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Because a happy scalp is the *root* of happy hair.

I am a BuzzFeed Shopping contributor with previous bylines in ELLE, Cosmopolitan, and Glamour and love volunteering at the local animal shelter or making impromptu wildlife rescues.

Promising reviews: “Other people noticed how much nicer my hair looked when I started using this shampoo!” —Tammy Ebanks

"This is the best clarifying shampoo I have ever used. It leaves my scalp squeaky clean and removes product buildup. I only use it every other week because otherwise it would be too much. But every other week has been the way to go." —Linzo19

Promising Review: “This is a great product for dry scalp! I can literally feel the product soak into my scalp, and it doesn't make it feel greasy at all! It's like a little water bottle for my scalp. I don't use it every day, but for sure once a week, and I have used it on damp hair and dirty hair, and it works great!” —Andrea

Get it from Amazon for $14.70+ (available in packs of one or two).

Promising review: “I’ve repurchased this a few times now. If you’ve got curly hair and you’re prone to scalp buildup because you go days without washing your hair, this is for you. It’s water-based and feels so good on my scalp!” —Gina Merritt

Promising review: "A game changer for scalp care! I'm obsessed!! This oil is like a spa day for your scalp, cleansing away buildup and giving it the TLC it deserves... It's a lifesaver for dry, itchy, flaky scalps. What I love most are the plant-based ingredients." —Victoria Engasser

Promising Review: “My favorite shampoo, favorite Briogeo product. It smells so nice. A little goes a long way, you can make a pot of it last! The lather is nice and rich. It leaves my hair and scalp feeling clean and fresh but not totally stripped. I highly recommend it!!”

Get it from Amazon for $15+ (available in 5 sizes).

Promising review: “This works SO WELL!!! I have oily hair and a dry scalp (terrible combo, I know), but this has helped so much! I can go a few days between washes, and it leaves my hair feeling so clean. There is a cooling feeling to it, which some may not enjoy, but I do." —Madeleine

Get it from Amazon for $12.99+ (also available in a pack of two).

Promising review: “This scalp massager is comfortable to hold, and the soft silicone bristles feel great while shampooing. It helps work the shampoo through my hair and leaves my scalp feeling clean and refreshed without being too harsh. It's simple, well-made, and a surprisingly nice addition to my shower routine.” —Dennis P.

Get it from Amazon for $6.99+ (available in 32 colors). 

Promising review: “This compares to no other product on the market. Wet or dry hair, hair up or down, this does not limit your use and truly heals the scalp flakiness. It is super gentle and lightweight, and worth the money. I promise!!!!" —Lily

Promising review: "I have thick, coarse, wavy hair and I've struggled with buildup for years. No matter what clarifying shampoo I tried, my scalp would still feel oily, itchy, or weighed down after a day or two. The difference was almost immediate with this. My scalp feels so much cleaner, lighter, and less itchy, and my hair doesn't get greasy nearly as fast. It's honestly been a game changer for my haircare routine, especially for the price!!" —Aery

Get it from Amazon for $12+ (available in three sizes and multi-packs).

Read more about how rosemary oil could be as helpful at encouraging hair growth as Rogaine at Cleveland Clinic. 

Promising reviews: “I had some balding around my temples. Been using this for three months and I’ve noticed improved growth around my hairline!” —KLee

"The woman who does my braids asked if I had been using something on my hair because it had become much thicker than before. That was a huge compliment and made me feel like the product was actually helping. The oil is easy to apply, smells strong but nice, and has become a staple in my routine." —Anne

Promising review: “I live in an area with very hard water, and my hair was starting to look dull... My hair felt soft and looked shiny after just one wash. It doesn't smell like vinegar at all — it smells like a high-end spa. Highly recommend if your hair feels weighed down or gunked up from your water or products. The best clarifying shampoo I’ve ever tried. It lathers really well, and also leaves my scalp feeling cleaner than it ever has. I love that it’s sulfate-free but still powerful enough to remove heavy buildup...my hair feels reborn!” —Mic B

Get it from Amazon for $16+ (available in six sizes and multi-packs).

Promising review: "Wow! Just wow! I have been using the product for a week and cannot believe the difference in the softness, shine, texture, and overall look of my hair...I have been applying FutureIQ for a week, every night, and I am so impressed with how my scalp and hair have changed in that amount of time. I admit I was hesitant due to price, but if my hair feels this healthy after a week, I am in!" —Amazon Customer

Promising review: “Lightweight, it doesn't weigh down my fine hair. My hair is very soft after using this; there's no strong smell, and this is definitely helping in my hair health journey! Great, high-quality shampoo.” —Kaya

Get it from Amazon for $39 (available in two sizes).

Promising Review: “LOVE THIS FOR OILY HAIR! This shampoo is in a great price range, and it keeps your hair very clean and less oily in between washing. I usually go about 8–10 days before I wash again, and this shampoo does a great job keeping my hair looking great! The bottle doesn’t leak, and it makes your hair smell nice.” —Tracy Jurowicz

Get it from Amazon for $11.97 (available in two sizes).

And yes, this includes everything you need to install it yourself!

