The Rootist’s Densifying Serum has become the beauty world’s most coveted hair product, officially selling out at Sephora stores in both the U.S. and Canada. Since its launch in August, it’s skyrocketed to become the brand’s number-one best-seller, with devoted fans racing to restock their supply.
The buzz isn’t just hype—the science behind this super-concentrated formula explains its cult following for curbing thinning hair and excess hair fall. At its core is the proprietary Rootbiomic Ferment, a multivitamin superfood blend that transforms proteins, roots and mushrooms via fermentation into micronutrients your scalp can easily absorb. This innovative complex works alongside densifying peptides and exosome-rich turmeric stem cells to target every phase of the hair growth cycle.
What also sets this serum apart is what’s not in it. There’s no added water, parabens, phthalates, mineral oil, sulfates or silicones. Instead, every drop delivers concentrated active ingredients that promote stronger roots, a balanced scalp and visibly thicker hair.
The Real Results
Users are seeing dramatic improvements, particularly those dealing with hair loss and thinning. “I’ve actually tried this for a few months now and it’s so amazing,” shares one Sephora reviewer who experienced postpartum shedding. “My hair is thicker and longer and [has] much more volume.”
Another user noted immediate benefits: “First impression, this product was very lightweight and didn’t make my hair oily. Smells very good. My hair was falling out very badly, and I saw the results after the first use.”
The long-term results are equally impressive. “I’ve been using this serum for 3 months, and wow does it work!” reports another reviewer who noticed sparseness at the top of their head. “I’ve been using this serum in my hairline roots for 3 months and have noticed considerable thickness and an increase in volume.”
Clinical studies back up these real-world results, showing notable improvements in hair shedding and thinning, with users seeing fuller hair in about 90 days and reduced hair fall out and shedding by up to 85 percent.
Even Whitney Port has jumped on the bandwagon. The Hills alum says The Rootist’s Densify Collection “saved her scalp” and gave her back the volume and thickness she’d been missing.
How to Use It
Ready to join the craze? The application is straightforward: Apply two full droppers to your dry or towel-dried scalp once a day. Focus on any problem areas around your crown, part line or hairline, give it a good massage, and you’re done—no rinsing needed.
While it’s currently sold out at Sephora stores, you can still snag a bottle on Sephora.com, The Rootist’s website and Amazon—but we’d recommend hurrying, as this viral sensation shows no signs of slowing down.
