Pure Vitamin C10 Serum.

"This product costs £45. This did not do very well. The negatives are that it's got 12% ascorbic acid. This is a worst for skin of color. The fourth ingredient in here is denatured alcohol. That's why you're getting very quick dry feel. This is a problem. Denatured alcohol leads to premature aging and because it generates free radicals in the skin, the exact opposite of what the vitamin C is trying to do. So, this is ridiculous. They also add in fragrance and that's what that beautiful smell is. If something's smelling lovely, it's a problem for our skin because don't forget 3 to 4% of the population gets contact dermatitis from fragrance. And for skin of color that can lead to hyperpigmentation. So for me, this product is a disaster."

"Their serums collectively are hands down some of the worst formulated in the industry. I think one of their worst serums though is their vitamin C specifically because they added color to it recently. This is a bit of a shady move because lots of people online were complaining that the product was coming oxidized. Vitamin C needs to be fresh. It oxidizes quickly. When it oxidizes, it turns like a yellowy orangey brownish color and it's much less effective. You don't want to be using oxidized vitamin C because it just won't deliver for you. Brands obviously can't hide the fact it's oxidized because it turns that yellowy brownish color. So what do they do? They stick colorant in it and that way we can't tell. If your vitamin C is colored, it has added colorant into it. Move on."

"You lose that efficacy which is really disappointing. It's another hybrid, very fragrant hybrid serum cream. My feeling is that if you're a serum or you're a cream, and we understand the principle behind having hybrids, you get that spread but you again cancel out the benefits. Sometimes you want to wear a vitamin C and then put a moisturizer on top and you're denying people that. It's very silicone to me. You've got ascorbic acid at a very high concentration, there's glycerin which is great, then you've got denat alcohol which is a big no-no nowadays. There's no excuse for that to be so high up. Silicone, like I said, I think there's a lot of silicone in these products and if you layer them up it can be comedogenic. I know it's not listed as a comedogenic agent but it is, and also it's terrible for the environment. You've got the salicylic acid, which combination of salicylic acid and vitamin C is nice because exfoliating allows the vitamin C to penetrate nicely, and there's some good peptides in there. So they've tried really hard here with these active ingredients, I think it's pretty cool. But the hybrid formula and the silicone content are disappointing."

"This one by La Roche-Posay has 10% L-ascorbic acid in it, which is the active form, but the problem with that form for many people is it can be irritating and just be hard to tolerate. So if you have really sensitive skin or rosacea-prone skin or very dry skin, that's something to take into account. They do disclose how much is in it, 10%, and you want the vitamin C serum somewhere between 5 to 15%, so this is right there in the mix. Other key ingredients in this include salicylic acid, so it's also going to help exfoliate the skin at the same time. The packaging is in a dropper bottle format. For me personally, I don't love dropper bottle formats for vitamin C because you are going to be exposing it to air every time you open and close it, and that means it's going to break down and go bad more quickly. If you choose a vitamin C serum in a dropper bottle, you should be using this very often in your routine and using it up quickly. But if you are somebody who is only going to want to use your vitamin C a little bit more sparingly, you probably are going to want to find one that is packaged differently. This product costs $46.99."