TO BE HONEST, I use this one as my final step after my liquid serum, I like...

TO BE HONEST, I use this one as my final step after my liquid serum, I like to use two different types of serum at night and two different serums at day time. I don't use moisturizer because I have extremely oily skin. I have been using this serum for a few months every night. I don't see many differences on my face, After I used up the first bottle, I start to use another serum, My skin becomes very irritating since I've been using Skin Ceuticals 1%retinol. I believe this serum can reduce the irritations from my retinol cream. Now, I need to review it to get my 15%off code. hahah