DermaDoctor Kakadu C 20% Vitamin C Serum With Ferulic Acid & Vitamin E. "Vitamin C has been used in skin care to provide free-radical protection as well as to help even skin tone and reduce the . We care for your skin, and our furry friends. Suggested Use If you know of one we should consider, please email us atcontact@byrdie.comand we will evaluate the product ASAP. 2005;125(4):826-832. As for the texture of the product, its not liquidy nor oily; rather, it almost feels like a lightweight paste. productslearn more about VCC . I saw this on a Gilt sale and figured it was a dupe for another C E Ferulic acid serum that all the dermatologists seem to love and use on themselves (I forget the name, Cosmedicine? Hungry for more? Antioxidants. Our tester with acne-prone and oily skin absolutely loved her experience testing this serum, claiming that the formula, which is suitable for all skin types, didnt contribute to breakouts; rather, it helped to improve the appearance of her skin overall. Is Kakadu Plum the Newest Must-Have Beauty Ingredient? vitamin E, another antioxidant). And if youre totally new to using vitamin C in your skincare routine, the Sephora Collection Glow + Strengthen Vitamin C Serum is a great choice for you. This high potency, lightweight serum provides an anti-aging concentrate of 20% stabilized Vitamin C enriched with Kakadu Plum, Ferulic Acid and Vitamin E. Tackles dullness + discoloration for a visibly brighter complexion. Kakadu C with 1% Retinol + 12% C Ferulic & E Complex is available in a 30 ml size for $75 and Calm Cool + Corrected Bakuchiol Retinol Alternative Serum is available in a 30 ml size for $58 at . If irritation persists, though, you should let your derm know. No less than five forms of vitamin C coalesce in the bottle, along with brightening tranexamic acid and antioxidants from guava extract and seed oil. Benefits: Builds skin proteins to visibly lift skin, smooth deep wrinkles, and even out tone & texture while restoring hydration | Dosage: 2 to 3 pumps in PM | Active Ingredients: Ferulic acid, retinol | Skin Type: All, but can be irritating for sensitive | Size: 1 oz | Byrdie Clean: Yes | Cruelty-Free: Yes. Add. Customers flock to it for a reason: Within three weeks, results are undeniable. This brand is an editor darling, and regular shoppers are just as enamored with the serum. You can also find her work in Elite Daily, MyDomaine, Thought Catalog, and more. If youre looking for a vitamin C serum that provides all the benefits of the hero ingredient as well as hydration for your skin, this is the one we recommend for you. People with acne-prone skin know that trying new skincare products can often lead to breakouts and irritation. If the serum has turned brown, return it and cease any use of it, Wang says. Kakadu C Eye Souffl, 0.5-oz. Gently smooth over skin until absorbed. "It's good for everyone" to include vitamin C in their regimen, says Arielle Nagler, MD, dermatologist at NYU Langone Medical Center. While it took about 30 seconds to dry, which is slightly longer than some other options, it dried down to a moisturizing and non-greasy finish. Some of the skin concerns these ingredients address include acne, eczema, dry skin, blocked pores, hyperpigmentation, and uneven spots. This one is excellent for that because, in addition to containing vitamin C, its also formulated with niacinamide, another ingredient known for its spot-fading capabilities. - Melissa Lekus, Melissa Lekus Skincare Consulting, For the best of the best: SkinCeuticals C E Ferulic, The skincare experts who talked to HuffPost overwhelmingly recommend, For first timers: The Ordinary Magnesium Ascorbyl Phosphate 10%, For a stable formula: Peter Thomas Roth Potent-C Power Serum, For daily use: Mad Hippie Vitamin C Serum, Though Vitamin C serums are touted as a remedy for sun spots, aging skin and a dull complexion, green beauty expert, For all-natural ingredients: 100% PURE Vitamin C Serum, For dull skin: Dr. Dennis Gross C+ Collagen Brighten & Firm Vitamin C Serum, Vitamin C is a "powerhouse ingredient," says esthetician Melissa Lekus of, For age spots: Citrix Vitamin C Pro-Collagen Brightening Serum, If your main skincare concern is reducing the appearance of age spots and other skin discoloration, dermatologist, For acne scars: Sweet Chef Ginger + Vitamin C Serum Shot, For affordability: Oz Naturals Vitamin C Facial Serum, ot all Vitamin Cs are equal, says Wang, the cofounder of, If the serum has turned brown, return it and cease any use of it, Wang says. retailers. It also helps to improve the appearance of fine lines and wrinkles. I generally like Dermadoctor but this serum really clogged my pores. Indulge your skin with one of the richest natural Vitamin C sources known on earth. Benefits: Radiance-boosting, wrinkle-reducing | Skin Type: All | Dosage: Apply a dime-size morning and