I wanted to love this product but I don't entirely hate it but, I have mixed feelings for this. First off the price is way too much for what it does, 2nd it was so irritating to sleep in. It makes it disgustingly sticky like you're literally putting hair gel on your face. The product stuck to my pillow and anything else that it touched. Tried removing excess thinking it would help but no so I just stuck it out through the night and kept it on. I couldn't sleep well at all with it on but when I did wash it off it made my face feel extremely smooth. Didn't really see any kinda of change in my skin or tone, just made me really soft. It felt like it took awhile for it to come up had to consistently wash it off with water to be sure it was all completely off. It's good to make your face really soft other than that... I think it's a product from Kiehl's you can pass because they have other products that do a way better job than this one.

I bought this product after a horrible bout of acne, and realized I had to do something about those unsightly scars. The MUA recommended this peel, and I decided to give it a go.

First off, I love Kiehl's products. They look so apothecary-like! And furthermore, the product is dispensed through a pump, and reduces any chance of contamination.

It's supposed to be non-comodogemic so I hoped it won't break out my skin.

It's goes onto the skin, leaves it feeling a little oily at first, but sinks in soon enough. It will take awhile to sink in though. I usually put it an hour before I go to bed so that it won't go all over my pillow.

The next morning, I washed it off and I was SOLD! My skin was fresh, supple, and looked brighter! I was having disgusting acne with the pus in them, and my pimple had just popped, leaving a raw and red mark. After I put the peel on, the next morning, the pimple mark looked less red. Definitely more than I expected especially after just a day. My skin looked really moisturized as well, and I didn't put any moisturizer on top of the peel. No fine lines or taut skin that I usually get in winter.

This product is a tad expensive though, and it will probably last about 4 months, give or take?

Now on to the bad. I can definitely see how it renourishes the skin. My skin looked brighter and softer after just one use. However, although it does make my marks go down, it does so at a frustratingly slow rate. This is not what I expected for given the price. So yes, to having brighter, softer, and more moisturized skin, but I'm a little dubious on the part of smaller pores + less marks. And I'm wondering if you can get a better serum that moisturizes and renourishes at this price.

I might repurchase, if there isn't anything better in the market, but this isn't as fantastic as the hype made it out to be.

what is it?
it doesnt works at all ! i already have good skin and my skin is smooth.
but when i apply this and wake up next morning thr is no effect of it..what a waste..thr is no singal effect.
i m not gonna buy it again for sure.

Awful product. I asked Kiehl's for something that would help promote the healing of some raw, dry patches of my skin that were kind of "open" and not taking makeup well. They gave me a sample of this and despite some skepticism, I gave it a go overnight last night. Now this morning, instead of better-healed patches, I have the same patches plus 15 fresh pimples all over my face which are now also on their way to raw. I felt like the salesperson who gave me the sample was really pushing it as well - I was skeptical that this was not the right stuff, but she wouldn't suggest anything else, so I deferred to her supposedly superior knowledge. Never again. So not only did the product completely backfire for me, I felt like the advice I got from the sales counter consisted of her totally not listening to what I actually wanted.

This has become a staple in my skincare routine since I discovered it last summer. I saw immediate improvement in my skin tone with brightness, evenness and smoothness. It is very mild and does not irritate my sensitive skin, even after using it multiple times per week. I have been using a 15% gycolic toner which seems to work well but nothing has given me the clearness or brightness in skin tone that this has. The stickiness is definitely not the most pleasant thing but is not enough to deter me from using this product, based on the great results. I hope it continues to work just as well and keep my skin clear.

I have been fortunate to acquire Over-Night Biological Peel for 20 USD (53% off the original price) because the store was closing.
My impressions are that it is a decent potent product. It did make my face soft and decrease the size of pores. The Peel gave me several breakouts on a nose-chin area and forehead and slightly aggravated apples of cheeks.

I would buy this product again, but wish it was a little cheaper! I use this a couple of times a week, but will especially use it the night before an evening out - say use it Friday night, go out Saturday. It really does smooth the skin, and gets rid of any flakiness. I also find that my make up goes on extra smoothly if I've used this the night before. It is difficult to see how much you have left but I suspect I have lots left and I've been using it for 6 months. It does say it has a 12 month shelf life but at this price (over £30) I'm going to keep on using it til I've run out, and hope that once it's over the 12 months it'll still be ok. I have lots of old acne marks and think this helps with the appearance of them. Kiehls are very generous with samples so I would advise asking for one of this product.

I really like this product minus the sticky feeling. My skin feels hydrated and soft the morning after. It doesn't sting my sensitive skin and I actually see a reduction of pore size. The bottle lasts you a while since you only need to apply the peel once a week.

I got this as a sample. I thought it was quite bad.

First off, the directions say to apply to skin and allow to dry (thereby implying that it WILL dry on the skin). Not only did this product have a very strong ammonia odor (I was imagining that I was apply ammonia-based hair color to my face!)....but the product never fully dries on the skin. It left a semi-moist film on my skin and I thought 'if I am supposed to put this on at night and then go to bed with this on my face, and this is some kind of a 'peel' with a strong ammonia odor, AND it has remained moist on my skin, this doesn't sound good'.

I was imagining that when I slept in bed, the still-moist lotion would rub on my pillow, then as I moved my face the 'peel' ingredients might get near my eyes (bad!) and/or the lotion will likely rub off on my pillowcase and mess it up, etc.

So I decided to at least leave a bit of the lotion on by simply patting my face with a kleenaxe to remove the excess liquid. And even then, there was STILL a bid of residue on my skin.

I awoke the next morning, and ZERO improvement in the appearance of my skin.

I've used other similar products (like Peter Thomas Roth's glycolic acid 10% hydrating gel) and saw immediate improvement. I also could 'feel' it doing something to my skin...working its magic.

With this Kiehls product? Nothing.

I don't love it or hate it, i'm very so so.

As a gel exfoliator it's great however MD formulations skin perfecting gel does the exact same for half the price and sinks iinto my skin much better than this.