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A Vitamin C serum that boosts radiance, helps firm skin and visibly diminishes fine lines, wrinkles and pores for smoother-looking skin. Formulated with 10.5% L-Ascorbic Acid and renewable 2% Ascorbyl Glucoside plus Hyaluronic Acid, this patented, water-free concentrate is a Kiehl’s customer favorite.
Helps visibly reduce lines and wrinkles while helping firm skin over time
Smoothes skin’s texture and helps visibly minimize the appearance of pores
Antioxidant Vitamin C penetrates skin’s deeper surface layers and remains effective in skin for up to 6 days
Provides visible results in just 2 weeks
Dermatologist-tested for safety
Formulated for all skin types, including sensitive skin
FRAGMENTED HYALURONIC ACID
This fast-absorbing form of Hyaluronic Acid acts like a sponge and draws moisture into skin’s surface layers and expands as it absorbs. Hyaluronic Acid is known to help smooth and plump and is commonly used in skincare products intended to visibly reduce facial lines and refine texture.
PURE VITAMIN C
L-Ascorbic Acid, also known as Pure Vitamin C, is a highly efficacious antioxidant known for its ability to improve the appearance of skin aging. In addition to antioxidant protection, Pure Vitamin C is known to help boost radiance, improve texture and visibly reduce the appearance of lines, wrinkles and other signs of aging. Pure Vitamin C is also a potent antioxidant that helps protect the skin from free radical damage caused by UV rays and pollution.
VITAMIN Cg
Vitamin Cg, or Ascorbyl Glucoside, is a Vitamin C derivative that activates once absorbed into the upper layers of the skin’s surface. With antioxidant benefits, this form of Vitamin C is frequently used in anti-wrinkle skincare products to help reduce facial lines over time. The form of Vitamin C within our formula is synthesized via green science, making it a renewable ingredient.
Cleanse skin thoroughly prior to application
Apply Vitamin C serum over entire face, avoiding the eye area
As it blends into skin, you may experience a feeling of warmth as the formula activates
Apply morning and night, after cleansing and toning and before your moisturizer
Avoid the eye area; in case of contact with eyes, rinse them immediately
Before And After Powerful-Strength Line-Reducing Concentrate
Before and After
See the visible transformation of skin with consistent use of our Powerful-Strength Line-Reducing Concentrate, a dermatologist-tested vitamin C serum for face. After 8 weeks, skin looks noticeably smoother and more radiant, with a reduction in the appearance of fine lines and wrinkles. The clinical results highlight how our concentrated Vitamin C and Hyaluronic Acid formula helps improve skin tone and texture, revealing a firmer, healthier-looking complexion over time.
Results from an 8-week clinical study. Photos not retouched. Individual results may vary.
Did You Know
Did You Know?
Kiehl’s became pioneers in Vitamin C skincare when we first stabilized Vitamin C in our efficacious, water-free concentrate. Our patented Vitamin C serum is highly stable ensuring that our formula is concentrated with an efficacious amount of Vitamin C while still being suitable for sensitive skin. Within our formula, our Vitamin C penetrates skin’s deeper surface layers — up to 10 layers deep!
A 7-in-1 anti-aging cream that targets key signs of aging for visibly youthful skin from every angle.
Old priceS$ 117.00New priceS$ 93.60
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What it is and what it's good for
Frequently Asked Questions
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What does Kiehl’s Powerful-Strength Line-Reducing Concentrate do for skin?
This Vitamin C serum helps visibly reduce fine lines and wrinkles, improve skin texture, and brighten overall tone. With consistent use, Kiehl’s Powerful-Strength Line-Reducing Concentrate enhances skin radiance and helps protect against free radical damage, leaving skin smoother and more youthful-looking.
How do I apply Kiehl’s Powerful-Strength Line-Reducing Concentrate?
Apply 1–2 pumps of Kiehl’s Powerful-Strength Line-Reducing Concentrate onto clean, dry skin. Smooth it over the face, avoiding the eye area. Use it before your moisturizer and sunscreen in the morning, or before night cream in the evening, for best results.
Can I use hyaluronic acid with Kiehl’s Powerful-Strength Line-Reducing Concentrate?
Yes, Kiehl’s Powerful-Strength Line-Reducing Concentrate already combines Vitamin C and Hyaluronic Acid in one advanced formula. Vitamin C helps brighten and improve firmness, while Hyaluronic Acid hydrates and smooths skin, giving you the benefits of both ingredients without layering multiple products.
When should I use Kiehl’s Powerful-Strength Line-Reducing Concentrate?
Use Kiehl’s Powerful-Strength Line-Reducing Concentrate after cleansing and before moisturizing, either in the morning or evening. For morning routines, always follow with SPF to protect your skin.
Can I use Kiehl’s Powerful-Strength Line-Reducing Concentrate every day?
Yes, the formula is designed for daily use and delivers the best results when applied consistently. Kiehl’s Powerful-Strength Line-Reducing Concentrate helps improve radiance, reduce visible fine lines and wrinkles, and protect against oxidative stress. To further target visible wrinkles, discover our
Powerful Wrinkle Reducing range, designed to smooth and strengthen skin over time.