evening | Size: 1 ounce | Cruelty-Free: No | Byrdie Clean: No, Improves fine lines and textures over time, While it doesnt contain fragrance, it has a naturally unpleasant scent. I generally have dry dehydrated skin and can use most products without problem. For that reason, board-certified dermatologist Jessie Cheung, MD suggests looking for a product that comes in an opaque bottlelike the SkinCeuticals CE Ferulic Serum or the Klur Brilliant Lightor have an air-tight pump dispenser. According to Dr. Herrmann, you should apply vitamin C serum either daily or every other day, depending on your routine and the result you want. 4 installments of $23.75 with Klarna Learn More about klarna_slice Learn More. Do not get into eyes. This stuff normally retails for about $95 an ounce, but you can get it at Costco for $45 an ounce, split up in two separate containers which is actually better because it keeps the stuff fresh. Around week three, our stubborn marks and inflammation from acne on our cheeks began to fade. Benefits: Brightening, antioxidant protection, improving appearance of fine lines and wrinkles | Skin Type: Balanced, dry, combination, sensitive | Dosage: A few drops in the morning | Size: 1 ounce | Cruelty-Free: No | Byrdie Clean: Yes, Improves skin texture and tone in just a few weeks. 4 star. For the best experience on our site, be sure to turn on Javascript in your browser. By clicking Accept All Cookies, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Apply to dry skin and gently massage over face twice daily. Despite having oily skin, our tester didnt feel that this formula made her face look or feel greasy, rather, it provided the necessary hydration and a bit of glow. If you need help purchasing a product directly from Allure, go to our FAQ. Item 1344769. Ferulic acid can be great for brightening your complexion overall, but if youre looking to really knock out super stubborn, target dark spots, youll want it in this formula. "I had two people ask me if I was wearing makeup today because my skin looked so glowy and bright (spoiler alert: I was just wearing this and moisturizer).". But the brand updated its formula to include super hydrating hyaluronic acid and even higher levels of vitamin C at 12.5% to deliver faster, better results. During the day I wear DermaDoctor Kakadu C 20% Vitamin C Serum With Ferulic Acid underneath Neutrogena Pure . By entering your email and clicking Sign Up, you're agreeing to let us send you customized marketing messages about us and our advertising partners. Clean + Clinical + Cruelty Free - Learn More. According to King, unless the product has been specifically formulated to blend ferulic acid with exfoliating acids (glycolic, lactic, and salicylic), dont mix the two. I love the SkinCeuticals Hydrating B5 Gel for a little extra moisture and because it . This pricey, cult-favorite is great under daily sunscreen and makeup, and can be reapplied to clean skin at bedtime, says dermatologist Tsippora Shainhouse of Rapaport Dermatology. Debra Jaliman, MD, assistant professor of dermatology at Icahn School of Medicine at Mount Sinai, tells Health via email that she recommends serums with concentrations of 10% to 15%. Lightweight and fast-absorbing, there isnt much this serum cant do, combining the two namesake ingredients with other skin brighteners for an extra hit of spot fading, specifically. (Saying we have an obsession would be putting it lightly.) The formula is packed with antioxidant-rich grapefruit and vitamin C, as well as polyhydroxy Acids (PHAs), which work to gently break down dead skin cells. Vote for your favorite beauty products now. If you already alternate several other actives, you might apply it every other day; if youre looking to dramatically fade hyperpigmentation, you may want to use it daily. C E FERULIC WITH 15% L-ASCORBIC ACID. The first is protecting against environmental stressors and free radicals, an antioxidant benefit that slows signs of aging and reduces damage overall. oily | Dosage: A few drops daily | Size: 1 ounce | Cruelty-Free: Yes | Byrdie Clean: Yes, Helps to reduce dark spots and even the complexion, Some online reviewers find the scent to be overpowering. While it doesnt have hard claims on firming benefits, we would love it if it provided a bit more of a firming benefit, especially considering that it contains marine peptides. The store will not work correctly in the case when cookies are disabled. But if you have fairly surface-level dark spots, we highly recommend incorporating a vitamin C serum into your routine because the powerful antioxidant has been known to help lighten hyperpigmentation. 3%. 