If you click on links we provide, we may receive compensation. Beauty Hair Haircare Shoppers Say This Hair-Smoothing Treatment Turns “Lifeless” Strands “Lustrous" It has 20,000-plus five-star ratings. By Tamim Alnuweiri Tamim Alnuweiri Tamim is beauty commerce writer at InStyle, with nearly a decade of experience writing about beauty, fashion, wellness, and music. InStyle's editorial guidelines Published on July 4, 2024 @ 07:00AM Photo: Getty Images The quest for silky, lustrous hair knows no bounds. (I myself have done things that border on… unhinged.) Thankfully there are easy to use, affordable, and top-rated solutions available at your fingertips. Take BioSilk’s Silk Therapy Original Cure Treatment—it’s now $24, will (potentially) be delivered within 48 hours if you have a Prime membership, has sold more than 7,000 bottles in the last month, and has a staggering 20,000-plus five-star ratings. BioSilk has a slew of products that have thousands of five-star ratings, but its Original Cure Treatment will always remain its crown jewel by a wide margin. It’s a leave-in treatment that heals various types of hair damage while imparting “unbelievable” luster. BioSilk Silk Therapy Original Cure Treatment Amazon $43 $24 at Amazon The BioSilk Silk Therapy Original Cure Treatment formula was created in 1986, nearly four decades ago and it’s stood the test of time. Its formula includes a lot of complicated science, but two easy-to-understand ingredients are panthenol and eugenol. The former is a doubly moisturizing ingredient—it hydrates hair but it also continually pulls in hydration throughout the day. It also repairs damaged strands and thickens hair. Eugenol is an antioxidant that improves scalp circulation, which also possibly leads to hair growth. The result, according to one of the thousands of five-star reviews, is a “miracle worker” that “transforms dull, lifeless hair into lustrous locks.” Several shoppers say that it only takes a “very small amount” to make hair “silky and shiny.” Its reparative properties are noteworthy, too. One reviewer said their hair wasn’t growing due to extreme breakage; After using BioSilk Silk Therapy Original Cure Treatment their hair finally “started growing again.” BioSilk Silk Therapy Original Cure Treatment is a product with a decades-long legacy, a fanbase to match, and unbelievably high ratings (89 percent are five-star). Dozens of shoppers emphasize that you only need a few drops, that the bottle lasts a long time, and that it’s well worth the price, especially now that it’s 44 percent off. Biosilk Volumizing Therapy Root Lifter Amazon $14 at Amazon Biosilk Silk Therapy with Coconut Oil Moisturizing Conditioner Amazon $14 $13 at Amazon Shop More InStyle-Approved Picks Oprah’s Favorite Flattering Jeans and Fall Boots Are Already Up to 58% Off at Amazon People Always Compliment My Silky, Smooth Skin, and My Go-To Products Start at $11 23 Nordstrom Weekend Deals Up to 64% Off: Calvin Klein, NuFace, and Madewell