This is a pretty good serum. It’s gentler than other serums that are mostly vitamin C and it sinks in pretty quickly. I like using it in the morning before my sunscreen. I don’t think it’s made a huge difference in my skin yet, but it does look healthier when using it.

I tried this after trying the C E Ferulic and hating it. This iS Clinical vitamin C is better than Skinceuticals, however I still didn’t love it. It has a very watery consistency (which is better than C E Ferulics stickiness) and doesn’t have as strong of a nasty bbq smell.  Both still clog my pores and this one is more irritating to my sensitive skin. I think the problem is Vitamin C just doesn’t work for sensitive skin. 

I have extremely sensitive skin and can use very few products. This serum is on my safe list. Best of all, it works! My skin looks smoother and more refreshed. It really helps with healing from blemishes and irritation. I use it every single morning. I'm non my third bottle.

i really have seen a clear difference in my skin with this product! i use it as a base before my other products!

My skin is finicky and many vitamin C serums that I have tried made my skin break out. Not so with this serum. I’m on my second bottle and think it is worth every penny. 

I had been looking for a vitamin c serum for awhile..I have seen results very soon!

I just bought my second bottle! I used my first one and then waited a bit because of the price but ended up deciding it was worth the money. 

I was a pretty die hard Skinceuticals vitamin c user but I’d been reading about using copper peptides so decided to give this a try and found myself thinking about a week into using it, ‘wow my skin looks so clear and bright’. It definitely seems to be making a difference. For reference I’m early 30s with tan skin, occasional breakouts, prone to scarring and my skin care is focused on aging gracefully. 

Just bought this a month ago, with consistent use (and spf) this product has brightened my skin and treated old acne marks. I apply just after showering in the AM while skin is damp 

This serum worked within the first few weeks of use. My inflamed acne spots subsided and scarring started to look better. Not a miracle cure for anything, but this serum delivers the benefits it advertises.