5 star. 42 results. As seen in NewBeauty, Shape, Family Circle & Dr. Oz The Good Life. She also noted that her skin texture felt more even to the touch. Ingesting Vitamin C boosts the immune system and, although this helps bolster collagen and elastin production, its not targeted and works a lot slower since our body only accepts a certain amount of Vitamin C, Wang says. The formula is also foolproofit absorbs quickly, leaves the skin feeling comfortable, and layers nicely under other makeup and additional skincare products. If you struggle with dull skin, incorporating a brightening vitamin C serum into your skincare routine might be just what you need to achieve a more radiant complexion. 2016. Our Favorite Is the LOral Paris Revitalift Derm Intensives Vitamin C Serum. Another bonus? Review this. This one, in particular, is great for brightening because it leaves the skin with a glow right after application, and it helps to improve the skins radiance over time with consistent use. How customer reviews and ratings work See All Buying Options. There is limited data on this, says King. Amazon reviewers can't say enough good things about the effect on their dark spotsit's "definitely worth the price," one person wrote, especially considering a bottle lasts them at least six months. Ideally, packaging that protects the product from exposure to light and air (both of which can decrease ferulic acids stability) is best, says King. That said, theres no real consensus on whether its best worn at morning or night. Benefits: Creates potent brightening and reduces the look of dark spot size by up to 75% | Dosage: Twice a day | Active Ingredients: Ferulic acid, vitamin C, vitamin E | Skin Type: All | Size: 0.5 oz | Byrdie Clean: No | Cruelty-Free: No. Unlike many other ferulic acid serums that pair the ingredient with vitamin C (which, FYI, can be irritating, especially in higher concentrations), this instead combines it with resveratrol, a much more well-tolerated option. Packaging is functional and makes dispensing ideal amount of product easy, Doesnt leave the skin looking immediately glowy. 2017. This vitamin C booster plays well with other skincare products in your routine, although considering it contains hydrating squalane, firming peptides, and tightening caffeine, you might not need anything else. Ole Henriksen Truth Serum Vitamin C Anti-Aging Collagen Booster, Clinique Fresh Pressed Daily Booster With Pure Vitamin C 10%, Kiehl's Powerful-Strength Line-Reducing Concentrate, Glow Recipe Guava Vitamin C Dark Spot Treatment Serum, Hyper Skin Brightening Dark Spot Vitamin C Serum, DermaDoctor Kakadu C 20% Vitamin C Serum With Ferulic Acid & Vitamin E, Sunday Riley C.E.O. Though this brightening serum did a nice job of boosting the radiance of our testers skin, she didnt see an improvement in hyperpigmentation or firmness after the six-week testing period. Melanie Rud is a Chicago-based writer with 10 years of experience covering beauty. Allure may earn a portion of sales from products that are purchased through our site as part of our Affiliate Partnerships with "After two weeks, my skin looks 70% smoother and clearer," wrote a fan in their 30s. "They work to stimulate collagen, lighten dark spots, and protect against sun damage," Madfes tells Byrdie. With the sleek orange-pink bottle by their side, users say they feel "so much more confident" about their skin. 62%. Vitamin C, hyaluronic acid, and kojic acid reduce dark spots like lightning that also moisturizes everything it touches. 4 installments of $23.75 with afterpay Learn More about afterpay Learn More. Ferulic acid is a good ingredient to look out forin addition to being a potent antioxidant and containing some impressive anti-aging properties, it can help to stabilize the vitamin C. Meaning it's better for both your skin and wallet, since your bottle will stay potent for longer. In a 4-week consumer study on kakadu C 20% Vitamin C Serum, Based on a 4-week sponsored period of use by 32 female volunteers, aged 21-65. How often should you apply vitamin C serums? We supercharge each formula with powerful forms of stabilized Vitamin C for maximum free radical fighting effects. If you're a skincare fanatic, you may have already fallen in love with Sunday Riley's best-selling Good Genes serum. It leaves behind a tacky film until you layer a moisturizer on top. "Hyperpigmentation is significantly lighter, and my fine wrinkles are basically non-existent. But don't overlook the brand's vitamin C serum, which also has a huge following. Stickiness, oiliness, and fragrance for the scent-sensitive. "They work to stimulate collagen, lighten dark spots, and protect against sun damage," Madfes tells Byrdie. Rosie was previously an editorial assistant at Health Magazine, and then went on to report on health and science news at publications like IFLScience and Newsweek. Add. Finally, its a radiance-boosting agent, so a serum that features it can work to even skin tone and fade hyperpigmentation. The SkinCeuticals C E Ferulic serum earned marks from dermatologists for