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Kiehl's

Ultra Pure High-potency 5.0% Niacinamide Serum

Serum

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Key ingredientsNiacinamide, Hyaluronic Acid

Ingredients

In label order. Tap one to learn what it does.

  1. 1Aqua/Water

    The base of most formulas. Dissolves everything else.

  2. 2Niacinamide

    Vitamin B3. Balances oil, refines pores, fades marks and strengthens the barrier. A true all-rounder.

  3. 3Glycerin

    A skincare MVP. Draws water into skin and supports the barrier.

  4. 4Propanediol

    Lightweight hydrator and solvent that helps ingredients absorb.

  5. 5Methyl Gluceth-20
  6. 6Hydroxyacetophenone
  7. 7Sodium Hyaluronate

    Holds many times its weight in water for plump, bouncy hydration.

  8. 8Caprylyl Glycol

    Lightweight hydrator and solvent that helps ingredients absorb.

  9. 9Carbomer

    Gives the product its texture.

  10. 10Sodium Hydroxide

    Keeps the formula at a skin-friendly pH.