Here's Exactly How to Grow Thicker, Longer Hair

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How to get thicker hair is common question many beauty enthusiasts find themselves frequently asking their stylists—and there's no one answer for everyone.

From applying weekly hair masks and scalp oils to taking supplements and using thickening shampoos, most of us are willing to do just about anything to get hair its most lucious. But the biggest expert tip to maximize length and volume? Keep things simple. “Less is more when it comes to promoting hair growth, but compliance is key,” Debby Vellozzi, head of product development at Virtue Labs, tells Bazaar. “Growth products are meant to be used daily and while it takes time, they truly work.”

Here, we speak with celebrity hair stylists along with a professional trichologist to demystify everything to know about growing thicker, longer hair with ease. And to round out your care essentials, we've also included some expert-approved products you can seamlessly add to your routine.

Eat Smarter

We have great hair news for avocado fanatics. According to Michelle Blaisure, product and technical specialist and certified trichologist for Bosley Professional Strength, a diet full of healthy fats is essential for thick and healthy hair. “While genetics determines hair texture and curl, our diet plays a role in how genes can get expressed,” Blaisure says. “Be sure to get plenty of good-quality protein and good fats like olive oil and omega-3s.” She recommends salmon, avocados, nuts, vegetables, and fruits to get all the key nutrients needed for growing stronger hair.

Use the Right Shampoo and Conditioner

It sounds obvious but bears repeating: Different hair types require specific products that cater to their exact needs. Cutler x Arlo Salon co-owner Jenny Balding says those with fine hair should look for volume-building shampoo and conditioners, such as the Kérastase Bain Densité Shampoo, to boost the appearance of thickness and add shine. For those with coarse hair, Balding suggests products that tame frizz and moisturize, like Living Proof’s Perfect Hair Day Conditioner and finish with a nourishing cream. A good rule of thumb is to pick a shampoo that gently cleanses the scalp and a conditioner that boosts hydration (applied to the mid-lengths to the ends), says Lars Skjoth, the CEO and founder of Harklinikken.

Bain Densité Shampoo

Perfect Hair Day Conditioner

Leave-In Conditioner

Don’t Over-Wash

Too much of a good thing can harm your hair. According to Lucy Flora, stylist at Suite Reyad at the Pierre Hotel in New York City, the number-one mistake she sees clients make is over-washing.

“There is nothing better for shine than the hair’s natural oils,” Flora says. You can help distribute the natural oils by gently brushing your hair regularly (more on that below). Just don’t go more than a few days before a shampoo; you still need to rinse away product buildup to maintain a healthy scalp.

Start with Your Scalp

When it comes to hair growth, don’t sleep on your scalp. (Well, you know what we mean.) The scalp has a rich microbiome of bacteria and fungus necessary to keep the skin—and hair it grows—healthy, explains Blaisure. When we don’t shampoo enough or use harsh cleanser, it leads to skin problems that negatively affect hair growth. “The skin has immunity functions and is our first line of defense against toxins and environment aggressors. When the scalp is compromised, the scalp cannot defend itself,” she says. “Keeping a healthy balance of moisture and natural oils is important on the scalp just as it is on your face.”

She blames overuse of hair stylers and harsh cleaning agents (think: sulfates) for stripping the hair and disrupting the scalp’s pH balance. She recommends limiting thickening products that leave behind a heavy residue and make hair look dull, as well as anything with a high pH level.

Linda de Zeeuw, master stylist at Rob Peetoom in Brooklyn, suggests massaging your scalp to activate blood flow and to avoid washing your hair more than three times a week. De Zeeuw also warns against overusing dry shampoo—heartbreaking, we know—as it can build up a layer of residue on your scalp and clog hair follicles, preventing new, healthy hair from growing.

Get Your Blood Flowing

Before you stock up on promising products, try giving yourself a scalp massage, which encourages blood flow and helps break up scar tissue in the hair follicle to promote thickness. With your fingertips, move in small circular motions with a moderate amount of pressure. And although scalp massaging tools have grown in popularity, Skjoth warns that sharp rubber devices or metal massaging devices can potentially damage the follicles and prevent hair growth. “When done the right way, a regular scalp massage can work wonders for microcirculation of the hair follicles especially when used in conjunction with a serum like the Harklinikken Hair Gain Extract,” he adds.

