Powerful-Strength 12.5% Vitamin C Serum, Line-Reducing Concentrate for Face, Boosts Radiance & Firmness, Smooths & Plumps Skin, with Hyaluronic Acid, Dermatologist-Tested, Paraben-free

Works for my skin making it tighter! Packaged well! Not greasy! Expensive but works

I’m the kind of person who loves to explore different skincare products, always on the lookout for that ‘holy grail’ serum that can truly transform my skin. Over the past 10 years, while I’ve rotated countless brands—from high-end options like Sunday Riley and Dr. Dennis Gross to budget finds on Amazon—I’ve always come back to one consistent favorite: Kiehl’s Powerful-Strength 12.5% Vitamin C Serum. In the world of skincare, it's recommended to switch up your products every few months to keep your skin from adapting and becoming less responsive. This practice has led me to try everything from the surprisingly effective yet short-lived Brandefy serum (great on the first go but lost its magic by the second bottle) to La Roche-Posay, which was promising but oxidized way too quickly. Kiehl’s, however, stands out for many reasons. Its silky texture is a pleasure to use, and it boasts one of the highest concentrations of L-ascorbic acid—a hard-to-beat 12.5%! This is the gold standard for vitamin C in skincare, known for its potency and efficacy. My skin absolutely loves it. Regular use has visibly faded sun spots and smoothed out fine lines around my eyes and on my neck. I’ve seen some incredible results, and after all these years, Kiehl's Vitamin C serum remains my go-to. It’s a product I truly believe in and will continue to purchase. For anyone looking to invest in their skin, this serum is a must-try. Trust me, your skin will thank you!

Boyfriend loves this stuff. Hydrates around his eyes and keeps wrinkles at bay. Great quality ingredients. Smells nice but not perfume. Pretty expensive for the small bottle size you get but we're ok with that because it does work.

Probably the best C serum I've used other than Mad Hippie. You can feel it working with that little bit of sting. It really makes my skin feel soft and helps with fine lines and sun spots. It goes on lightly and can be used every day. No scent. Fantastic value for the price.

Works perfectly for my sensitive skin, but a bit pricey.

Recommended by my dermatologist for my aging skin. As a man I wanted something highly absorbent and non greasy. Been using it for several months and can see results especially along my forehead and neck lines. A bit expensive but you don’t need to use but a very small amount. Was hoping it would be a Black Friday sale item.

This was a bit pricey for the skin care it provided. I didn’t notice any positive skin changes. I have very dry skin, and I didn’t find it very moisturizing, certainly not for the price. It’s not a thin cream; but it’s closer to the texture of a lotion versus a cream. The smell wasn’t bad but it wasn’t a scent that I loved, either. I know that many women get good results from this cream. It just wasn’t for me and my very dry skin. The quality was good but I did think they were being very cheap to have such a small bottle cost what it did.

I love this serum. It’s not to heavy despite looking a little thick coming out of the bottle.