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Prequel

Lucent-C Brightening Vitamin C Serum.

Prequel Lucent-C Brightening Vitamin C Serum
Serums

About this product

A vitamin C serum with 15% L-ascorbic acid, ferulic acid, and niacinamide designed to brighten skin, reduce dark spots, and provide antioxidant protection.

Serums

The Guru Index verdict

79%

Approved

Approved · 79%
8Reviewers
6Approved
2Mixed
0Skip
#13 in Best Serums

What the gurus are saying

Gurus overwhelmingly praise this serum as an exceptional value alternative to luxury vitamin C products like Skinceuticals C.E. Ferulic, delivering similar results at a fraction of the cost. The formula is consistently lauded for feeling lightweight and absorbing quickly without stickiness or heaviness. The main drawback surfaces repeatedly: ascorbic acid serums at this pH level (3.2) can irritate sensitive or very dry skin and may cause initial purging, though reviewers suggest pushing through yields visible brightening. One recurring complaint is oxidation, with at least one reviewer reporting the serum turned brown quickly, though most found the packaging and stability adequate. The smell (often described as "hot dog water") is noted but considered minor or fleeting by most.
Synthesized from 8 expert reviews

Key actives & flags

Vitamin CNiacinamideFragrance-freeAlcohol-free

Full ingredients

Water (Aqua), Propanediol, Ascorbic Acid, Ethoxydiglycol, Isopentyldiol, Ferulic Acid, Ergothioneine, Inulin, Niacinamide, Hydroxyacetophenone, Aminomethyl Propanol, 1,2-Hexanediol, Caprylyl Glycol, Mannitol

