Beauty Jennifer Garner Says This Serum Has Changed Her Hair "More Than Anything Else, Ever" The damage-reversing formula is so smoothing, shoppers say it brings hair back to life By Chloe Irving Chloe Irving Instagram Website Chloe Irving is a New York-based commerce writer at InStyle and Shape, with two years of experience covering fitness, wellness, and beauty. InStyle's editorial guidelines Published on December 9, 2021 @ 07:00PM Pin Share Tweet Email We independently research, test, review, and recommend the best products—learn more about our process. If you buy something through our links, we may earn a commission. Photo: Getty Images Jennifer Garner posted a video on Instagram that (if you can get past a rather cringey song and dance number) reveals a possibly transformative hair care ingredient: Alpha Keratin 60ku. Admittedly, Jen could shout out a paper bag and we'd all rush to buy it, but when it comes to The Perfect Ending Split End Serum, she — a celebrity partner for the brand — makes a good case. Courtesy Buy on Amazon Buy on Sephora Buy on Ulta Available at Amazon, Sephora, Ulta "In case you're asking — Alpha Keratin 60ku is the patented ingredient found in Virtue's next-level hair line. Yes, it has changed my hair more than anything else, ever," she captioned beside birthday wishes for Virtue founder and bestie, Adir Abergel. For those of us who aren't award-winning actresses or celebrity stylists, the hardworking proteins found in this serum repair breakage by weaving strands of the hair's natural keratin back together, according to Virtue. "Alpha Keratin 60ku is like a GPS system where it goes directly where the damage is and gives you the best hair you could possibly have," explains Abergel. Better still, a study conducted by the brand shows a 67 percent reduction is frizz, 138 percent increase in color vibrancy, and 95 percent reparation of split ends after just five uses. This Is the Hair Oil Jennifer Garner Swears by for Repairing Thinning Hair What's more, a smoothing combination of nutrient-rich pea protein and baobab leave a sleek, silky texture…and even customers with damaged hair say this formula completely restores their hair. "Restored my quarantine hair," one shopper began. "I have long hair with very damaged ends from multiple coloring attempts. I needed a cut but then we went into stay-at-home orders and [I] couldn't. My hair was great, but the last 2 to 4 inches were super ragged and just gross. I used this for several days and it is SO much better! [It's] soft and smooth. Not 100 percent perfect, of course, but it looks so much better and feels smoother. Very happy with the product. "My hair dresser recommended this product to me. My long hair was dry and breaking a ton. She told me this product has real human keratin and helps repair the hair. And it did repair it! My hair no longer feels dry and the frizzy-ness is going away. It looks so much healthier and doesn't get tangled nearly as much," added another happy customer. Need another reason to add this split end repair serum to your cart? It's currently on sale at Amazon with a coupon at checkout, though there is a shipping delay. Need it earlier? Head to sephora.com...just don't blame us if you end up buying multiple. Shop More InStyle-Approved Picks I Test New Products Weekly, and I’ve Never Been So Impressed by a Body Oil Amazon Shoppers Say This $5 Multi-Stick Replaces Blush, Eyeshadow, and Lip Tint I Found a $25 Amazon Alternative for the Wildly Trendy Sneakers Supermodels Wear All the Time