13 Best Shampoos for Hair Growth, According to Testers and Dermatologists

What we love: Olaplex’s products are cult favorites for hair hydration, fullness, and shine. “Having No. 4 on deck has totally transformed my hair since I started using it,” says Vogue senior shopping editor Talia Abbas. “My split ends look way less split, and my hair has stopped falling out in big chunks when I shower. Everything just looks and feels healthier.” The shampoo is safe for all hair types, says celebrity hair colorist Bianca Hillier, because its formulation gently removes buildup while resisting dryness.

• One Glamour reviewer says: I’ll be honest, as a Black woman, I didn’t think Olaplex would work for my hair. But I decided to dye and bleach my hair last summer, and the Olaplex No 4 Bond Maintenance Shampoo has been my saving grace. I’ve been using it consistently for nearly a year now along with some of the brand’s other treatments and my hair isn’t only thicker and longer, it’s honestly stronger than it was precolor, which is pretty wild.—Francesca Simmons, Glamour reviewer
• Key ingredients: Coconut oil, glycerin
• Scent: Lightly floral
• Safe for color-treated hair: Yes
• Size: 8.5 oz.
• Hair type: Best for all hair types

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^{Original photo from Glamour tester Francesca Simmons}

Dandruff can actually lead to thinning hair. If this problem plagues you, turn to dandruff shampoos like this one with zinc pyrithione (ZPT) in them, which says Brooke Jeffy, MD, a board-certified dermatologist. The ingredient prevents the growth of yeast and kills bacteria that can lead to a itchy, flaky scalp. Head & Shoulders' shampoo is also free of parabens and phthalates, two preservatives known to interfere with your endocrine system, Dr. Del Campo explains. “There’s a concern [these ingredients] might do more harm than actual good,” he says, which is why he recommends shampoos made without them. Formulated with just nine ingredients and dermatologically accredited by the Skin Health Alliance (an organization that independently reviews products for safety and efficacy), this product is “meant for basic stuff that does promote some new growth,” Dr. Del Campo says.

• Expert tip: For optimal results, use at least twice a week, per the brand.
• Key ingredients: Zinc pyrithione
• Scent: Aloe, orchid
• Safe for color-treated hair: Yes
• Size: 13.5 oz.
• Hair type: Best for all hair types

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This drugstore option from L’Oréal is free of sulfates and parabens that generally strip moisture from your hair. Its rosemary extract can help block dihydrotestosterone, a hormone that can increase hair-follicle miniaturization, and increase blood flow to the scalp. It’s an ideal shampoo for oily hair, safe to use on color-treated hair, and its under-$10 price point is a boon for your budget.

• One Glamour reviewer says: I have naturally fine, oily hair, and after having my daughter, I lost so much hair. I wasn't one of those people who was blessed with growing, flowing hair throughout my pregnancy. The shedding was so overwhelming. Growing up with a mom who’s a hairstylist, she always geared me toward great drugstore options. I used the L’Oréal Ever Strong shampoo and conditioner for six months postpartum and it worked. My hair returned to its natural state within that time, and it grew a lot longer as well. —Jessica Higuera, Glamour reviewer
• Key ingredients: Rosemary
• Scent: Jasmine, bergamot
• Safe for color-treated hair: Yes
• Size: 8.5 oz.
• Hair type: Best for thin, fine hair

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^{Original photo from Glamour tester Jessica Higuera}

This shampoo is rich in hyaluronic acid, an ingredient that amps up hydration and vitamin B3, which work to rebuild your scalp's natural ecosystem, says board-certified dermatologist Melanie Palm, MD. Meanwhile, salicylic acid fights itching and flakiness.

• One Glamour reviewer says: I grew my hair out with the Kérastase Resistance shampoo, conditioner, leave-in treatment, and hair mask. Since I’m a hairstylist, I was always coloring and experimenting, but I switched over to these hair products and vowed to not do anything to my strands for a year (with the exception of frequent blowouts). I used the shampoo every four to five days and noticed true results in about three months. You have to be consistent and patient, and I also recommend switching over to a silk pillowcase and changing your showerhead filter.” —Rosio Diaz, Glamour reviewer
• Key ingredients: Hyaluronic acid, ceramides, salicylic acid, gluco-peptides
• Scent: Lightly floral
• Safe for color-treated hair: Yes
• Size: 8.5 oz.
• Hair type: Best for all hair types

Save when you shop for the best shampoos for hair growth with these Amazon promo codes.

^{Original photo from Glamour tester Rosio Diaz}

Our tester praised the way Davines’s shampoo softened her hair and left it feeling silky and clean. Its formula includes beta-carotene, which is known to boost production of progesterone, a hormone that declines with age and contributes to hair loss. This fine hair-friendly shampoo is lightweight enough even for the thinnest of strands, adding volume but not weight.

• One Glamour reviewer says: Hair-growth products are something I actively try. After I started dying my hair and using hot tools consistently, I noticed a lot of breakage with my hair. I’ve always had long, thick, mermaid hair, and now it never grows without the help of certain products. One product that I rely on is Davines’ OI Shampoo. It has a milky consistency that doesn’t dry out my hair after repeated use (the way other shampoos do), but it still leaves everything feeling really clean. I don’t need to apply a lot of conditioner after using it, either. I noticed these results in three months of using the product. I also take supplements and use styling products that are tailored to hair growth. —Loreen Hwang, Glamour reviewer
• Key ingredients: Natural oils, glycerin, beta-carotene
• Scent: Floral
• Safe for color-treated hair: Yes
• Size: 9.46 oz.
• Hair type: Best for all hair types, especially fine

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^{Original photo from Glamour tester Loreen Hwang}

This shampoo is rich in caffeine (which Mark Townsend, celebrity hairstylist, says can help block testosterone on your scalp from shrinking follicles, leading to baldness), niacin (which increases scalp circulation), and saw palmetto (a botanically based hair-booster). The formula cuts down on product buildup without leaching your natural oils. Our reviewer was especially impressed that the results of the product seemed to extend beyond when the bottle ran out.

