Good product overall, but the pump is low quality. It takes several pumps to dispense a small amount of products, which leads it to getting quite messy.

About to purchase my second bottle. I am 48 years old. My skin is getting duller with age and I see more pigmentation. I was looking for a brightening serum that combined multiple brightening ingredients. This combines a lot! I like that it also has pure vit. C, not only derivatives. I notice my skin looks a bit more fresh and bright halfway through my first bottle. I can imagine this working on more stubborn pigmentation with longer use. My skin is getting more sensitive with age and this serum doesn’t irritate.
With my first bottle I thought it was malfunctioning. But with first use you have to press a little harder to release the vit. C from it’s separate chamber into the liquid and then shake to dissolve. Great system to give you fresh vit. C. Bottle has an airtight pumpsystem. This ticks all the boxes. It is a bit expensive. But with this I don’t need to combine different products.

It is the first time I’m using a C vit serum but I like it. There is no irritation. For more, I need to finish it and see the results.

It's been 3 weeks using this product and didn't see any difference. I'm 41 years old and my skin needs high level and concentrate vitamin C. It is not specified what percent of vitamin C it contains in the product content. So I don't think to buy it again.

Good and gives you shine post applying. Loving it.

Hab von Kiehls Vit C darauf gewechselt, nachdem ich den Inhalt von Kiehls gesehen hatte, war für mich erschreckend. Dieses Vit C ist leichte, ohne Geruch, benutze zwar seit einer Woche, brennt reizt nicht beim Auftragen. Und glaube sogar jetzt sehe ich schon aufhellenden Effekt, in dieser Kurzer Zeit schon.

i saw a significant difference after 3 weeks

Very effective product, it helps a lot also against age pigmentation problems, very nourishing, I love it. Bit expensive, but it contains high amount of Vit C, high concentration, so it is worth every penny.

At first it showed immediate effect! Made my skin supple and even. But after a while, it went downhill. Maybe i over used it? But now its somewhere in the drawer in the : will not buy again box..