As a skin-care ingredient, vitamin C is really hard to stabilize, so be aware that over time your product may begin to oxidize. Oxidized vitamin C becomes less effective over time and in some cases can cause a darkening or discoloration effect. Pay attention to the color of your serum—if it starts to turn orange or brown, it’s oxidized. Also, be sure to pay attention to the expiration date on your product, and know that, typically, L-ascorbic acid has about a three-month shelf life once the bottle is opened.
S**E
Slightly Oxidized
It seems that it was already a little oxidized when it arrived. As tou can see it is slightly yellow but it is meant to be clear.
A**.
Procuct was oxidized
I had to send this back as soon as I opened it and discovered it to be a dark orange color.
J**R
Vitamin C is fragile
This was recommended to me by a esthetician and a respectable spa when I received a facial. I told my dermatologist about it and she didn’t agree that it was a good product because “vitamin C “ is very fragile and there is vitamin C and there is vitamin C. I use it on the top of my hands and bought a different product for my face. Yes, there is a difference.
A**B
Excellent product
I really like the skin care line.. I have noticed improved and more refreshed looking skin since I first tried them approximately a year ago. Some I would attriyto getting new products tend to create more consistency because we just spent to money! Medical grade ingredients at an affordable price that actually show themselves in the mirror has been my experience. Also, when I ran out and stopped.. I noticed it.. that was more telling to the quality..
T**R
Not for my skin
I really wanted to love this product but my skin just turned so red and bumpy every time I used it. I had to stop.
B**P
Probably still oxidized vitamin C ?
Living in France I received it after a rather long delivery time, I put the bottle right away in my fridge but the next day, when using it, the product is light yellow, is this normal? I'm not sure, I'm going to finish the bottle but I won't buy back because I don't trust it, on the other hand it was said to be a cheaper dupe of the Skinceuticals equivante, but hey. given the Euro and taxes and supplements in delivery, it is not worth it for us French.
D**B
Too strong for sensitive skin
My face feels very hot and turns red when I use it. I washed it off and it continue and it still kept coming up through out the day.
E**Y
Great product!
Works great!
Trustpilot
4 days ago
1 month ago