• One Glamour reviewer says: I use Hairmax’s shampoo to target hair loss specifically in the middle of my scalp. I noticed a huge difference in about three months of using the shampoo weekly and the serum daily. I paired it with the brand’s Growth Serum, and it felt like it made things work two times faster. If I take breaks and switch to another shampoo for a few weeks, I don’t notice a difference in thinning or shedding, so I’m happy to know the results actually last. I just wish it were more affordable! —Breanna Davis, Glamour reviewer
• Key ingredients: Saw palmetto, niacinamide, zinc, caffeine
• Scent: Natural
• Safe for color-treated hair: Yes
• Size: 10 oz.
• Hair type: Best for all hair types

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^{Original photo from Glamour tester Breanna Davis}

This clarifying shampoo from Philip B features keratin amino acids, the primary protein in hair, and is packed with natural oils that seal in moisture. Its formula also includes caffeine, which improves your hair density for a thicker, fuller appearance. To use the shampoo, apply it to your oiled roots, add water, and massage it in for at least two minutes before rinsing it out.

• One Glamour reviewer says: Kicking off my hair transformation has been a wild ride, but with the help of Philip B’s Scalp Booster Shampoo in my repertoire, I’m prevailing. It’s the secret weapon that keeps my hair looking thick and my scalp healthy. Packed with redensyl, caffeine, and niacin, it’s the ultimate triple-threat formula that’s boosted my hair growth, reduced thinning for me, and given my hair a fuller appearance overall. Getting my hands on this product was a breath of fresh air; it’s like the best pregame for my upcoming hair transplant this summer! —Wally Montes de Oca, Glamour reviewer
• Key ingredients: Coconut oil, keratin, caffeine, niacin
• Scent: Floral, citrus
• Safe for color-treated hair: Yes
• Size: 6 oz.
• Hair type: Best for dry hair

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^{Original photo from Glamour tester Wally Montes de Oca}

Our reviewer highlighted how bouncy, volumized, and moisturized her hair felt after months of using this thickening shampoo from V&Co. It’s rich in peptides, which are small proteins made up of short chains of amino acids that work to cut back on scalp oil and improve overall hair density. Meanwhile, coconut oil protects your scalp from bacteria and other irritants.

• One Glamour reviewer says: I love a “smart” beauty product and nerd out about peptides and other ingredients that add thickness and volume. The V&Co. peptide-infused shampoos and conditioners are super lightweight, so they don’t weigh down my hair, and over time, I’ve noticed a ton of volume and growth. I also have to say they’re both great at keeping my hair hydrated and healthy without breaking the bank because the entire line is super affordable.” —Gianna Cesa, Glamour reviewer
• Key ingredients: Biotin, coconut oil, peptides
• Scent: Floral, tropical
• Safe for color-treated hair: Yes
• Size: 12 oz.
• Hair type: Best for thicker hair

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^{Original photo from Glamour tester Gianna Cesa}

As someone with curly hair herself (a hair type that can be dry and brittle), Jalia Pettis, a hairstylist and makeup artist based in Phoenix, appreciates how this shampoo clarifies strands, strips them of buildup, and then moisturizes with natural ingredients, like sea kelp and blue tansy flower oil. Hydrating dry, frizz-prone hair helps with hair growth by combatting the impact of a flaky scalp and fortifying brittle follicles so they’re less prone to breakage, she explains.

• Expert tip: Consider buying this hair shampoo in a set with a matching conditioner and oil. “What turned me on to [this brand] was actually the oil,” Pettis says. “I really like how it felt on the scalp without weighing it down.”
• Key ingredients: Blue tansy, jojoba oil, bamboo, sea kelp
• Scent: Floral
• Safe for color-treated hair: Yes
• Size: 14 oz.
• Hair type: Best for natural hair types (wavy, curly, kinky, coily)

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If you’re looking to double down on your hair-growth efforts, consider this shampoo-conditioner set from Pura D’or. Dr. Del Campo often recommends this brand to patients as it’s widely available and incorporates a lot of what he looks for in a hair-growth shampoo, including ingredients like biotin and saw palmetto, a “natural plant extract that may potentially slow hair loss,” he says. Plus, it contains antioxidants like rosemary oil, which are good for calming an irritated scalp.

• Expert tip: Both the shampoo and conditioner are formulated at 1.5x strength, so use a very small amount to start.
• Key ingredients: Biotin, rosemary oil, saw palmetto, niacin
• Scent: Natural scent
• Safe for color-treated hair: Yes
• Size: 16 oz.
• Hair type: Best for thin, fine hair

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Pettis recently started using this color-safe product on clients and has “quickly fallen in love with it.” Besides smelling really good (it has an earthy, perfume undertone, she says), it contains a peptides bonder and amino acids that repair the molecular structure of the hair, restoring its strength and elasticity, she explains. Pettis used this strengthening shampoo on a client with color-treated hair, who “just kept raving” about how soft it left her hair feeling.

• Expert tip: This shampoo lathers really well, says Pettis, so start with a small amount. “A little goes a long way,” she says.
• Key ingredients: Peptides
• Smells like: Vanilla, floral
• Safe for color-treated hair: Yes
• Size: 16.9 oz.
• Hair type: Best for extremely dry, damaged hair

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