Hi! I bought a bottle of this product on 04-10-11 at a local spa and the bottle did not work. I was counting the number of times I had to pump the nozzle and it was well over 30 times!! I was tapping the bottle and even tried pulling off the nozzle (I wasn't strong enough). I exchanged it for another bottle yesterday and it still didn't work!! :( so sad!! My boyfriend offered to pull the nozzle off, and I was about to let him, but I was afraid that it might affect the efficacy of the product, since it's purpose of being packaged in a pump is supposed to keep the air out and keep the product as effective as possible. I was hoping to be one of the lucky people who got to experience it...but I have to take it back today :( The girl who sold me the retinol at the spa said that the pump issue has been a recent problem because I asked her if the skinceuticals company was going to fix this issue ASAP!!

Hi, yes I have had this problem as well, even though my skin isn't sensitive. Make sure that the moisturizers you use do not contain AHA'a (ex. Glycolic Acid). I also can't use Clinique moisturizers bc it seems to burn my skin even during the day when i'm not using the retinol.

I have been using this stuff called "Emu" oil. Don't be scared bc of the oil. I normally would break out even mentioning oil, but for some reason this stuff is great! It also, doesn't burn and really adds moisture.

If you don't want to use that stuff, get something for sensitive skin with very few ingredients. Good luck!

I'm not a doctor, just a consumer who also uses Retinol 1.0. For the first two months of use, I had a lot of peeling...I mean a LOT. I started out using Retinol every night, which wasn't wise, but I didn't let the massive flaking stop my usage. I kept thinking, "It will be gone tomorrow," while brushing off my clothing and anything within 5 feet of me. I continued to turn myself into a human lizard for almost two months. After 2 months, my skin started to HURT...like it had sunburn, and it was uncomfortable to wash it even with Cetaphil. I'm used to using 20% aha cleansers, but Cetaphil was stinging my skin! I had read about all the side effects with retinol, so I figured all the peeling I had experienced was normal. However, when I didn't even want to touch my face because it was stinging so badly, and I looked like an iguana at shedding time, I finally "got" that I was hurting, not helping my skin. I stopped the retinol competely until my skin healed (about a week), and when I restarted, I cut down my application to every 4 nights, every 3 nights, then every other night, until it stopped causing peeling. Only then did I start using retinol every night. If I started to peel, I used a facial scrub and skipped the retinol till the peeling went away. (Alternating Retinol with Nia 24 really helped my skin look better in no time). A year later, I've been using Retinol 1.0 regularly without any trouble at all. I used it every night, all summer long, and now I can soak my skin with it and it's like putting nothing on my face. I definitely see the difference in the appearance and feel of my skin, for the better. Jjust start slow, and in a few months, your skin will be better than ever. :-)

Start using it maybe twice or three times a week for your skin to adjust and then start adding another day and so on until you have built it up for every night or every other night.

I can use it if the pump worked!

NO. Never use any sort of Retinol or Salicylic Acid if you are pregnant, nursing, or trying to become pregnant. Lactic Acid, however, is safe. This site carries the Belli brand, which is safe for pregnant and nursing women. Many Peptide and Vitamin C serums or creams are also safe.