its ability to lighten fine lines, firm skin, provide environmental protection and brighten a dull complexion. It's all about finding a compromise between a high level of vitamin C to boost the production of collagen, but not too much that it brings on redness and irritation. Apply it in the morning to yes, reap the benefits of ferulic acid (which is combined with other antioxidants, phloretin, and vitamin C), but also to give your skin an instant lift, thanks to a unique microalgae ingredient. Also helps improve the appearance of fine lines and wrinkles. Shape Magazine Beauty Award. Apply to clean, dry skin each evening. Over time, our tester noticed a significant improvement in the radiance of her complexion, noting that after the six weeks, her skin appeared brighter and more smooth. "I could noticeably tell how much more dull my skin looked without it," one shopper wrote on the brand's website. Healthcare professionals review articles for medical accuracy. Ferulic acid is a superstar antioxidant worth knowing. Despite enjoying the results of this popular vitamin C serum, our tester had trouble recommending it because there are other more affordable options on the market that yield the same results. oz.) I had run out of my Perricone Vitamin C Ester and for some reason it was nowhere to be found in the UK (it's available again now) so I was looking for Pros: This serum really lightens hyper pigmentation post acne marks very quickly. SkinCeuticals C E Ferulic with 15% L-Ascorbic Acid Vitamin C Serum 30ml. She has been trained in general medical, surgical and cosmetic dermatology and holds an expertise in acne, rosacea, body contouring, laser rejuvenation and injectable aesthetic treatments. For the best experience on our site, be sure to turn on Javascript in your browser. Yes No About reviewer ( 272 reviews) Age25-29 SkinNormal, Fair, Neutral Targets visible signs of aging for firmer, younger-looking skin. current price $69.60. She received a Bachelor of Arts in Journalism from the University of Minnesota. Our tester also noted that she appreciated the squeeze-tube packaging, saying it made dispensing the right amount of product easy. oz. In addition to vitamin C (in the form of sodium ascorbyl phosphate at 10%), it contains glycerin and hyaluronic acid to moisturize and aloe to soothe the skin. "They're also great for fine lines, melasma, and rosacea." Vitamin C in serum form is so effective because it . Either way, youre getting plenty of good stuff, namely a powerful concentration of vitamin C, along with vitamin E and ferulic acid, the top-notch trifecta that we keep referencing time and time again. DERMAdoctor Kakadu C Serum. Its another top choice for King, who lauds it for both the chosen antioxidants it contains and their high concentrations. This stuff normally retails for about $95 an ounce, but you can get it at Costco for $45 an ounce, split up in two separate containers which is actually better because it keeps the stuff fresh. Fun fact: The SkinCeuticals one featured on this list was one of the first serums she ever used, and she still uses it to this day. A 1-ounce bottle of this stuff rings up at over $160. If you buy something through our links, we may earn a commission. vitamin C, an antioxidant that boosts collagen production and inhibits pigment formation); Kakadu fruit extract (a fruit rich in vitamin C); ferulic. This is a newer entrant to the world of vitamin C serums, but with Glow Recipe's track record, it's no wonder the formula is already garnering raves. It can help lighten pigmentation, prevents the breakdown [of collagen] and increases collagen production., Vitamin C is the most abundant antioxidant in the body fighting free radicals to slow the aging process.. productslearn more about, Byrdie takes every opportunity to use high-quality sources, including peer-reviewed studies, to support the facts within our articles. Cosmopolitan For Latinas Beauty Award Winner. Defends against free radical damage for a radiant complexion. Turns out, Vitamin C actually is the powerhouse ingredient it claims to be, says esthetician Melissa Lekus of Melissa Lekus Skincare Consulting. Since free radicals are formed by exposure to unavoidable things like UV rays and pollution, using an antioxidant serum daily gives your skin another layer of defense. This one is just that, and our tester loved it. She combined dermatologist recommended picks with insights from product testers and hours of research to compile this roundup. Antioxidants, ferulic acid included, are most definitely an anti-aging ingredient, but that benefit really gets kicked up a notch when theyre paired with the king of all youth-boosting ingredients, retinol. Choosing a formula that combines these three is one way to make sure youre getting even more efficacy from each of the ingredients on its own. It hydrates and brightens skin." Absolutely do not use if it has turned brown., Finally, take note of the type of Vitamin C in the formula. As for the results after the testing period, our tester was really pleased with them. This serum is evidence that you dont need to spend a lot of money on skincare packed with actives in order to see a positive change in your skin. Theres a good reason why both team Byrdie and dermatologists galore sing the praises of this cult classic time and time again. We asked eight skincare experts for their favorite Vitamin C serums, from expensive cult classics to affordable options under $10. 