Beauty Review: COSRX x Charlotte Cho Triple C Lightning Liquid

So I actually forgot to mention this beauty in my recent round-up of skincare things I like for a very simple reason: it’s quite easy to forget. Despite the attempts at making the packaging look luxe, and the hype that was generated prior to its release, this is not a terribly glamorous or exciting product. It’s a vitamin C serum. Like dietary sources of vitamin C (i.e., fruits and vegetables), it’s rather something you use everyday because you know its good for you, but that you don’t necessarily expect rapid, earth-shattering results from. Oh, I know it’s an acid, so it can provide exfoliation, but honestly, I use vitamin C for the long game, not the short-term.

And yet, I realized the other day that for the last month, my skin has been particularly well-behaved. No major breakouts, just one hormonal spot at the expected time, and even that has healed up rather quickly, with the marks fading nicely. And, honestly, the last thing I added to my testing routine was this serum. So go figure.

Anyway, let us back up. I bought this because it’s a touch cheaper than my current vitamin C serum, and it’s actually a low-pH, L-AA serum, so it’s made with the stuff that has the studies behind it in terms of collagen-building. I was frankly dubious about its claims of stability, so I do keep mine in the fridge, but I’ve seen only a mild color change from completely clear to ever-so-slightly-champagne colored over the last month. It certainly has a long way to go before I would consider tossing it. Compare that to the mini Drunk Elephant serum that came the color of orange blossom honey, and I’m honestly impressed.

The bottle is quite pretty. It’s a very, very deep indigo color, almost black, but with just enough color that you can see it when the fridge light shines through it just so. The gold-rimmed dropper is a nice touch. It would look lovely sitting on my vanity, if I would dare leave it out of the fridge (not specific to this serum; I store any L-AA serum in the cold). My only complaint is that there is a bit of crystallization that happens in the dropper, which did start to clog it after a few weeks, but I poked it out with a clean pin and continued on my merry way. A minor annoyance at worst.

The product itself is very watery, with an ever-so-slight “chemical” smell to it (but of course, I’m not alarmed because everything is chemicals). It feels light and refreshing on the face, with a slight amount of “slip,” but I attribute that to the fact that it is quite acidic and I find acidic things feel lightly conditioning on the skin and hair. I felt a slight tingle the first few times I use it, and now if I use it after a breakout, I might feel one or two pricks, but nothing remotely resembling “stinging.” It dries down quickly and I don’t experience any stickiness. I find it comfortable enough to not put on hydrating toner right away, so I try to give this 10-20 minutes to sit before I continue with my routine in the morning.

A note about timing usage: Soko Glam recommends using this at night because it is acidic enough to exfoliate. The fact is that AHA exfoliants cause sun sensitivity for days after application, so your level of sun sensitivity will not change whether you use it in the morning or at night. I also use a 15% lactic acid three times a week at night, so I keep this in the morning. And I like the idea of putting on antioxidants early in the day so their activity is high during peak sun hours. But that’s your choice.

Anyway, I apply it directly after my morning cleanser, which is with a low-pH cleanser, so I don’t bother with pH-adjusting toner first. I let it sit while I meditate or make matcha or gather my lunch supplies. On days when I go to the gym, I might just walk out of the house with just this on my face (if it’s humid) because I go to the gym before sunrise. Otherwise, I give it maybe 15-20 minutes of wait time and then continue with the rest of my morning routine. And, yes, I always use sunscreen during the day.

So far, with relatively generous daily usage, I’ve made it through about a third of the bottle in a month, which is about right for vitamin C. And I definitely see myself repurchasing this when I finish the bottle.

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