I’ve Tried Hundreds of Face Serums—But These Are the Best I’ve Used for Anti-Aging

ProsLightweight enough for daily useReviewers say it feels really hydrating on skinCosmo Holy Grail Beauty Award winnerConsVery expensive for only an ounce of productWhy we love it: Experts, and the whole Cosmo team, are obsessed with growth factors. How do they work? Well, they stimulate fibroblasts, which are the cells responsible for producing more collagen. We naturally start losing collagen at about 25, and it’s the key to skin that’s plump and firm. BioEffect has been at the forefront of the growth factor conversation for years, and this day serum makes implementing this powerful ingredient into your routine so easy. Just once a day, massage this lightweight serum into your skin, and over time, it’ll help fight wrinkles, speed up wound healing, and even improve the skin barrier.One Cosmo editor’s review: “I can't even express how much I love this serum. I’m 26, so i want to get on my preventative serum game, but retinol and heavy formulas simply irritate my skin. however, this is hydrating and formulated with high-tech growth factors to promote collagen production, so i really get the best of both worlds here.”—JASMINE HYMAN, ASSISTANT BEAUTY EDITORKey ingredientsGrowth factors, barley seed extract, hyaluronic acidBest forAll skin typesUsage instructionsDaily in the morning, before sunscreenFragrance free?YesProsReally thin consistency layers well with other productsSoothing formula is suitable for virtually every skin typeConsI go through the bottle somewhat quickly, which is a bit annoying considering how expensive it is (but I've gone through many bottles, and I'd say it's worth it)Why we love it: Dr. Diamond is one of the most well-known plastic surgeons in Beverly Hills who has touched the faces of many of your favorite celebs. But if you can’t get into an office visit with him, his Metacine line is the next best thing. The serum—filled with growth factors, peptides, and hyaluronic acid—helps support collagen and elastin, and over time, can improve skin’s firmness and smoothness.One Cosmo editor’s review: “I’m no stranger to growth factor serums, having tested a handful over the years since I first discovered the magical ingredient for soothing and anti-aging. But Dr. Diamond’s Metacine has been a shelf mainstay for me for over a year now, and it shows in my skin. This lightweight serum is part of a trio of Dr. Diamond’s products meant to mimic his in-office celebrity-loved facial. It quickly sinks in, doesn’t break me out, and immediately soothes and hydrates. But over time, I’ve absolutely noticed that my skin is tighter and clearer. I’m convinced it’s helped stave off some stress lines in my forehead that definitely should be there at 29.”—BETH GILLETTE, BEAUTY EDITORKey ingredientsGrowth factors, peptides, hyaluronic acidBest forAll skin typesUsage instructionsDaily, morning or nightAdvertisement - Continue Reading BelowProsCompletely customized formula based on your skin's needsConsHave to get a prescription (but it's very easy to do online)Why we love it: Most dermatologists will tell you the best anti-aging product is prescription retinol, also known as tretinoin. And if you want to get it without heading to the doctor’s, try Agency’s Night Renew. You’ll take a quiz on your skin type, what you’re looking for, sensitivity levels, and more, and the brand creates a compounded formula with just the right dose of tretinoin for you. But you might also see other actives in your custom treatment: tranexamic acid, azelaic acid, niacinamide, and more.Key ingredientsTretinoinBest forAll skin types, since you can adjust the formula based on your needsUsage instructionsCheck the brand's suggestions, as these will vary depending on your prescriptionFragrance free?YesProsUses peptides that can help temporarily reduce muscle movements to help get rid of and prevent wrinklesCosmo Holy Grail Beauty Award winnerConsWill require consistent, daily use to see results, which can still take up to three monthsWhy we love it: Peptides are one of the trendiest skincare ingredients of 2026, and this anti-aging serum is loaded with them. There are various types of peptides on the market, but the ones used in this serum help smooth fine lines and wrinkles (including forehead wrinkles, smile lines, and crow's feet) and prevent new lines from forming too. It's a great option for anyone who wants to minimize lines on their face and isn't quite ready to try a neurotoxin like Botox, Xeomin, or Daxxify.One Cosmo editor’s review: "A lot of anti-aging serums can feel heavy on my oily, acne-prone skin. But juuuust because I'm not dry doesn't mean I don't wanna prevent wrinkles, dammit. My face immediately drinks up P-Tiox's lightweight, watery consistency—no sticky residue left behind. But I also notice it definitely helps smooth out my skin. I've been using this serum on and off for a year, and my forehead is so smooth—and I haven't topped up my Botox in nearly a year." —BGKey ingredientsPeptides, niacinamide, salicylic acidBest forAll skin typesUsage instructionsDaily, morning and/or nightFragrance free?YesAdvertisement - Continue Reading BelowProsCosmo Holy Grail Beauty Award winnerCombines alpha-arbutin and vitamin C to brighten dark spotsNot irritating, according to our testingConsCan take a while to see resultsWhy we love it: All that time you spent in the sun sans