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Powerful-Strength Line-Reducing Concentrate, Kiehl's Original Vitamin C Serum
This facial serum contains 10.5% Vitamin C (L-ascorbic acid), the maximum recommended percentage of vitamin C for sensitive skin, along with 2% Ascorbyl Glucoside (Vitamin Cg) and fragmented hyaluronic acid, which reduces roughness and minimizes the appearance of deep wrinkles through deep hydration.
It can be used day and night, avoiding the eye area. The feeling of softness and radiance is immediate, and its antioxidant action mitigates the harmful effects of free radicals, stimulating the production of collagen and elastin.
Main Benefits
Minimizes wrinkles and deep lines
Restores radiance and improves skin texture
Long-lasting antioxidant action
Dermatologically tested, suitable for sensitive skin
Main Ingredients
Vitamin C 10.5% (L-ascorbic acid), an antioxidant that improves the appearance of aging
Vitamin Cg 2% (ascorbyl glucoside), a vitamin C derivative that is activated in the upper layers of the skin
Fragmented hyaluronic acid deeply hydrates and minimizes wrinkles
How to use:
Apply morning and/or evening before your usual treatment cream.
Avoid the eye area.
Recommendations:
Suitable for sensitive skin, alcohol-free, mineral oil-free and colorant-free.
I bought this product several months ago and I haven’t finished the bottle. I don’t think it’s bad, but at least on my combination skin, it causes quite a few breakouts due to its texture. I prefer serums with liquid formulations.
Comment made on sample product
Comment of POWERFUL-STRENGTH CASE - Translated by Google
Gender: Woman
Age: ---
Country: ES
Has been using this product for: Not specified
Skin Type:
Mixed
RAQUEL recommends this product
Elisabet
08/05/2025
For me it’s a redundant NO
I’ve been trying it for a couple of weeks now, and obviously I don’t have a clear opinion yet, but what I do know is that the texture is incredibly greasy (I have dry skin... imagine what it’s like on normal or oily skin) and very, very sticky. The feeling on my face is very unpleasant. I’m trying to use it at night because I feel bad leaving it in a drawer, given the price. I hope it’s at least miraculous! :)
Comment made on sample product
Comment of POWERFUL-STRENGTH CASE - Translated by Google
Gender: Woman
Age: ---
Country: ES
Has been using this product for: Not specified
Skin Type:
Normal
Elisabet recommends this product
César
09/04/2025
Fantastic
I’ve been using it for over 6 years. My skin is combination and sensitive. It’s the best thing I’ve ever used. I always recommend it. It might seem expensive, but you don’t need to use too much. A 75ml bottle lasts me more than 6 months. My skin looks much clearer.
Comment made on sample product
Comment of POWERFUL-STRENGTH CASE - Translated by Google
Gender: ---
Age: ---
Country: ES
Has been using this product for: Not specified
Skin Type:
César recommends this product
María Jesús
29/03/2025
Perfect!
I’ve been using it for several years and the results are incredible. I think you’ve improved the formula and especially the texture; my skin feels hydrated throughout the day after using it. It’s also worth noting that it lasts up to 6 months once opened.
Comment made on sample product
Comment of POWERFUL-STRENGTH CASE - Translated by Google
Gender: Woman
Age: ---
Country: ES
Has been using this product for: Not specified
Skin Type:
Dry
María Jesús recommends this product
Mariadelmar
06/03/2025
Luminous and silky
The texture feels silky smooth on the skin. It leaves the skin luminous and nourished. And after applying it, it feels like soft, flawless silk.
Comment made on sample product
Comment of POWERFUL-STRENGTH CASE - Translated by Google
Gender: Woman
Age: ---
Country: ES
Has been using this product for: Not specified
Skin Type:
Dry
Mariadelmar recommends this product
Elvira 34
23/02/2025
Very sticky texture
I don’t like the texture of the serum; when I applied it, I had to wash my hands several times to remove the remaining product.
Comment made on sample product
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