Every take, in full

What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Approved only Skip only Mixed only Hide sponsored
Approved
"It punches well above its price point. For context, this is often compared to Skinceuticals C.E. Ferulic, which retails for around $180. The Prequel Lucent-C offers very similar core antioxidant benefits for around $23. That's a really big difference. And in my experience, it layers beautifully into your daily routine without feeling heavy or sticky. It doesn't cause irritation for most people. For mature skin dealing with sun damage, dark spots, loss of radiance, this is one of those best affordable options out there. Personally, I also love that it comes in a pump. And it doesn't smell like hot dog water like the expensive version of it. The key ingredient here is the 15% ascorbic acid, ferulic acid, and niacinamide."
All 4 takes from Dr. Aleksandra Brown
Top 10 Drugstore Skincare Products for Mature Skin That Are Actually Worth Buying
"It punches well above its price point. For context, this is often compared to Skinceuticals C.E. Ferulic, which retails for around $180. The Prequel Lucent-C offers very similar core antioxidant benefits for around $23. That's a really big difference. And in my experience, it layers beautifully into your daily routine without feeling heavy or sticky. It doesn't cause irritation for most people. For mature skin dealing with sun damage, dark spots, loss of radiance, this is one of those best affordable options out there. Personally, I also love that it comes in a pump. And it doesn't smell like hot dog water like the expensive version of it. The key ingredient here is the 15% ascorbic acid, ferulic acid, and niacinamide."
Derm Shares the Best Affordable Skincare for Your 30s
"The Prequel Lucent C Vitamin C serum, which is 15% L-ascorbic acid, provides really potent brightening effects, antioxidant protection, at a really affordable price. It can help minimize the appearance of dark spots, boost your skin's natural radiance, improve overall skin tone. I think it's suitable for daily use. It's more suitable for like your normal to combination oily skin type. If your skin is really, really sensitive or super duper dry, this one can be a little spicy because it is the original L-ascorbic acid. It's a very affordable option. The key ingredient is L-ascorbic acid 15%. Also contains ferulic acid and niacinamide."
Dermatologist's Winter Skincare Routine: AM & PM Steps for Healthy Skin | Dr. Aleksandra Brown
"I tend to alternate this last time you saw me using Prequel Lucent-C Vitamin C and I love it. If you have really dry skin or a budget friendly option might be Prequel's Lucency. The key ingredients in this one are 2% flutin, it's derived from apples and the bark of fruit trees like pear and grapefruit. The flutin helps neutralize damaging free radicals, aids in cell turnover and improves the appearance of discoloration. This also has 10% pure vitamin C, which is L-ascorbic acid. This is a very potent antioxidant. It protects against oxidative stress, brightens the skin, provides visible anti-aging benefits."
Save vs Splurge: Dermatologist-Approved Skincare Picks That Are Actually Worth It
"It delivers the same brightening antioxidant protection with the same concentration of 50% of the same active ascorbic acid. It is clinically proven to increase radiance and luminance after 4 weeks. 90% of subjects in this study agreed that their skin looked less dull. It comes in a pump and a dark container and I absolutely prefer the packaging of Lucent C over other options. If you are more worried about it spilling or you're just starting and you really want something that's more budget friendly, Lucent C is pretty darn good. When it comes to packaging, Lucent C wins hands down. The key ingredients in the Prequel Lucent C are the ascorbic acid, also has ferulic acid and niacinamide. If you're somebody who's new to this category and budget is a very important to you, I would definitely start with the Lucent C from Prequel. It has the same pure form of vitamin C, same strength, but without the luxury price tag."
Approved
"I'm going to plug my friend Dr. Sam Ellis and her brand Prequel. I think that her vitamin C serum is fantastic and it's essentially the Skin Suiticles but like updated."
All 2 takes from Mixed Makeup
Ask Me Anything: Tummy Tuck, Fat Transfer, Best Vitamin C, & Dating After Divorce | GlowLab Podcast
"I'm going to plug my friend Dr. Sam Ellis and her brand Prequel. I think that her vitamin C serum is fantastic and it's essentially the Skin Suiticles but like updated."
Skincare for Dry Skin: What to Buy for Your Morning Skincare Routine! | Beauty with Susan Yara
"It's a great vitamin C serum in my opinion, very comparable to the Skinceuticals C E Ferulic, but I also think this one's a little bit better because it's just a much better price. It has 15% ascorbic acid in it, it also has ferulic acid, so you get a little bit of that smell, but it's nowhere near as intense as the Skinceuticals one. It's very faint and it dissipates pretty quickly. Instead of vitamin E there's a different antioxidant that helps to not only keep the ascorbic acid more stable but it also helps your skin by providing more antioxidant benefits to it. There's niacinamide in here, there are so many other really nice ingredients in this serum. I just think it's great if you're looking for a traditional vitamin C serum. That said, it is at that lower pH level, so if you've experienced other classic traditional vitamin C serums and they irritated your skin, there's a chance that this one will, but it's such a good price, it's so affordable that it's always worth trying out."
Approved
"Their vitamin C serum is great. It feels really nice on the skin, which is hard to accomplish."
Approved
"I'd gone through at least like two bottles of this. I love it. I really do. I like it a lot. I did experience a purge with this when I first used it, but if you just stick with it, you get through to the other side and you look fabulous. I'm back on it and things have been going well. I like that it's nice and lightweight, but there's still like a little bit of a silk to it, so it adds like a little bit of moisture. Today I'm not really wearing a ton of makeup, but all I'm wearing for my base is this and some sunscreen."
All 2 takes from Alexandra Anele
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"The Prequel Lucent-C Brightening Vitamin C Serum is 15% L-ascorbic acid with ferulic acid and ergothioneine. The pH is 3.2, plus or minus. I started using this every day, going in full force. You use a few pumps on face and neck before all the other stuff and finish with sunscreen. I did it every single morning."
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"I'd gone through at least like two bottles of this. I love it. I really do. I like it a lot. I did experience a purge with this when I first used it, but if you just stick with it, you get through to the other side and you look fabulous. I'm back on it and things have been going well. I like that it's nice and lightweight, but there's still like a little bit of a silk to it, so it adds like a little bit of moisture. Today I'm not really wearing a ton of makeup, but all I'm wearing for my base is this and some sunscreen."
Approved
"The Prequel Vitamin C has a great price point. I love the formulation. Just reading about the ingredients and how it's created, I think this is a standout product. It's the number one most recommended vitamin C in the comment section. If you're in the US and you can get your hands on this, I would think it's worth giving it a go just based on the results that people have said."
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All 2 takes from Mad About Skin
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"The Prequel Vitamin C has a great price point. I love the formulation. Just reading about the ingredients and how it's created, I think this is a standout product. It's the number one most recommended vitamin C in the comment section. If you're in the US and you can get your hands on this, I would think it's worth giving it a go just based on the results that people have said."
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"Prequel, really love it. They have vitamin C, probably the best of their products. I would totally recommend."
~Mixed
"The prequel one turned brown really really fast so I was a little disappointed in that. Ascorbic acid based vitamin C serums have to be formulated right, they have to be in the right packaging in order for the vitamin C not to oxidize, but when it oxidizes it turns brown, and once your serum is brown it's really no good and you shouldn't use it."
All 2 takes from HotandFlashy
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"The prequel one turned brown really really fast so I was a little disappointed in that. Ascorbic acid based vitamin C serums have to be formulated right, they have to be in the right packaging in order for the vitamin C not to oxidize, but when it oxidizes it turns brown, and once your serum is brown it's really no good and you shouldn't use it."
Faves + Fails January 2024
"The Prequel Lucent-C Brightening Vitamin C Serum is derived mainly from mushrooms and on studies on skin cells in the lab it looks like it can do some of the same things that vitamin E can do such as regenerate vitamin C. This formula also contains niacinamide so you're definitely going to get a brightening of your skin with this. The Prequel vitamin C is much more of a watery liquid, will run through your fingers but you just squeeze them together tight. It does absorb really really quickly and this doesn't really leave any kind of a tack or stickiness on the surface of your skin so it rubs right in."
~Mixed
"I didn't find it to be irritating, a lot of ascorbic acid serums irritate my skin, especially ascorbic acid serums like this which have an acidic pH of 3. This one's 3.2, that 3.2 is a great pH in theory for allowing good penetration of the ascorbic acid but it can be more irritating. This product warns against using it around the eyes where the skin is more delicate, more prone to irritation. I didn't experience any irritation with this one. One of the problems with ascorbic acid if you've ever used it is that it oxidizes with time, exposure to air and light, and it can turn this orange yellow color. I did not have that issue with this product. But it does have that vitamin C serum smell. People describe it as hot dog water. The smell of the actual product is not what bothers me, but rather as I wear it throughout the day it's the way my skin smells. I can smell my face and it has that smell. If you've ever used a sunless tanner, that kind of toasty smell, I get that with ascorbic acid serums including this one."
Approved
"Prequel's vitamin C serum is more of an evolution of the Skinceuticals C E Ferulic because instead of having vitamin E, it has a different antioxidant called erathionine. It was still formulated with the same goals of giving brighter, healthier skin and it's under $25."
SponsoredFounder Conflict
All 11 takes from Dr. Sam Ellis
I Tested The World's Most Popular Vitamin C Serums — These are the Best | Dr. Sam Ellis
"Even though I love it and it is the vitamin C that I use day-to-day, we're not a global bestseller yet, so we're not talking about it in this video."
Dermatologist's Favorite Affordable Anti-Aging Skincare Products! | Dr. Sam Ellis
"My absolute favorite affordable vitamin C is from my brand Prequel and it's called Lucent-C. I truly have not seen a better, more effective vitamin C at this price point. I consider myself a true connoisseur of vitamin C, so if I was going to make or formulate a vitamin C product, I knew it had to be exceptional. It not only had to include evidence-based ingredients but also be effective as well as a joy to use, and to me that is what the Prequel Lucent-C really is. It has 15% L-ascorbic acid, which is the studied strength of L-ascorbic acid that has been proven to be the most effective. It also has ferulic acid and something called ergothioneine, which helps prevent the vitamin C from oxidizing and keeps it in its most effective form for longer. I like this serum because it's creamy. It's formulated with ceramides and so it feels a little bit more moisturizing and rich than your average antioxidant serum."
Science-Backed Skincare Dupes Saving My Patients Thousands | Dr. Sam Ellis
"Prequel's vitamin C serum is more of an evolution of the Skinceuticals C E Ferulic because instead of having vitamin E, it has a different antioxidant called erathionine. It was still formulated with the same goals of giving brighter, healthier skin and it's under $25."
Dermatologist's Anti-Aging Skincare Routine for Beginners (Morning & Night!) | Dr. Sam Ellis
"The vitamin C I'm using today is by my brand Prequel, it's called Lucent-C. There are many benefits to topical vitamin C, one being a protection factor, so it protects you against free radical damage. As your skin is assaulted during the day, these little oxygen-free radicals form in the skin and they can bump around on important structures in your skin and prematurely break them down, so vitamin C guards against that. Aside from the protective abilities of vitamin C, it also has these other benefits like brightening the skin, helping with hyperpigmentation, also helping support collagen synthesis. Anything that's going to help us make new collagen, make new structural support proteins in the skin, is going to help with anti-aging."
Dermatologist's Favorite Skincare Products of 2023! Vitamin C Serum, Sunscreens, & More
"Lucent-C is the vitamin C that I have used all year long. I'm a huge stickler when it comes to vitamin C: I want it to have good strong actives, I want it to be gentle on the skin, and I wanted it to be science backed. This has 15% L-ascorbic acid, which is the most studied form of vitamin C. The whole point of this is to fight off oxygen-free radicals, those little damaging molecules that happen over the course of the day from external factors like UV radiation and pollution as well as your normal skin cellular metabolism. Having an antioxidant in your skincare routine that consistently protects your skin is going to help with things like premature skin aging. Vitamin C is also known for helping with clarity of the skin, brightening of the skin, reduction of brown spots as well as producing collagen, which is going to make your skin less wrinkly, more plump, and just more radiant. In addition to having the 15% vitamin C, this also has something called ergothioneine, which is another type of antioxidant."
Anti-aging Skincare: When to Spend and When to Save | Dr. Sam Ellis
"When I created my brand Prequel, I knew I would want to offer an affordable vitamin C if I felt like we could do a really really good job with it, and I kind of feel like we hit our Lucent-C out of the park. I am obsessed, this is the only vitamin C I use now."
Introducing Prequel's NEW Lucent-C Vitamin C Serum | Dr. Sam Ellis
"This product has become Holy Grail in my routine. It is in my morning skincare every single day. Vitamin C stimulates collagen, which is the main structural protein in our skin that gives our skin bounce and suppleness. It also decreases collagen breakdown so there are enzymes in our skin called Matrix metalloproteinases that vitamin C can inhibit so that they aren't doing damage within the skin on a regular basis. Over time our collagen naturally wants to break down and as we get older we don't make as much collagen, so anything that we can be doing for our skin that helps us make collagen and prevent loss of collagen is going to be beneficial."
Introducing Prequel's NEW Lucent-C Vitamin C Serum | Dr. Sam Ellis
"Not only when you put this on is it not sticky, but when it dries down you just get this instant luminosity to the skin. This is fragrance-free and allergy tested and it's really been pH optimized so the pH is between 3 and 3.5, which is the perfect pH to maintain vitamin C's efficacy but also reduce any irritation that people might get from other vitamin C products. The ingredients are incredible, the formula feels so good on the skin, but I think one of the most incredible parts about this product is the price point. I am a vitamin C snob and also a vitamin C connoisseur. I have tried so many out there and I've personally paid over $150 for a bottle many times over because I was willing to do that for a great antioxidant product, but now I have this and it is $23. Having an affordable vitamin C does not compromise the efficacy or the potency or the results that you will see with this product. I like to apply this on clean skin before I apply any of my other serums or moisturizer or SPF. It's sort of the foundation or base of my morning skincare."
Introducing Prequel's NEW Lucent-C Vitamin C Serum | Dr. Sam Ellis
"This product is gentle and allows it to be used in a wider variety of skin types that may not be able to tolerate other ascorbic acid formulations. It has absolutely fantastic ingredients and is just so beautiful from a textural standpoint. I look forward to putting it on my skin every day. One issue when you formulate with ascorbic acid is that it can sometimes feel sticky or a little bit tacky on the skin, but there is none of that in this formula. It is waterweight, it is slippy and hydrating when you put it on the skin, it spreads effortlessly and then it dries down quickly without any stickiness or residue. The fact that this is a pump means I don't have to worry about throwing it in my bag or having it out on my vanity, which makes it that much more easy to use and helps me keep my product safe. When it dries down you just get this instant luminosity to the skin. This is fragrance-free and allergy tested and it's been pH optimized. The pH of this is between 3 and 3.5, which is the perfect pH to maintain vitamin C's efficacy but also reduce any irritation that people might get from other vitamin C products. The ingredients are incredible, the formula feels so good on the skin, and I think one of the most incredible parts about this product is the price point. I am a vitamin C snob and have tried so many out there. I've personally paid over $150 for a bottle of vitamin C because I was willing to do that for a great antioxidant product, but now I have this and it is $23."
Introducing Prequel's NEW Lucent-C Vitamin C Serum | Dr. Sam Ellis
"I like to take my vitamin C down my neck, my chest, definitely the backs of my hands, and if I have anything left over onto my forearms. Because this is $23, you can actually afford to use vitamin C in other places besides your face. It is incredible. It is such a beautiful compliment to anything else in your skincare routine. It is truly truly fantastic."
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"The reason I love the Prequel Lucent-C Brightening Vitamin C Serum is because it has 15% L-ascorbic acid as well as ferulic acid and another antioxidant called ergothioneine that helps stabilize the vitamin C within that formula. Not only does this make for a super effective product, but it also makes it a bit more tolerable, so for people who have sensitive skin and are interested in trying a very effective vitamin C, this is a great option. In my experience as a dermatologist, I've noticed that a lot of topical antioxidants are really expensive, so I wanted to make a product that was affordable and accessible. If you already use vitamin C and you understand the benefits that it can have on your skin, incorporating this into your routine will be amazing. If you've thought about incorporating a topical antioxidant but you've been intimidated because you're worried that it's going to cause irritation or it was out of your budget, this is a great option for you as well."
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