Kiehl's Powerful-Strength 12.5% Vitamin C Serum – Radiance, Firmness & Pore-Smoothing (3.4 oz)

Powerful-Strength Vitamin C Serum: brightening, firming, and smoothing

This potent serum combines 12.5% vitamin C activity with supporting vitamin C derivatives and Hyaluronic Acid. Formulated as a line-reducing concentrate, it targets visible signs of aging while helping maintain skin moisture. The formula is designed for all skin types and is free from parabens, alcohol, mineral oil, and dyes.

Pure Vitamin C penetrates to deeper surface layers, while Hyaluronic Acid helps keep skin hydrated for a supple feel. Dermatologist-tested and suitable for sensitive skin, the product aims to deliver a clearer, more even complexion over time. The active vitamin C can remain effective in the skin for up to six days between applications, supporting a consistent glow.

What you may notice

• Radiance boost: a brighter, more even complexion with refined texture.
• Firmness over time: subtle improvements in skin resilience and tautness.
• Pore and line appearance: smoother look and reduced visibility of fine lines.
• Deep delivery: a blend designed to reach deeper surface layers for lasting impact.
• Hydration support: Hyaluronic Acid helps the skin feel plump and comfortable.

How to use and safety

• After cleansing, apply two pumps over the entire face, avoiding the eye area.
• You may feel a gentle warmth as the formula blends into the skin.
• Dermatologist-tested and suitable for all skin types, including sensitive skin.
• Paraben-free, alcohol-free, mineral oil-free, and dye-free formula.

In as little as two weeks, you may notice brighter skin and a smoother texture, especially when used as part of a daily skincare routine that complements other products in your regimen.