made & Shipped From USA
100-day money-back guarantee
Not tested on animals
No animal products used
Open Formula

100% Clean Formula

Safe for you and the environment

Minimal Ingredients

And fully transparent

The Formula
The key ingredients Niacinaide 5% Gluconolactone 5%
The base Water 88% 1,2-Hexanediol(moisturizer) 1% Hydroxyethylcellulose(thickener) 1%