Powerful Strength Line Reducing Concentrate - Siero viso antirughe

It’s promising

I was given this as a sample so I didn’t have enough to use for a long time, but it stuck with me. The texture is silky and absorbs quickly without feeling sticky or heavy, and it layers well under moisturizer and sunscreen. A little goes a long way, and it fits easily into a simple morning routine. Overall, a solid, well-formulated vitamin C option, make sure to hydrate after if you use topical Tretinoin also.

Best vitamin c

I have been using this vitamin C serum regularly and it really helps brighten my skin and improve texture. It absorbs well, layers nicely under moisturizer and sunscreen, and my skin looks more radiant with continued use.

Every day!

I don’t go a day without it! It really helps my skin texture!

Lightweight and fast‑absorbing

I’ve been using Kiehl’s Powerful‑Strength Vitamin C Serum, and it’s become one of my favorite steps in my morning routine. The texture is lightweight and absorbs quickly, so it layers beautifully under sunscreen. With 10.5% vitamin C (L‑ascorbic acid) and hyaluronic acid, it helps brighten my complexion, smooth fine lines, and fade dullness, giving my skin a noticeably more radiant and even tone over time. It’s strong enough to see results, yet gentle enough that my skin doesn’t feel irritated — even on days I’m also using acids or retinol in my routine. My skin looks healthier, more luminous, and smoother, and I can tell this serum really helps protect against environmental stressors too.

Helps with discoloration and uneven skin tone.

Loved this Vitamin C Serum. I have been suffering with discoloration and it has greatly improved that. I started once and day and built my way up to twice a day. So far am impressed and will repurchase

Amazing it’s my favorite Kiehls product! ♥️

Awe yeah , this is totally worth the money and even better when you can get it buy one get one for free! I’m in the sun a lot and this sedum is so addictive ! It is nice and light and feels so nice on my face. I use the oil then the serum and I can feel it working its vitamins and magic into my skin! Sometimes when I’m traveling I share some with friends and they just loose their mind like what is that? Omg love it! ♥️ it’s truly my favorite Kiehls product ! And , after a day at the beach or snorkeling and you come take a shower and put your Kiehls on it’s like getting into bed with heaven . I love it ! 💜

Worth every penny. I have dry and sensitive skin.

This product is amazing. My face is glowing and feels more tightened.

Kiehl’s Powerful-Strength Vitamin C Serum

Before using it, my skin looked dull and slightly dehydrated. After about 3–4 weeks, I noticed my skin became brighter, smoother, and more even-toned. The scent is light and not overpowering, making it comfortable to use. The bottle has a simple but solid design, and the dropper makes it easy to dispense the serum. If you’re looking for an effective vitamin C serum, I think it’s worth trying.

Awesome for my routine.

Made my skin plump and soft to the touch. I definitely felt hydrated and rejuvenated.

Great Serum

Solid serum with a nice, soft citrus smell and warmth. I like the texture too.

Reformulated - not great

It feels like there’s a new, rough ingredient in this so when I put it on, it feels like there’s sand paper on my face. Did you reformulate this product?

Don't spend more

I've been using this product for over a year to reduce fine lines and make my moisturizer more effective, after deciding that I needed to find an alternative to the very expensive med spa serum I was using. I believe that this product is nearly or as effective as the competitive product that was double the cost. 1 small bottle lasts for months, when applied according to directions.