2018. . The Klur Brilliant Light is a great option that includes vitamin E. According to board-certified dermatologist Jennifer Herrmann, MD, vitamin C has three main functions. 4.0 out of 5 stars Great product but a little sticky. Just over 59,000 people declare it worth a five-star rating on Amazon, where it's the site's best-selling face serum, period. If this is not the case, Vitamin C can be very unstable on exposure to light and essentially be useless. This choice combines ferulic acid with vitamin C, plus matcha green tea (another great antioxidant) plus brightening pineapple extract. But thats not a concern here, because this has been specially formulated to ensure you get the exfoliating benefits of the ferulic acid and the lightly-exfoliating benefits of the lactic acid. In particular, she says these two increase the efficacy of vitamin C and help stabilize it. Acne scars fading. Kakadu plums have the highest amount of vitamin C of any other fruit relative to weight. It didnt do much in terms of firming the skin, but if improving radiance and skin texture is your goal, we dont think youll be disappointed with this product. You can mix it in with your moisturizer twice daily for super brightening results, which customers say show up quickly. It helped her achieve more luminous, healthy, and youthful-looking skin. If youre new to using vitamin C serum, its wise to start out with a simple formula thats effortless to use and doesnt contain potentially harsh active ingredients. oz.) 4.78 Stars 223 Reviews 223. HYDRATING B5 GEL. I've never written a review before, but this product has worked so incredibly well and so incredibly quickly that I had to share," wrote a Sephora customer of its effect on hyperpigmentation. Using fingertips, apply 2-3 drops to the entire face, neck, and chest. Pigmentation evening out. And don't worry if you notice some light tingling or redness upon your first few applicationsit's normal with the potent ingredient. Want Brighter Skin? (The fewer the ingredients, the less likely there is to be one thats irritating in there. Good skincare shouldnt be difficult to find, and we love that this extremely accessible product is more than just available in your local drugstore and relatively affordableits also highly effective. L-ascorbic acid or tetrahexyldecyl ascorbate are the most active types, says dermatologist Erum Ilyas of, what the heck does Vitamin C serum do for your skin, Perricone MDs Vitamin C Ester Brightening Serum, the best-selling Vitamin C serums at Sephora, A post shared by SkinCeuticals (@skinceuticals), cult-favorite is great under daily sunscreen, SkinCeuticals C E Ferulic Vitamin C serum, The Ordinary's Magnesium Ascorbyl Phosphate 10%, Peter Thomas Roth Potent-C Power Serum is available at Sephora, Mad Hippie Vitamin C Serum is available at Ulta, Dr. Dennis Gross C+ Collagen Brighten & Firm Vitamin C Serum, Citrix Vitamin C Pro-Collagen Brightening Serum, Oz Naturals Vitamin C Facial Serum is available at Oz Naturals. Best of all, they say results only take two weeks to appear. We supercharge each formula with powerful forms of stabilized, Each formulation is paired with a host of skin loving ingredients like. No testing on animals ever. Over time itll start to darken as it oxidizes, much like a sliced apple. Considering that its effective, non-irritating, suitable for all skin types, and doesnt contain harsh acids, we think its a great choice for people with sensitive skin. DERMAdoctor Kakadu C 20% Vitamin C Serum with Ferulic Acid & Vitamin E at Dermstore Jump to Review Best Budget: The Ordinary Resveratrol + Ferulic Acid Jump to Review Runner-Up, Best Budget: Versed Skin Restoring Serum at Revolve Jump to Review Best for Sensitive Skin: Typology 3% Ferulic Acid + 3% Resveratrol at Typology.com Jump to Review But with so many to choose from, it can be tricky to decide which one is best for you. ", Beat uneven skin tone and dullness with Drunk Elephant's vitamin C serum, another personal favorite of DeSantis. Benefits: Protects skin from the damaging effects of external aggressors that contribute to signs of aging | Dosage: Adequate amount alone or after water-based serums, before oils or heavier creams at least once a day | Active Ingredients: Ferulic acid, resveratrol | Skin Type: All | Size: 1 oz. Health's content is for informational and educational purposes only. DERMAdoctor Kakadu C 20 Vitamin C Serum with Ferulic Acid Vitamin E (1 fl. Those that scored the highest appear on this list. She has tested several vitamin C, including several on this list. It may be on the pricier side, but this powerful antioxidant serum will do wonders for your face. This contains potent antioxidants ferulic acid and coenzyme Q10 to help protect the skin from free radicals, along with a type of retinoid and glycolic acid to also help resurface the skin overnight, says King. Apply every other night for first two weeks. Sabrina Crews is a copy editor and fact checker. Kakadu C 20% Vitamin C Serum with Ferulic Acid & Vitamin E, https://www.dermadoctor.com/media/catalog/product/cache/ee38df78979386a0806191fb5d4b0924/k/k/kkc_serum.png,
This lightweight, anti-aging, high-potency, stabilized Vitamin C serum accentuated with Kakadu Plum Extract, Ferulic Acid and Vitamin E boosters helps brighten the complexion and leaves skin feeling more elastic, smoother, softer and firmer. They each evaluated one vitamin C serum during that time period based on ease of use, absorption, skin texture, skin glow, firmness, and overall look. Green tea extract helps protect the skin against free radical damage, culminating in a find that shoppers stick with for 13 years. The same brand that gave us one of our all-time favorite keratosis pilaris treatments also delivers a powerful vitamin C serum. Not only that, but she noticed a real improvement in her skin texture, saying that after the six-week testing period, her face looked and felt smoother and softer overall. Stacy Chimento, MD, is a board-certified Dermatologist currently residing in Bay Harbor Islands, FL. INGREDIENTS. Its no surprise given the marketing of popular brands like Drunk Elephants C-Firma Day Serum and Perricone MDs Vitamin C Ester Brightening Serum. Benefits: Targets concerns of dullness and aging | Dosage: 2 pumps in AM | Active Ingredients: Ferulic acid, vitamin C, phloretin, microalgae | Skin Type: All, especially great for aging skin | Size: 1 oz | Byrdie Clean: Yes | Cruelty-Free: Yes, We like this pick for sensitive skin for several reasons. Vitamin C is inherently unstable and quickly broken down when exposed to light and/or oxygen. Benefits: Defends against free radicals to prevent visible signs of aging and dullness and refines tone and texture | Dosage: 5 drops in AM and PM | Active Ingredients: Ferulic acid, lactic acid, squalane | Skin Type: All, except sensitive | Size: 6.8 oz | Byrdie Clean: Yes | Cruelty-Free: No, Anti-aging botanicals repair and replenish. 1 star. This cream contains retinol and vitamin c. @Dermadoctor_skincare #kakadu c is my go to every night before I go to bed. The LOral Paris Revitalift Derm Intensives Vitamin C Serum is our top pick due to its accessibility, functional packaging, and effectiveness at improving skin tone and texture. Lin F-H, Lin J-Y, Gupta RD, et al. While this might not sound super appealing, it spreads easily and sinks into the skin quickly. Pullar, Juliet M et al. 3 star. Benefits: Radiance-boosting, improves appearance of dark spots and fine lines | Skin Type: All | Dosage: A few drops daily day or night | Size: 1 ounce | Cruelty-Free: Yes | Byrdie Clean: Yes, Helps improve radiance and the appearance of fine lines. "I saw almost immediate improvement with my dark spots and skin texture," said a Sephora reviewer. For example, if you use a benzoyl peroxide product at night, its best to apply your vitamin C serum in the morning. We independently research, test, review, and recommend the best Absolutely do not use if it has turned brown., Finally, take note of the type of Vitamin C in the formula. A few . Paula's Choice Boost C15 Super Booster 15% Vitamins C & E and Ferulic . She covers all things skincare for Byrdie, from ingredients to acne advice. Based on a 4 week sponsored period of use by 32 female volunteers ages 21-65:93.75% agreed complexion looked brighter93.75% agreed skin felt softer96.88% agreed skin felt smoother90.63% agreed skin felt tighter84.38% agreed skin felt more elastic84.38% reported skin felt firmer84.38% said complexion looked more radiant81.25% agreed skin felt hydrated78.13% reported skin tone looked more even75% agreed skin felt more resilient75% said complexion had more glow71.88% agreed skin appeared lifted68.75% reported skin appeared more youthful62.50% agreed serum helped improve the appearance of the visible signs of aging62.50% said they saw a visible improvement in fine lines and wrinkles59.38% reported visible improvement in under eye circles56.25% reported seeing a softening of smile lines53.13% reported seeing a visible improvement in crow's feet50% reported seeing a visible improvement in vertical lip lines.