Read the Ingredient List

Skjoth recommends avoiding products that contain silicones, artificial colors, or—if you're sensitive—fragrance. “These ingredients can cause scalp issues, which can sometimes cause dermatitis, folliculitis (infection of the hair follicle), and if left untreated can lead to permanent loss of hairs in the inflicted hair follicles.”

Instead, look for ingredients that boast anti-inflammatory properties, which stabilize the scalp microbiome and balance excess sebum that often plays a part in hair thinning. The Harklinikken Stabilizing Shampoo features extract from burdock root to sooth and reduce inflammation.

Try a Hair-Growth Supplement

Taking a daily multi-vitamin along with a hair supplement can make a big difference, according to Balding. Blaisure agrees, adding that certain vitamins, minerals, and fatty acids are necessary for healthy hair follicle function and growth. “These need to be added for many people along with a healthy diet,” she says.

Women Hair Growth Supplements

Nutrafol Women Hair Growth

Hair Growth Supplements

Women's Hair Growth Supplements

Hair Growth Vitamin Supplements

Significant Other Skin, Hair & Nails Supplements

Choose something like the Bosley Professional Strength Healthy Hair Vitality Supplements, which are high in anti-inflammatory omega-3 and horsetail and pumpkin seed extract, or Viviscal, which contains a proprietary collagen complex to support healthy hair growth. We also love Nutrafol, which won a Bazaar Hair Award in 2021. Nearly every dermatologist we interviewed agrees: In a sea of powders, gummies, pills, and shots promising thicker and fuller hair, Nutrafol is the one that most consistently delivers expert-level results.

Be patient: Results from pills can take three to six months—and you’ll need to keep popping them to maintain your new hair growth.

Minimize Hot Tools

We know it can be hard to break up with your hair dryer or flat iron. But if you truly want healthier hair, start writing that breakup text. “Keeping hot tool use at a minimum will lessen hair damage,” Balding says. “It will make a huge difference.” She stresses that if you cannot stay away from your favorite hot tools (guilty), it’s crucial to use a heat-protectant spray, like Moroccanoil Perfect Defense, and a hot tool brand that regulates heat and temperature evenly, like the T3 SinglePass Flat Iron. We also love the Dyson Airwrap, a styling tool-and-dryer hybrid that uses air and minimal heat to dry and curl hair.

Moroccanoil Perfect Defense Heat Protectant 6 oz/ 225 mL

Singlepass Compact

Airwrap Multi-styler Complete Long Diffuse

Brush with Purpose

When’s the last time you actually gave thought to brushing your hair? Regular and deliberate brushing can affect your hair’s thickness, Blaisure says, because it helps distribute the natural oils that will help protect it from damage and add shine. Brushing every day, regardless of your hair texture, will also help exfoliate the scalp and remove dead hair.

But it’s only helpful if you’re using the right brush. Flora likes using a round ceramic brush like the Ibiza Hair Cork Series to help create shine while doing a blowout. Zeeuw suggests using a boar-bristle brush, like the cult-favorite Mason Pearson. “It polishes the hair and adds a natural glow, because you are dispersing the natural oils from the scalp into the hair,” she says. As for the biggest brushing faux pas? “Don’t use a plastic brush,” she says. “That will damage your hair and make it staticky.”

Fake It 'Til You Make It

When creating the illusion of thicker hair, Flora says to use something lightweight that will plump the hair at the root without weighing hair down (we like GHD Body Goals Total Volume Foam). To finish off a look, she likes to use a thickening texture spray, like Fekkai Full Blown Volume Dry Texturizing Spray, for even more added volume.

Body Goals Total Volume Foam

Full Blown Volume Dry Texturizer Spray

Dry Texturizing Spray

Thickening Dryspun Volume Texture Spray

Meet the Experts

• Michelle Blaisure is a product and technical specialist and certified trichologist for Bosley Professional Strength.

• Jenny Balding is the co-owner of Cutler x Arlo Salon.

• Lars Skjoth is the CEO and founder of Harklinikken.

• Lucy Flora is a stylist at Suite Reyad at the Pierre Hotel in New York City.

• Linda de Zeeuw is a master stylist at Rob Peetoom Salon in Brooklyn, New York.

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For more than 150 years, Harper’s Bazaar has been the preeminent fashion and beauty resource for women at every age. We cover what’s new and what’s next in beauty by working with the world’s leading authorities in dermatology, plastic surgery, cosmetics, skincare, hair care, and fragrance. Every story we publish has been thoroughly researched and vetted by our team of beauty editors and industry experts.

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