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Helps with anti aging action, such as reducing 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
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.
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.
FRAGMENTED HYALURONIC ACID
This fast-absorbing form of Hyaluronic Acid is known for its ability to hold up to 1,000 times its weight in water. Acting like a sponge, it 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.
Ensure entire face is cleansed 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
For morning and evening use, post cleansing and toning and before your moisturizer
Be sure to avoid the eye area; in case of contact with eyes, rinse them immediately
Before And After Powerful-Strength Line-Reducing Concentrate
Before and After Using our Powerful-Strength Line-Reducing Concentrate
Activate youth with clinically proven results:
Instantly: Boosts radiance*
In 2 weeks: Visibly reduces fine lines*
*Results based on 8-week clinical study with 51 women
Did You Know
Did You Know?
Kiehl's is no stranger to the powers of vitamin c. 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 supercharged face and neck cream clinically proven to reduce wrinkles, even skin tone, and smooth skin’s texture.
Old priceNew price$ 102.00
PDP Section FAQs 595
Frequently Asked Questions
Answers to Your Frequently Asked Questions
Our Powerful-Strength Line-Reducing Concentrate is designed to visibly reduce the look of fine lines and deep-set wrinkles while enhancing radiance and improving skin texture over time. Formulated with Pure Vitamin C, a potent antioxidant, this serum is suitable for sensitive skin and is designed to maintain the stability of Vitamin C over time. Our water-free formula ensures the Pure Vitamin C remains stable, making it highly effective for continued use.
Vitamin C is a versatile and powerful skincare ingredient known for its ability to boost radiance, reduce the appearance of aging, and provide antioxidant protection. It is one of the most researched and trusted ingredients in skincare. Our Powerful-Strength Line-Reducing Concentrate delivers these benefits in a targeted formula, helping skin appear brighter, smoother, and healthier over time.
Our formula contains both Pure Vitamin C (L-Ascorbic Acid) and Vitamin Cg (Ascorbyl Glucoside). Pure Vitamin C is absorbed immediately into the skin and works upon contact, while Vitamin Cg is activated once absorbed into the upper layers of skin to provide long-lasting antioxidant protection. This dual-action approach ensures the benefits of Vitamin C continue over time, helping to reduce signs of aging and improve overall skin texture.
Yes, using SPF alongside our Vitamin C serum is recommended to protect skin from the harmful effects of UV rays and environmental damage. For best results, apply the Vitamin C serum before stepping outside and follow with a sunscreen, such as our Super Fluid Daily UV Defense SPF 50+.
Vitamin C is beneficial at any age. While its anti-aging properties are key for those noticing fine lines and wrinkles, it also provides antioxidant protection that can help prevent the early signs of aging. Our Powerful-Strength Line-Reducing Concentrate works to boost radiance, improve skin texture, and protect against environmental aggressors, making it suitable for use even before visible aging signs appear.
Yes, our Powerful-Strength Line-Reducing Concentrate is formulated to be gentle enough for sensitive skin, including those who are prone to acne. The addition of Fragmented Hyaluronic Acid helps to smooth and hydrate the skin while reducing the appearance of deep wrinkles. If you're new to Vitamin C serums, start with a once-daily application and build up to twice daily. If you have specific skin concerns, consult your dermatologist before use.
While this Vitamin C serum helps visibly improve skin clarity and even tone, for targeted treatment of hyperpigmentation and dark spots, we recommend using our Clearly Corrective Dark Spot Solution, which is specifically designed for such concerns.
After cleansing and toning your skin, apply 1-2 pumps of the serum, smoothing it over the face in the morning and at night before applying your moisturizer. This will help lock in the benefits of Vitamin C. To maximize results, use your Vitamin C serum twice daily as part of your skincare routine.
Start by applying the serum once a day, and then gradually build up to twice-daily use (morning and night). With regular usage, a 50ml bottle should last approximately one month. If you’re unsure about adding new products to your routine, it’s always best to consult with a dermatologist.
Since Vitamin C serums can degrade in heat and humidity, it’s important to store your serum in a cool, dry place away from direct sunlight. The dark bottle helps protect the formula from light, but to ensure maximum effectiveness, keep it out of the bathroom cabinet or any other warm, humid area.
While we ensure all of our products are safe when used as directed, Kiehl's does not specifically test on pregnant or nursing women. If you are pregnant or breastfeeding, we recommend consulting your physician for personalized advice before introducing any new skincare products into your routine.
