Hair Growth Products That Work, According To Experts Who’ve Tried Them All
I’ve worked in beauty for over a decade, and one of the questions I’m asked most often is: how can I get better hair? Longer, stronger, shinier, thicker, healthier — the wish list is endless. The reality is that a range of factors influence hair growth. Good habits like washing your hair regularly, taking care of your scalp, and eating a balanced diet can all help, but genetics plays the biggest role.
That doesn’t mean you can’t give your hair a helping hand. Brands from The Ordinary to Dove are investing heavily in products designed to support scalp health, hair growth, and density — areas that were once considered almost impossible to tackle. And while no serum can completely override your genetics, the anecdotal evidence behind some of these formulas is growing.
The challenge is knowing which ones are worth your time and money. With countless products promising longer, fuller hair in a matter of months, it can be difficult to separate the truly effective from the overhyped. To help cut through the noise, we asked hair experts to share the hair growth and density products they recommend most.
First of all, what affects how your hair grows?
Hair growth rate differs for everyone and can also change over a lifetime. Usually, though, factors like diet, overall health, and wellbeing — including conditions such as an underactive thyroid or deficiencies in nutrients like ferritin, vitamin B12, vitamin D, and zinc — all play a role. But much of your natural growth pattern is inherited. As for hair length, that’s governed by the duration of the anagen (or growth) phase, which can last anywhere from two to seven years.
Do hair growth products really work?
Aga Tompkins, a board-certified trichologist, says that minoxidil is one of the most clinically proven and extensively studied topical treatments for hair growth, but it’s not the only topical ingredient worth knowing about. “What we’re seeing now is growing interest in ingredients such as peptides, caffeine, red clover, rosemary oil, and pumpkin seed extract, which may help support healthier hair through different pathways,” says Tompkins.
Tompkins reminds her clients that healthy hair growth isn’t about one miracle product, though. Your shampoo and conditioner matter, too. “Your shampoo should be selected based on your scalp’s needs, whether it’s dry, oily, sensitive, or balanced, while your conditioner should be selected based on your strands, such as fine, medium, thick, or damaged hair,” says Tompkins. Ultimately, she says that treating the scalp and strands separately means you’ll get a more personalized approach to healthy hair growth.
What can you do about hair loss specifically?
It’s worth noting that if you’re experiencing hair loss, topical products can only do so much.
“Hair loss is often a symptom rather than a diagnosis,” says Tompkins, who adds that while genetics can play a role, thinning and excessive shedding can be linked to other things. “Think nutrient deficiencies, hormonal changes, thyroid disorders, stress, illness, medications, or other underlying health concerns,” she says.
As such, Tompkins always recommends consulting a dermatologist, trichologist, or healthcare provider if you’re experiencing sudden or persistent hair loss. “In many cases, blood work can help identify nutritional, hormonal, or medical factors that may be contributing to the issue,” says Tompkins, “allowing for a more targeted and effective treatment plan.”
The best hair growth products for a healthy scalp and fuller-looking hair
Certified trichologist Vanessa Ocando says that hair biology is deeply individual. “The same product can create completely different experiences from one person to the next,” she says, adding, “For example, minoxidil may deliver impressive regrowth with zero irritation for one person, while another might see mild irritation, dryness, or sensitivity even when they’re otherwise healthy.” That’s why she believes having a wide range of options — not to mention price points — matters
Whether you’re looking for a scalp-focused serum or hoping to improve hair density, these 11 expert-recommended products for hair growth could help you along your way.
Best for a balanced scalp & optimal follicle function: Nutrire T.2 Night Serum
“As a board-certified trichologist, one product I recommend is Nutrire T.2 Night Serum because healthy hair starts with a healthy scalp. This overnight treatment combines lactic acid for gentle exfoliation with ingredients such as rosemary oil, sunflower seed oil, tea tree oil, and pumpkin seed extract to help remove buildup, support scalp balance, and create a healthier environment for optimal follicle function. I love that it addresses several common barriers to healthy hair growth at once, from excess buildup and scalp irritation to hydration and follicle nourishment.” — Aga Tompkins, board-certified trichologist and director of salon service & education at Tricoci.
Best for creating the appearance of thicker, fuller hair: Nioxin Scalp + Hair Thickening System Kit
“Rather than relying on a single hero product for hair growth, I often recommend the Nioxin System Kits because they take a complete scalp-first approach to hair health. We know that healthy-looking hair starts with a healthy scalp, and many people experiencing thinning are also dealing with congestion, build-up, or excess oil that can affect how the hair looks and feels. The cleanser helps remove excess oil, product build-up, and impurities from the scalp; the conditioner provides lightweight hydration without weighing the hair down, and the leave-in scalp treatment helps create an environment where the hair can thrive. Using the full regimen consistently can leave the scalp feeling refreshed while helping hair appear thicker, fuller, and stronger over time, rather than chasing a quick fix.” — Neale Rodger, style director at STIL Salon.
Best for hair regrowth support: Calecim Professional Serum
“This serum is incredible. I’ve been using it for two years, and I’ve had loads of results with my clients. The easiest way to explain it is that it uses cell messaging to remind your follicles how to work like they did when they were younger. I think of our hair follicles like an orchestra, and you have different instruments playing. Over time, as we age or go through ill health or stress, those orchestra players leave the theater, and they might be the ones that control density or pigment that makes us go gray, or that keep our hair anchored so our hair sheds more. But this serum gives thousands of growth factors, proteins, exosomes, glycoproteins, and fibronectins to replace those members of the orchestra. It’s easy to use — one or two treatments a week — and the results are undeniable. Like anything, though, hair growth, it takes time. You can’t bionically charge up your hair growth to be faster than it was as its best, but my clients say that their hair is always healthier, better, and grows thicker.” — Tom Smith, hair longevity expert.
“This serum features an active ingredient called PTT-6, which is derived from stem cells and rich in growth factors and proteins, which promote hair growth. It not only calms inflammation of the scalp but also strengthens the hair and stimulates dormant follicles. For best results, apply to a clean scalp, ideally after washing, and gently massage the serum into the scalp using your fingertips for 30 to 60 seconds, or until it has been fully absorbed. Ensuring good contact with the scalp is more important than the exact amount used per section, as the active ingredients need to reach the hair follicles rather than sit on the hair strands.” — Hannah Gaboardi, trichologist.
Best for thinning edges and traction alopecia: CÉCRED Restoring Hair & Edge Drops
“I love the Cécred Restoring Hair & Edge Drops because they’re targeted at one of the most common concerns I see in clients: thinning edges and areas weakened by tension and styling. The formula is lightweight enough for daily use and combines strengthening ingredients like bioactive keratin ferment to help reinforce damaged hair with scalp-supporting actives like peptides to help improve the appearance of density over time. Rose water and ginger root extract also work to nourish the scalp and support healthier, fuller-looking growth.” — Lorraine Dublin, celebrity hairstylist, expert, and educator.
Best for boosting hair density and volume: Kerativ Redensify Treatment Serum
“This was developed from my experience as a practicing dermatologist and the questions I hear every day from patients. People are overwhelmed by hair loss options and often unsure which ingredients are actually supported by evidence. I wanted to create a formula that combined clinically studied ingredients with a scalp-first approach that’s easy enough to use consistently. The serum combines 3% Redensyl, a patented antioxidant complex designed to target hair follicle stem cells and support a healthy growth cycle, with 1% Kopexil (also known as Aminexil), a molecule structurally related to minoxidil that helps improve the appearance of hair density over time. We also incorporated ingredients like caffeine, adenosine, zinc, and pumpkin seed oil to support healthier-looking, fuller hair. It’s lightweight, non-greasy, color-safe, and can be applied to wet or dry hair without disrupting styling. In a 12-week clinical study with board-certified dermatologist evaluations, the serum was clinically shown to increase hair density and volume.” — Dr. Joyce Park, board-certified dermatologist at Skin Refinery and founder of Kerativ.
