The 17 Best Clarifying Shampoos to Beat Product Buildup

Your itchy scalp will thank you.

women who used a clarifying shampoo
(Image credit: Launchmetrics)

Anyone who has ever shared a bathroom with me can attest: despite being relatively low-maintenance with my locks, I collect hair products—from leave-in conditioners to hair oils and heat protectants—like it's a sport.

But when you're caught up in all of these luxurious offerings, it's easy to forget about the bread and butter of haircare: a simple wash. Though certainly not as sexy as, say, a new hair shampoo, sometimes we need something a little stronger to wash away the buildup from those other products. That's where the best clarifying shampoos come into play.

"Clarifying shampoo is formulated to cleanse the hair and scalp of buildup and impurities," explains Gretchen Friese, a certified BosleyMD trichologist. The expert notes that clarifying shampoos are "often used by people who are infrequent washers, swimmers, have problems with oily hair, or simply want to refresh their scalp."

Celebrity hairstylist Cynthia Alvarez agrees, noting that clarifying shampoo is especially helpful for those who use many styling products. "Clarifying shampoos use a unique formula that works like a magnet to attract dirt, dissolve it, and flush it away with water," she says. "They're specifically formulated to clear buildup and remove any residue from styling products. It prevents bacterial buildup on the scalp, creates volume, thoroughly removes buildup, restores your hair’s pH, and prepares hair for coloring services."

Ahead, our expert picks for the best clarifying shampoos on the market—plus how to take proper care of your hair while using them.

The Best Clarifying Shampoos

What to Look For in Clarifying Shampoo

  • Ingredients

Friese breaks down three common ingredients in clarifying shampoos and what makes them advantageous. The first compound she names is ammonium-sodium lauryl sulfate, which provides the deepest cleanse. "This may be best for extreme hair care product buildup or very oily hair," she notes. However, if you have any kind of keratin treatment in your hair—including at-home keratin treatments—"you should stay away from this ingredient as it will strip the treatment from the hair."

For those in need of milder ingredients, she recommends looking for cetyl-fatty alcohols as well as chlorides and bromides. The latter "can help make your hair soft," but isn't great for fine hair.

"You should look for moisturizing ingredients like aloe, seaweed and wheat proteins," Alvarez also adds.

  • Labels

While labels like "color safe" and "sulfate free" float around on clarifying shampoo bottles, master stylist Yvey Valcin notes that you still need to be wary of how your hair will be influenced.

"There’s still often sodium and alcohol in the product, which will look for any moisture in the hair and drain it off," he says.

How Often to Use a Clarifying Shampoo

For swimmers, people with oily scalps, and those who don't wash their hair often, Alzarez recommends using a clarifying shampoo regularly. Friese agrees, advising people who merely have oily hair to use it about every third wash. If you have naturally dry hair, use it only as needed.

Clarifying Shampoo Aftercare

A good clarifying shampoo treatment should be followed up with a good conditioner. Think of it this way: Your hair has been weakened and it needs some sustenance.

"Imagine you're thirsty and someone makes you run," Valcin explains. "You need to drink water and then take a little time before you start moving again. Let the hair soak in that moisture for a good five minutes and then rinse it out like 90 percent of the way—especially for high-density hair. The best thing to do is a deep conditioning treatment. Soak the hair in some deep conditioner and let the hair drink it up."

Is Clarifying Shampoo Bad For Hair?

While clarifying shampoo isn't necessarily bad for your hair, it's important to use it only when a deep clean is necessary—and to make sure you rehydrate your locks afterward.

“You have to have a reason to use clarifying shampoo," explains Valcin. "Let’s say you’re doing a keratin treatment. It’s important to [preemptively] remove dirt and product buildup, so that would be a good reason to use clarifying shampoo. But let’s say you have virgin hair, you don't use a lot of product, you've never done anything to it. It might strip out the moisture and the nutrients that your scalp produces."

How We Tested

Contributing Beauty Writer Sophia Vilensky found the best clarifying shampoos on the market based on customer reviews, Marie Claire editor recommendations, expert recommendations, and her own testing. After receiving samples of numerous clarifying shampoos and returning to some old favorites, she took about a million showers, evaluating each product based on texture, price, smell, and most importantly how clean it made her hair. Oil who?

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Meet the Experts

Yvey Valcin headshot
Yvey Valcin

Yvey Valcin is a celebrated Master Stylist and Founder of Yvey Salon. Known for his superior cutting technique and unique gift for uncovering the individual beauty within his clients, Yvey has styled top editorial and fashion events such as New York and Paris Fashion Week and was one the highest rated stylist at the flagship Gene Juarez salon in SeattleHis passion for hair extended his training to the most respected names in the beauty industry including: Jacques Dessange Paris, Raffel Pages Barcelona, La Biosthetique Canada, and Bumble and Bumble New York. The combination of his passion and technical skills enables him to bring out the best version of each individual sitting in his chair.

Gretchen Friese
Gretchen Friese

Bosley MD’s Certified Trichologist and go-to education authority on all things hair loss and hair thinning, Gretchen always had a genuine passion for hair care and developed her expertise specifically in hair loss and hair thinning, making it her continued mission to help women and men find solutions to their hair loss concerns.

Gretchen has over 20 years of experience in the beauty industry, from being hands-on behind the chair in salons, to educating consumers on hair loss solutions and stylists about haircutting techniques. In 2016 she received a certification in Trichology/Hair Loss through the United States Trichology Institute.

Cynthia Alvarez, hairstylist
Cynthia Alvarez

Born and raised in the Bronx, New York, Cynthia Alvarez is a celebrity hairstylist who has worked with clients of all hair types, including Shakira, Alicia Keys, Dascha Polanco, and more.

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Sophia Vilensky
Freelance Writer

Sophia Vilensky is a Freelance Beauty Writer at Marie Claire with a beauty, wellness, and entertainment journalism portfolio that includes contributions to Byrdie, Bravo, Teen Vogue, and Us Weekly. Growing up in a family of beauticians—and through her own personal studies—she developed an in-depth understanding of aesthetics, cosmetic product formulation, and beauty treatment development and has also held roles as a senior copywriter, content strategist, and proofreader for top beauty and wellness brands. Even so, you'd be hard pressed to find her with her hair and makeup actually done. Sophia is based in Minneapolis and is a 2019 graduate of the University of Minnesota, where she majored in English and minored in cinema studies. During her time at the university, she was the Arts & Entertainment Editor for the Minnesota Daily, earning the 2019 Editor of the Year award for her work. She connected deeply with the Twin Cities arts scene, collaborating with leading beauty professionals, designers, and artists. Graduating Summa Cum Laude, her thesis—a close-reading of Vanderpump Rules—was featured on NPR. When not immersed in writing or testing new products, Sophia enjoys watching reality TV, reading, and exploring the newest woo-woo wellness trends. Keep up with her on Instagram @sophiavilensky.