Kiehl's Vitamin C Face Serum — 12.5% L-ascorbic Acid with Hyaluronic Acid, Lightweight Brightening Formula to Improve Texture & Re

Kiehl's Powerful-Strength Vitamin C Face Serum is a lightweight, daily serum that combines 12.5% pure vitamin C with hyaluronic acid to brighten skin, smooth texture, and reduce the appearance of fine lines.

This formula blends a concentrated form of L-ascorbic acid with hydrating hyaluronic acid in a stable, patented delivery so you can add a targeted antioxidant step to both morning and evening routines. Clinical testing on visible outcomes shows improvements in radiance and texture: fine lines begin to look reduced within two weeks, and longer-term use yields clearer reduction of deeper lines. The serum’s lightweight feel absorbs quickly and is designed for use before moisturizer on all skin types, including those who consider their skin sensitive.

How quickly will I see results on fine lines and texture?

Visible improvements in surface texture and radiance can be noticed shortly after starting the serum; clinical data indicate measurable reduction in fine lines within two weeks and improvement in deeper wrinkles after continued use. Individual results vary depending on skin condition and consistency of application.

• Starts improving texture and radiance soon after first applications.
• Fine lines appear diminished in about 2 weeks with regular use.
• Further reduction in deeper-set wrinkles observed by 4–8 weeks.
• Consistent morning and evening use enhances cumulative benefits.

What makes this vitamin C different from other serums?

This serum uses 12.5% pure L-ascorbic acid, a highly effective antioxidant, combined with hyaluronic acid and a patented stabilizing system that helps keep the active ingredient potent while remaining suitable for sensitive skin. The balance of concentration and formulation prioritizes efficacy without creating heavy residue on the skin.

• 12.5% L-ascorbic acid for targeted antioxidant activity and brightening.
• Hyaluronic acid delivers lightweight hydration and plumping support.
• Patented stabilization helps preserve potency over time.
• Designed to absorb quickly under moisturizers and sunscreens.

How do I add this serum to my daily skincare routine?

Use the serum twice daily after cleansing and toning and before moisturizer and sunscreen. Dispense two pumps, smooth across the face while avoiding the immediate eye area, and allow a minute to absorb before layering other products.

• Apply morning and night on clean, toned skin.
• Use two pumps and spread evenly over the face, avoiding eyes.
• Follow with moisturizer; in the morning, finish with broad-spectrum SPF.
• Patch-test first if you have a history of sensitivity to active vitamin C formulations.

Who should consider using Kiehl’s Vitamin C serum?

This serum is suitable for anyone seeking brighter, smoother-looking skin and reduction in the appearance of fine lines, including people with normal, combination, oily, dry, or sensitive skin who want a stable, potent vitamin C product. It’s a good fit for those building an anti-aging or antioxidant-focused routine and for users who prefer lightweight, fast-absorbing textures.

Who is this for: Ideal for shoppers looking to boost skin radiance, refine texture, and visibly reduce fine lines with a concentrated yet skin-friendly vitamin C serum. Safe for daily use by most skin types when introduced gradually and paired with sunscreen during daytime use.

Ingredients

Propylene Glycol, Dimethicone, Glycerin, Ascorbic Acid, Ethylhexyl Palmitate, Cetyl PEG/PPG-10/1 Dimethicone, Dimethicone Crosspolymer, Ascorbyl Glucoside, Cyclohexasiloxane, Hydroxyethylpiperazine Ethane Sulfonic Acid, Lauroyl Lysine, Acrylonitrile/Methyl Methacrylate/Vinylidene Chloride Copolymer, Polysilicone-11, Adenosine, Hydrolyzed Hyaluronic Acid, Limonene, Isobutane, Citrus Aurantium Dulcis (Orange) Peel Oil, Citrus Limon Peel Oil/Lemon Peel Oil, Citral, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate.