After 468 Hours of Testing, These Vitamin C Serums Left Our Skin Bright and Glowy (2024)

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TL;DR

SkinCeuticals C E Ferulic is widely considered the gold standard in vitamin C serums — and we feel the hype is worth it. After six weeks, our tester’s skin looked softer, smoother, and brighter overall. We also adore the budget-friendly TruSkin Vitamin C Serum, which boosts radiance and visibly reduces dark spots, including for sensitive and acne-prone skin types.

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Benefits: Brightening, antioxidant protection, improving the appearance of fine lines and wrinkles | Skin Type: Balanced, dry, combination, sensitive | Dosage: A few drops in the morning | Size: 1 oz | Cruelty-Free: No

Since its launch in 2005, SkinCeuticals’ C E Ferulic has earned a reputation as the gold standard in the vitamin C serum category. Sometimes, the most buzz-worthy products don’t live up to expectations—but, in our view, this clinically backed formula surpasses them.

When we put this serum to the test, we noticed a marked improvement in uneven skin texture, as well as a reduction in the appearance of fine lines. After six weeks of using it, our tester’s skin looked and felt softer, smoother, and brighter. Its formula is also incredibly lightweight, quick to absorb, and doesn’t feel sticky or tight on the skin.

One thing to note: While this serum doesn’t contain fragrance, it doesn’t have a particularly appealing smell (think a mix between sweaty and metallic). However, because the scent doesn’t linger on the skin, it’s not a deal-breaker for us—plus, it’s simply so effective that we feel it’s worth it.

Read Our Full Review: We Tried SkinCeuticals C E Ferulic—And We Have Thoughts

Benefits: Radiance-boosting, helps reduce the appearance of wrinkles, helps even skin tone and texture | Skin Type: All | Dosage: 3-4 drops in the morning after cleansing face | Size: 1 oz | Cruelty-Free: No

When we tested La Roche-Posay’s Pure Vitamin C Face Serum, the first and main thing we noted was how effectively it smoothed the skin—our tester saw marked improvements in the appearance of fine lines around his mouth and on his forehead—as well as a serious boost in radiance.

We also observed that this serum absorbed quickly into the skin without any residue or stickiness. Its one drawback, in our view, was its dropper applicator. Because its consistency was on the thicker side, we thought that a pump applicator would have made the application process a bit easier—but not a game-changer, in our book.

Saleam, tester with combination skin: “I started to see some results around the two-week mark, including improvement in my skin texture and tone, as well as smoothing of smile and forehead lines. I’d say my skin is more glowy, too!”

Benefits: Radiance-boosting, firming, reduces the appearance of dark spots | Skin Type: Balanced, dry, combination, oily | Dosage: A few drops daily | Size: 1 oz | Cruelty-Free: Yes

Hyperpigmentation, acne scarring, and uneven skin texture are all common concerns, and throughout our testing, we found that Ole Henriksen’s Banana Bright Vitamin C Serum addresses them head-on. After six weeks of using this serum daily, our tester noticed a subtle fading of his acne scars and an overall brightening effect on his complexion.

We were also pleasantly surprised by this serum’s plumping effect—it added a certain resiliency that gave the skin a healthier appearance. Although we loved the applicator (its airtight pump was a breeze to use), we wished its overall packaging was slightly less bulky and easier to throw in a smaller bag.

Derek Deng, associate content editor with combination, acne-prone skin: “This serum is nice to apply — I love its airtight pump, lightweight texture, and glass skin-like finish. Overall, it does exactly what it claims: brightening and plumping the skin.”

Benefits: Radiance-boosting, improves the appearance of dark spots and fine lines | Skin Type: All | Dosage: A few drops daily day or night | Size: 1 oz | Cruelty-Free: Yes

More than anyone, those with sensitive skin know just how important it is to find products that are both gentle and effective. TruSkin’s budget-friendly vitamin C serum is just that. In our six-week testing process, we found that this product was comfortable and non-irritating for both sensitive and acne-prone skin types. While it took about 30 seconds to dry, which is slightly longer than some other options, it had a dewy finish without any greasiness or stickiness. We even noted that we could get away without applying a moisturizer on top of it, and our skin still felt hydrated. Another bonus? It didn’t clog pores—a plus for oilier and acne-prone types, in particular.

As for after the testing period? Our tester’s post-acne marks looked noticeably lighter, and her complexion looked radiant. Overall, we were very impressed—it imparted significant results at an ultra-affordable price.

Benefits: Helps improve skin tone, radiance, elasticity, and firmness | Skin Type: Normal, dry, combination, oily | Dosage: A few drops daily | Size: 1 oz | Cruelty-Free: No

We can’t say enough about the glow-boosting effects of this Paula’s Choice vitamin C serum.After six weeks of testing, we noted a major boost in radiance. Plus, this serum softened our tester’s skin and reduced the appearance of pores, which was a very pleasant surprise.

