I didn’t realize this has niacinimide in it and it WILL make your face sting and turn red for HOURS. I am so sick of it I am using it on other parts of my body just to get rid of it. Active serum or Hydracool are way better. 

This stuff is the worst! I started breaking out so bad after using this. I took it out of my routine and cleared up. Tried adding it back in to just one side of my face and that side started breaking out horribly again! I got some of the worst, inflammatory cystic pimples with this serum. I gave it to my sister and she had the same issue happen. This may work for some people but it was absolutely a nightmare for me and my sister.

I've tried it all- this is an essential product. I've received so many compliments since I started using it.

I had used other IS Clinical products before, this is the first time I've used this particular product. Use it at night after cleansing. Runny so either put on finger to blend to face & neck or use dropper to face. Has a tingling effect on cheeks; have used for about 2 weeks & my blemishes seem to fade faster. Will review again after longer term.

I like this Serum, but the iS Clinical Active Serum works better for my skin. Absorbs easily and a little goes a long way.

I've battled rosacea, melasma, scars, acne, blackheads, inflammation, large pores... I wish I was exaggerating. This serum really does make my skin considerably calmer, smoother and brighter. Is it a cure-all? No, but it's a very important part of my regimen. I keep trying to save money, try other products & I up back where I started. No more of that. It does go on a bit sticky & takes a little extra time to soak in, but any good serum w/active ingredients that won't clog pores will have that consistency. SO, it's worth the few extra minutes for it to absorb.