SPF has potentially led to a plethora of dark spots. It’s a sign of a life well-lived, but if you want to fade them, this serum is packed with brightening alpha-arbutin, vitamin C, and malic acid. But it’s not too harsh on sensitive skin, either. There’s a mix of soothing rosemary extract and hydrating squalane and hyaluronic acid to offset any irritation.One Cosmo editor’s review: “Post-inflammatory hyperpigmentation from old breakouts is such a pain to treat, but this serum has been excellent at fading it. The creamy formula brightens and evens out my skin tone without being the slightest bit irritating.” —LAUREN BALSAMO, BEAUTY DIRECTORKey ingredientsAlpha-arbutin, squalane, vitamin CBest forOily, combo, dry, acne-proneUsage instructionsDaily, morning and/or nightFragrance free?Yes, but contains botanical extracts that can be sensitizingProsSeriously smoothes texture, fine lines, and moreOnly need a pea-sized dot for your whole face, so a bottle lasts a whileConsLikely too harsh for sensitive skinWhy we love it: Yes, Differin is billed as an acne product. But it’s actually one of the best over-the-counter retinoids we have. Its main ingredient, Adapalene, is the closest to tretinoin, the gold-star anti-aging ingredient prescribed in-office by dermatoloigsts. So while Differin can help reduce breakouts, it can also help increase cell turnover that churns out brighter, smoother skin over time—a must if you want to get rid of and prevent dark spots and fine lines.One Cosmo editor says: “I’ve used adapalene off and on all of my 20s, and it really is fantastic for smoothing skin. I’ve even used it to help reduce stretch marks. It’s fantastic and the closest to a miracle-worker I’ve found without needing to go to a derm’s office.”—BGKey ingredientsAdapaleneBest forOily, acne-prone skin (might be a bit too harsh for dry or sensitive skin)Usage instructionsStart with once a week for a week, then build up to twice a week for two weeks, and finally three nights per week indefinitelyFragrance free?YesAdvertisement - Continue Reading BelowProsContains retinol and AHA to smooth and resurface skinGreat for minimize the look of large poresConsSome reviewers say the scent can be off-puttingBottle is prone to clogging, according to some reviewersWhy we love it: The beauty brainchild of celebrity esthetician Shani Darden, this anti-aging serum is a favorite among her A-list clients (including Shay Mitchell and Jessica Alba) for its ability to smooth fine lines and wrinkles, improve the appearance of large pores and uneven texture, and give skin a bright, even-toned glow. The magic? A blend of encapsulated retinol, lactic acid, and antioxidant-rich apple fruit extract.One Cosmo editor’s review: “I’ve used and loved this retinol serum for years. The lightweight formula is extremely effective but doesn’t irritate my skin at all, even though it contains both retinol and a little bit of lactic acid to seriously smooth skin. It’s my go-to rec for anyone with bumpy skin.”—BGKey ingredientsRetinol, AHAs, apple fruit extractBest forDry, combo, oily, acne-proneUsage instructionsStart with once a week for a week, then build up to twice a week for two weeks, and finally three nights per week indefinitelyFragrance free?YesProsPacked with antioxidants *and* hydrators for an all-in-one daily serumConsMight be a bit heavy for very oily skin typesWhy we love it: Vitamin C is a powerhouse antioxidant that many experts say is a must in an anti-aging skincare routine. It can help brighten dull skin, fade dark spots, and even soften fine lines and wrinkles by promoting collagen production. This formula from Lenox and Sixteenth feels especially modern, thanks to its creamy consistency and dual forms of vitamin C. There’s also niacinamide to even skin tone, plus hydrators (ceramides, squalane, and hyaluronic acid).One Cosmo editor’s review: “Okay, there are many reasons I think this vitamin C is elite. I’ve been using it for the past three months, and I’ve seen a huge improvement in my post-inflammatory hyperpigmentation. I also love that instead of leaving a dull cast on face (a lot of high-performing vitamin Cs do that), it gives my complexion a beautiful glow. Most of the time I don’t even need to put on foundation or skin tint. The squalane, peptides, and ceramides also help to make this a great option for sensitive skin.” —JULEE WILSON, BEAUTY EDITOR-AT-LARGEKey ingredientsVitamin C, niacinamide, ceramides, sodium PCA, squalane, hyaluronic acid, exosomesBest forAll, but vitamin C can be a bit strong for very sensitive skin, so consider starting slow (two to three days a week at first)Usage instructionsEvery morning (and follow with SPF)Fragrance free?YesBeth Gillette is the beauty editor at Cosmopolitan, where she covers skincare, makeup, hair, nails, and more across digital and print. She can generally be found in bright eyeshadow furiously typing her latest feature or hemming and hawing about a new product you "have to try." Prior to Cosmopolitan, she wrote and edited beauty content as an Editor at The Everygirl for four years. Follow her on Instagram for makeup selfies and a new hair 'do every few months. Lauren Balsamo is the beauty director at Cosmopolitan where she writes, edits, and produces all types of beauty content—from product reviews to personal essays and trend reports. She has covered beauty for more than a decade at Cosmopolitan. Follow her on Instagram.