Kiehl's Powerful-Strength Vitamin C serum bottle highlighting radiance potential.
Kiehl's serum pump for easy, controlled application.
Applying Kiehl's Vitamin C serum on the face for a radiant glow.
Close-up of the serum texture showing a lightweight, fast-absorbing formula.
Skin with a healthy glow after using Kiehl's Powerful-Strength serum.
Dermatologist-tested label on Kiehl's Vitamin C serum packaging.

Kiehl's

Kiehl's Powerful-Strength 12.5% Vitamin C Serum | Radiance & Firmness

High-performance beauty made for confident daily results

$109.51

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Why customers choose Oseila Beauty

Discover a bright, smooth complexion with Kiehl's Powerful-Strength 12.5% Vitamin C Serum

This dermatologist-tested concentrate blends a high-strength Vitamin C complex with skin-supporting hydrators to help unleash a healthy-looking glow. The formulation centers on a potent Vitamin C blend paired with Hyaluronic Acid to deliver a lightweight, refreshing feel that dries down cleanly and layers well with other skincare steps.

Key benefits and ingredients

  • High-strength Vitamin C formulation (12.5%) designed to brighten the complexion and support a more radiant appearance.
  • Hy­­aluronic Acid delivers hydration and a plump, smoother look for the surface of the skin.
  • Active vitamin C forms include L-ascorbic acid and Ascorbyl Glucoside, creating a synergy that works across skin texture and tone.
  • Dermatologist-tested and suitable for all skin types, including sensitive skin, with a focus on comfort and safety.

With continued use, you may notice a firmer feel to the skin and a diminished appearance of fine lines and pores, along with a more even texture. The serum penetrates to deeper layers and is formulated to remain active for several days, contributing to a consistent glow between applications.

How to use

  • After cleansing, dispense two pumps and sweep over the entire face, avoiding the eye area.
  • As the formula blends into the skin, you may feel a gentle warmth as it activates; this is normal.
  • Follow with your moisturizer and sunscreen during the day.

What to expect in everyday routines

Many users report visible improvements in radiance and texture within two weeks. While individual results vary, the combination of Vitamin C and Hyaluronic Acid is designed to support a refreshed, vibrant look as part of a balanced skincare routine.

In practice, this serum works well as an energizing step in both morning and evening routines, layering smoothly with serums and creams. Its lightweight texture makes it suitable for frequent use without heaviness, aiding in a comfortable skincare experience that fits into busy days or quiet evenings alike.

FAQ

Q: What skin concerns does Kiehl's Powerful-Strength 12.5% Vitamin C Serum address?

A: It targets brightness, a firmer look over time, and the appearance of fine lines and pores.

Q: How do I use this serum for best results?

A: After cleansing, apply two pumps over the face, avoiding the eye area; blend gently and follow with moisturizer.

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