C20 by Wishtrend, Pure Vitamin C21.5 Advanced Serum, 30 ml, Brightening, Whitening, Skin Tone Improvement, Pure Ascorbic Acid by C2O

It's a great serum if you would like to treat hyper-pigmentation, scars, wrinkles, dark circles, acne and fine lines. I have hormonal acne and use this in my skincare regime. It definitely improved my skin by adding a healthy glow and evening out my skin texture. I've only just started dabbing a little bit around my eyes to lighten my dark circles. My only issue is I forget to use it since you have to store it in the fridge.Also I haven't had an issue with oxidisation (and I've had it for 2 months): I always keep it in the fridge inside the original box.

This is the 3rd bottle I order (in a row) the 3rd faulty! the product is all over the box inside and crusty. I cannot believe it, I ordered before and not a problem and now 3 orders that I have to return… are they just selling faulty items? Not sure what is going on..I have also reviewed the previous order… such waste of time…

I absolutely love this stuff and I think it's helping to fade my hyper pigmentation/scarring from breakouts. It doesn't make your skin lighter which is great because it means you can put it all over the face and not topically but it makes your skin look radiant and super glowy. I've only been using it for two weeks consistently every night but I definitely see a difference in my skin.After you put it on it does feel a little bit tacky, I tend to leave it for 10 - 30 minutes before applying a moisturiser or a sleeping mask and that works for me. I know most people use Vit C in the day o prefer to use it at night, whatever floats your boat really. All in all its a winner for me.

I'm in love with this product it comes on time the only problem is always damaged its my second time ordering it from Amazon but its always damaged. I will love to give it 5 stars please rectify this. That's why I'm giving it 4.

Bottle arrived and it was leaking. Considering this is Vitamin C, I doubt it is still good as it was exposed to oxygen for who knows for how long.

Ce qui m’a le plus bluffé par ce produit c’est l’effet bonne mine et un teint plus lumineux deux trois tâches ce sont estompées les grosses c’est un peu plus complexe mais ça reste un très bon produit que j’utilise matin et soir après avoir nettoyé mon visage bien sûr

Been using this for a year now. Very good and worked. Only bad point is oxidized very quicky

As a big fan of tiam/ost I decided to give this a try thinking that more vitamin c = better, right? Wrong. I use vit c for pore/blackhead control and this product did not deliver, within a month my face was back to being a clogged up mess. It also turned yellow very soon, even when it was kept in it's box and in the fridge, so it's not properly stabilized and I'm not sure it's possible to finish the bottle before it goes off. Though to be fair, it really is far less sticky and it's capable of brightening the skin somewhat, so if that's all you want it might be a decent product for you. I don't think it's worth the £34 (it was £20-ish when I bought it few months ago), I'm back to tiam.