Promising review: "I have been showering in the tap water for the past 13 years. Sometimes, I can literally smell the chlorine in it. I have fine and curly hair that is constantly dry, frizzy, and breaking. I’ve tried everything else I could think of: hair masks, scalp treatments, hair oils, leave-in conditioners, hair vitamins, silk pillow covers/silk hair ties, etc., etc. I avoid brushing it, and I don’t use shampoo, dyes/lighteners, or heat on my hair. I didn’t want to believe that a fancy expensive shower filter would save my hair…but now I'm convinced. After the FIRST USE, my hair looks smoother and shinier than it has in a long time. My curls are also softer and bouncier. I can’t wait to see how my skin and hair improve over time!!" —Jessica

Get it from Amazon for $169 (available in six colors).

Promising review: “Wow, this really works! I have never used a scalp exfoliator and didn't know what to expect. My scalp felt clean, moisturized, and less tight... I'm impressed.” —Lynn T.

Promising review: "I cannot recommend this product enough!! It really has made a huge difference with my scalp. It is pricey, but if you can afford to add this, I 100% would. My hair was so flaky, but it has helped with my flakiness and helped my confidence because the flakiness has almost become nonexistent." —Jasmine

Promising review: “Best shampoo I've tried in recent years. I have an oily scalp, but usually my hair feels dry after a shower because of my hard water. All the other oily scalp shampoos I've tried left my hair unmanageable and tangled. [With] this shampoo, my hair is slick and smooth after a shower but not dry. My scalp feels better than usual, too.” —Mishka Haznor

Promising review: “I use this to mix jojoba, olive, almond, neem, castor, and rosemary oil. I heat it up in the bottle and apply it to my scalp and hair. Makes hair oiling very easy and mess-free!” —Amanda

Get it from Amazon for $4.99+ (available in four colors and packs of two).

Promising review: “Welp, I've been on a six-week silver growout detour straight from hell, and Malibu C Un-Do-Goo absolutely saved my life. This product is worth its weight in gold. I can't say enough good things. And my hair looks shiny and feels soft.” —Michelle Miller Phelps

Get it from Amazon for $2.20+ (available in four sizes).

This is meant to be applied to the scalp after shampooing but before conditioning. Gently massage, wait about 30 seconds for the warming sensation to set in, then rinse out and follow up with conditioner.

Promising review: “Makes my hair feel soft and moisturized but not greasy! My scalp feels clean, my hair feels great. I am also using the matching shampoo and conditioner, but I feel like when I use this product along with them, I notice an improvement in my hair appearance and feel.” —Morgan

Get it from Amazon for $33 (also available as part of a kit).

Promising review: “If you like to wear your hair down in a part, if you have a middle part when you wear your hair up, if you have thinner hair...this is the right product for you. No more sunburn scalp nightmares... It doesn’t make your hair greasy and is perfect for spraying your hairline, scalp, part, etc. I do this with my child’s hair a lot because the sun just seems to stream right through her hair." —Kaylee E Agin

Promising review: “I love this shampoo. I started having dry, flaky scalp postpartum, and I tried a lot of different things that did not help, but this did! It lathers well and smells nice. It helps me be able to go longer in between washes and decreases greasiness. I lather it on my scalp and let it sit for a little bit, then rinse it out. The flakes on the front of my scalp have completely gone away, and my hair is nice and clean.” —Kelsey

Get it from Amazon for $28.03+ (also available in a pack of 12).

Promising review: “I really love this serum! It makes my hair feel stronger, softer, and healthier. It is lightweight, smells amazing, and doesn’t leave my hair greasy. I’m very happy with the results and would definitely recommend it.” —Maybel

Get it from Amazon for $36+ (available in two sizes).

Promising review: “I never write super lengthy reviews, because I like to keep them short and concise for people to quickly read and get the point, but this is absolutely one of my best purchases. The comb is in perfect shape, and it really feels like a head massage. It’s super easy to just brush and click the button to release the gunk. I took a picture of all it got out with me just mindlessly combing and scrolling my phone for 30 minutes. My scalp feels so nice, and I imagine it’ll feel even better after I wash my hair. I think this is an amazing product, definitely worth the price. No notes!!" —Kay

Get it from Amazon for $5.29+ (available in five colors).

Promising review: “I have been using this product for more than 10 years and I love it. It was getting difficult to find in southern salons, so I lucked out and found it on Amazon. It tames my hair without weighing it down, and the smell is just wonderful.” —Jane McDaniel

Get it from Amazon for $34+ (also available in a pack of two).

Promising review: “Love this! It leaves my hair feeling super clean, fresh, and soft without drying it out. It removes buildup really well and makes my hair look healthier and shinier. Definitely worth it!” —Mesly Lagos

Get it from Amazon for $31+ (available in two sizes).

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BuzzFeed Shopping is service journalism first: our writers and editors spend all day shopping so you don’t have to, vetting products, fact-checking brand claims, and surfacing what actually helps in real life. We center readers over revenue, recommend products with authenticity (using real experiences, not ad-speak), and reflect our diverse audience, inclusive of a variety of price points, people, and needs. We cut through fake deals, favor useful info over glossy fluff, and recommend both budget and splurge options with context so you can decide what’s right for you — and still have a little fun along the way.

Reviews have been edited for length and/or clarity.