We also thought this serum absorbed beautifully; its lightweight texture didn’t leave a cast or greasy finish. Also, when our tester used this product on sensitive skin, she noted that it didn’t cause any irritation, redness, or rashes, nor did it have any negative reactions with the other products in her routine.

While we didn’t have any issue with the way it smells, it’s worth noting that some online reviewers found that it has a bit of an unpleasant smell.

Náosha, tester with oily, sensitive skin: “My skin is glowing, and its texture has become softer, too. I’d definitely buy this product with my own money!”

Benefits: Boosts radiance, evens skin tone, and helps diminish signs of premature aging | Skin Type: All | Dosage: 2 pumps each morning | Size: 1 oz | Cruelty-Free: Yes

When we tested Sunday Riley’s C.E.O 15% Vitamin C Brightening Serum, we were most impressed with its hydrating effects on the skin. Its creamy, almost lotion-like texture absorbed quickly without any sticky residue, and even upon first application, it imparted a slight glow and a plump, bouncy feel. We also observed that it helped smooth the appearance of fine lines, and that, even though it had a slightly thicker texture, it layered seamlessly under other products, sans any pilling or irritation.

We did notice that its radiance-boosting and brightening capabilities were less pronounced than other options on this list, but if a vitamin C serum with hydrating benefits is the goal, reach for this one.

Shannon Bauer, associate editorial director with combination/oily skin: “Overall, I liked this vitamin C from the first use—I found it provided a bit of hydration and that it layered well underneath other products.”

Benefits: Increases antioxidant protection, Smoothes and calms skin, Improves the appearance of fine lines | Skin Type: All | Dosage: 3-4 drops daily | Size: 1 oz | Cruelty-Free: Yes

Because a vitamin C serum lands smack in the middle of a daily skincare routine, a tacky finish can be a buzz-kill when layering it underneath other products. We were pleasantly surprised by the consistency and texture of iS Clinical’s serum—it has a lightweight, slightly viscose texture that dried quickly and seamlessly without any stickiness.

Over the course of the six-week testing period, our tester noted that this serum’s results were gradual but noticeable by the end; her skin looked dewier, and fine lines around her eyes and mouth appeared less pronounced. However, since this product has a higher price point than many other options on this list, it may be possible to attain equal or more noticeable results for less.

Aemilia, tester with dry skin: “Overall, the changes [while using this formula] were very subtle; it was more of a slow and steady shift over the testing period. But now, my skin looks dewier, and the fine lines around my eyes and mouth are somewhat less pronounced.”

Benefits: Helps improve skin tone and reduce the appearance of dark spots | Skin Type: All | Dosage: A few drops daily | Size: 1.01 oz | Cruelty-Free: Yes

When we tested South Korean brand Innisfree’s vitamin C serum, one of the first things we noticed was its lightweight, smooth feel on the skin. Our tester found that, after each use, his complexion looked fresher and hydrated and that it layered impeccably with the other products in his routine, including underneath his usual moisturizer, sunscreen, and makeup. No pilling, here!

Throughout the six-week testing period, our tester noted that this product left his skin looking glowy and radiant; he even received compliments from friends about how healthy his skin looked. However, he also observed that it didn’t brighten dark spots on the skin as effectively as other formulas, so if this is a chief concern, we recommend other options on this list instead.

Alfredo, tester with combination/sensitive skin: “I replaced my previous vitamin C serum with Innisfree and used it every morning; it left my skin looking dewy but not greasy. I received compliments about how healthy my skin looked during the testing period!”

FAQ

• What does vitamin C serum do?

  According to Dr. Herrmann, vitamin C has three main functions: It protects against environmental stressors and free radicals, an antioxidant benefit that slows signs of aging and reduces damage overall; it promotes collagen production, giving skin more support and structure; and finally, it can help work to even the skin tone and fade hyperpigmentation.

• When should you apply vitamin C serums?

  There has been much debate about whether it’s better to use the ingredient to protect skin during the day or replenish it at night, but Dr. Herrmann says you can choose which time of day to apply—just be consistent. If you do apply it in the morning, make sure to finish your routine with a facial SPF, as well.

• How should you apply vitamin C serums?

  Dr. Herrmann recommends applying your serum after cleansing. Additionally, avoid using it at the same time as certain other active ingredients like benzoyl peroxide. For example, if you use a benzoyl peroxide product at night, it’s best to apply your vitamin C serum in the morning.

• How often should you apply vitamin C serums?

  According to Dr. Herrmann, you should apply vitamin C serum either daily or every other day, depending on your routine and desired results. If you already alternate several other actives, you might apply it every other day; if you’re looking to dramatically fade hyperpigmentation, you may want to use it daily.

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