Best for maintaining a healthy scalp barrier: BÉSSA Beauty Cooling Scalp Serum
“If someone wants a medicated option, minoxidil remains the gold standard [for hair growth] with strong clinical data behind it. For those who prefer non‑medicated formulas backed by ingredient science, I usually recommend looking at vitamin‑rich, barrier‑supporting serums and gentle exfoliating treatments. [My hair health brand] BÉSSA Beauty [includes the] Cooling Scalp Serum, which combines vitamins B5, B3, and E with moisture‑rich lipids and copper tripeptides to support hair thickness and overall scalp vitality, plus willow bark to help break up buildup and maintain a clean, balanced scalp.” — Vanessa Ocando, certified trichologist and founder and CEO of BÉSSA Beauty.
Best for minimizing hair breakage: OneSkin Hair and Scalp Serum
“OneSkin Hair and Scalp Serum takes a distinct approach by focusing on scalp health and the biologic processes associated with hair aging. Its proprietary OS-01 peptide is combined with ingredients such as ginseng, biotin, antioxidants, and prebiotics to help support the scalp environment, reduce breakage, and improve the appearance of hair density over time. The lightweight, drug-free formula is also well-suited for patients looking for a non-prescription option.” — Dr. Anetta Reszko, board-certified dermatologist.
Best for maintaining a healthy scalp and supporting hair density: Obagi Nu-cil Biostim Scalp Serum
“I love this serum because it focuses on scalp health as well as hair growth. A healthy scalp is the foundation for stronger, fuller hair, and this formula helps hydrate, balance, and support the hair follicles thanks to a blend of active ingredients like circulation-boosting caffeine, moisturizing glycerin, and scalp-strengthening peptides. It delivers impressive clinical results [with testers reporting an improvement in hair volume] for hair density and overall scalp health.” — Caroline Hall, trichologist, nurse, and founder of R&R Aesthetics.
Best for boosting hair thickness: Typebea G1 Overnight Boosting Peptide Serum
“I’ve been using Typebea’s Overnight Boosting Peptide Serum and Strength & Length Shampoo for over a year now, and friends and family can’t get over how long, strong, and shiny my hair has become. It’s even more impressive considering I’ve always had short bob haircuts, and now my hair is just a few inches short of waist-length. The star ingredients in the serum are baicapil, salicylic acid, and provitamin B5. Baicapil provides a hydrating, smoothing effect on the hair fiber, which helps explain why my hair looks so glossy these days, but research also suggests the ingredient has shown promising results in reducing hair shedding. Salicylic acid exfoliates the scalp, while provitamin B5 helps maintain moisture and hydration and has a plumping effect on strands. When I rinse out the shampoo, my strands feel instantly thicker and fuller, and the effect lasts through styling.” — Jacqueline Kilikita, beauty director at Refinery29.
Best for preventing hair shedding: Dove Beauty Density Boost Scalp Repairing Hair Serum
“I was lucky enough to learn about Dove’s Density Boost Scalp Serum earlier this year at the American Academy of Dermatology conference, and after using it for two months (in tandem with my Act+Acre Scalp Dermastamp), I’m noticing less fallout, softer hair, and a more hydrated scalp. In addition to balancing niacinamide (aka vitamin B3), the formula has nourishing glycerin and itch-soothing zinc — a trifecta of scalp benefits. And at just $10? It’s worth every penny and then some.” — Karina Hoshikawa, senior beauty writer at Refinery29.
Best for shinier, stronger hair: Vara Ayurvedic Hair Oil Treatment
“For those who don’t want to use chemicals or take [any supplements], I always recommend Vara Naturals Ayurvedic Hair Oil. It is a weekly hair oiling treatment made with amla, brahmi, bhringraj, and hibiscus — herbs that have been trusted for centuries [in Indian medicine] to revive the scalp and restore hair’s vitality. I recommend sleeping with it in your hair and shampooing it out in the morning for healthy, thicker, shinier hair.” — Jae Manuel Cardenas, senior stylist at Ollin Salon NYC by Johnny Ramirez.
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