This $10 TikTok-Loved Shampoo Makes Hair Grow 'So Fast' Thanks to a Surprising Ingredient

Shoppers noticed longer hair “within weeks” of using the nourishing formula.

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Woman running hands through hair
Photo: ohlamour studio / Stocksy

By now, you've probably tried every fruity-scented shampoo imaginable (everyone had at least one Herbal Essences phase in the 2010s, right?) However, in recent months, TikTokers have discovered one ingredient from Mother Nature that promotes hair growth: rosemary.

"Rosemary oil can help promote hair growth in some individuals with age-related hair loss, such as androgenetic alopecia," dermatologist James Y. Wang of Metropolis Dermatology previously told Shape, adding that when applied topically, the ingredient may block DHT, a hormone that can weaken and stop hair follicles from growing. From rosemary serums to homemade rosemary infused concoctions, TikTokers have found dozens of ways to get the herb into their curls, but one product hundreds agree is worth it is this rosemary shampoo from Mielle. (Pssst: These are the best growth serums to stop hair from shedding.)

Mielle Rosemary Mint Strengthening Shampoo

Buy It: Mielle Rosemary Mint Strengthening Shampoo, $10, and

"As you guys know, about a month and a half ago I started to shave my head because of heat damage… as you can see, it's growing so fast," TikToker @maryjay_o told followers, crediting this rosemary shampoo for her strands' speedy recovery. Formulated with a cleansing blend of rosemary leaf oil and peppermint extract, the Mielle Rosemary Mint Strengthening Shampoo gently removes dirt, oil, and buildup from the hair and scalp, creating the ideal environment for new hair growth. Plus, extra hair-strengthening nourishment comes from an infusion of biotin, a B-complex vitamin, integral to the structure of hair, and castor oil, which has been shown to prevent breakage.

With all these hair-saving ingredients in the mix, it's easy to see why this shampoo has become so buzzworthy. "It has left my hair super moisturized every time I wash this out. My hair feels soft and I absolutely love it," said creator @curlsxcourtney, adding that it's also helped their "hair grow tremendously." An Amazon shopper who struggled to grow hair past their chin noted that it's now "almost shoulder-length" and "shiny as heck!" Another Amazon reviewer added that they started noticing a difference in the length of their locks "within weeks."

If stronger, longer, and thicker hair is what you're after, this Internet-famous rosemary shampoo is worth checking out. Shop it on Amazon and Target for $10

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