The 18 Best Hair-Growth Oils for Stronger, Thicker Strands, Tested by Trichologists Themselves

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Healthy, luminous locks begin at the scalp—but achieving stop-and-stare hair is rarely as simple as adding a single product to your routine. With countless oils, serums and treatments promising everything from rapid regrowth to thicker, fuller strands, the category has become increasingly crowded—and oftentimes, confusing.

While some formulas are grounded in clinical research and thoughtfully selected ingredients, others rely more on marketing than measurable results, making it difficult to know what’s truly worth your investment. And really, what’s more frustrating than reading one more label while watching your pillowcase collect new tufts of your former tresses each morning? No, thank you.

To cut through the noise, we spoke with leading trichologists about the ingredients that actually work and the products with proven results. These hair-growth experts spend their days studying the science of the scalp and follicles—so who better to turn to for real-world clinical insights and recommendations for treating thinning, shedding and breakage?

We also tapped top stylists for their perspective on how to use these treatments effectively, because even the most advanced formula won’t deliver results if it’s applied incorrectly.

The takeaway: while no oil or serum can deliver overnight transformation, the right formula—paired with consistent, strategic use—can help improve scalp health, strengthen strands and create the ideal conditions for fuller, healthier-looking hair over time.

Ahead, the expert-approved hair-growth oils and scalp treatments that stand out for their ingredients, performance and proven results.

Related: What Women Should Never Do To Avoid Thinning Hair

Top Hair-Growth Oils

• Best Overall:Nulastin Scalp Treatment
• Best Splurge:The Scalp Treatment by Augustinus Bader
• Best Overnight Treatment:Aveda Overnight Scalp Renewal Serum
• Best for Follicle Support:Spoiled Child A22 Biotin Boost Hair + Scalp Serum
• Best Soothing Formula:Privé Scalp Reboot Serum
• Best Peptide Treatment:Snow Fox Tetrapeptide & Ginseng Hair and Scalp Serum
• Best All-Natural Solution:Kilgour MD Scalp Serum
• Best Science-Backed Topical: Plated Hair Serum
• Best Budget:Pure Australian Emu Oil
• Best Hair Oil Cocktail: Forest and Shore Hair Growth Oil
• Best Scalp Serum:Advanced Trichology HairStem Serum
• Best for Reduced Shedding:The Nue Co. Supa Thick Hair Serum
• Best Multi-Tasker: Viva Naturals Organic Coconut Oil
• Best for Fine Hair: Nutrafol Hair Serum
• Best for Fuller-Looking Hair:Vegamour Gro Hair Serum for Hair Thinning
• Best for Thinning Edges:Cécred Restoring Hair & Edge Drops
• Best for Split Ends: Kerastase Nutritive Split Ends Hair Serum
• Best Lightweight: Keranique Radiant Repair Oil

What Causes Hair Thinning and Shedding?

There’s no sugarcoating it: hair loss at any stage can be incredibly frustrating and, at times, confusing. It often sends people down a rabbit hole of products that promise miracle regrowth or treatments that claim to coax new strands to sprout. But before trying everything under the sun, understanding where the issue originates—whether at the follicle or along the hair shaft—is key to identifying the right treatment and restoring healthier, stronger hair.

“Hair thinning, shedding and breakage may look similar, but they often stem from very different causes,” explains Tesha Avery, certified trichologist at the North Carolina Hair Loss Center. “Thinning is frequently linked to genetics, hormonal changes or underlying health conditions, while shedding is commonly triggered by stress, illness, postpartum shifts or nutrient deficiencies.” Breakage, on the other hand, typically occurs along the hair shaft and is often the result of mechanical damage, heat styling, chemical processing or dryness, she adds.

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Ingredients To Look for in Hair-Growth Oils

When evaluating hair growth oils, it’s important to focus on ingredients backed by both clinical research and emerging science.

“The ingredient with the strongest clinical evidence is minoxidil, which is FDA-approved for hair regrowth,” explains Avery. “Caffeine has emerging research suggesting it may help stimulate hair follicles, while certain peptides and rosemary extract show promising support for circulation and overall follicle health.”

She adds that some newer formulations are incorporating plant-based stem cell extracts designed to support the scalp environment—though research in this area is still evolving. Ultimately, results depend on the underlying cause of hair loss and consistent, long-term use.

What Makes a Hair-Growth Oil Effective?

As much as we’d love instant results from a single drop applied to the scalp, hair oils take time to work their magic—and consistency is key, say experts.

“A hair-growth oil works best when it supports the health of the scalp—the environment where hair actually grows,” explains Avery. While oils don’t directly make hair grow faster, they can help improve circulation, reduce dryness, protect the scalp barrier and minimize breakage. When used regularly as part of a scalp-care routine, nourishing oils help create the conditions for stronger, more resilient strands over time, she adds.

Related: The Best Way to Cover Bald Spots in Thinning Hair—No Matter Your Age

How To Use Hair-Growth Oils for the Best Results

So you’ve found the right hair growth oil—now it’s all about how you use it. According to Kerry E. Yates, trichologist and founder of Colour Collective, application timing is key: serums and oils should be the final step in your routine to allow them to fully absorb and do their job.

“If applying in the morning, use them before setting the hair,” she says. “If applied at night, they should be topically applied before bed.” What you shouldn’t do is rinse them out immediately. “Do NOT apply the serum and then wash your hair,” she adds. “I liken it to using a moisturizer on your face and then cleansing your skin right afterward.”

Technique matters just as much as timing. Celebrity stylist Marc Ballance recommends applying oils directly to the scalp in sections, focusing on the roots. “Then massage with your hands to make sure the product actually contacts the scalp—not just the hair,” he explains. “These products are for the root and scalp, so really work them in.”

As for when and how often to use them, there’s no one-size-fits-all approach. Ballance prefers applying oils to a slightly damp scalp but notes that results ultimately depend on the formula. Both morning and nighttime applications can be effective, as long as the product has time to absorb. Frequency should also be tailored to your hair type—those prone to oiliness may want to limit use to a few times per week, while others can apply more as needed.

When it comes to how long to leave oils on, follow the product’s instructions. Growth-focused formulas are typically designed to be left in, while richer oils can double as conditioning treatments and may only need 10 to 15 minutes before rinsing. The goal, experts agree, is consistent, targeted use that supports scalp health over time.

Styling Mistakes That Can Make Hair Loss Look Worse

Constant tension is one of the most common culprits, according to master colorist and founder of LRN Beauty in New York City, Lauren Paglionico. Tight ponytails, while convenient, can put stress on the hairline and lead to long-term damage. “I love a pony, but that tension can cause permanent damage,” she says, suggesting a loose braid as a gentler alternative—especially during workouts.

Another often-overlooked issue is not washing your hair frequently enough. When you’re experiencing thinning, buildup from oils, sweat and styling products can accumulate on the scalp, making hair appear thinner and potentially worsening the condition. Keeping the scalp clean and balanced is key to maintaining healthier-looking hair.

The 18 Best Hair-Growth Oils, Tested by Trichologists

Best Overall: Nulastin Scalp Treatment, $136

For those with naturally fine strands or roots that easily get weighed down, NYC-based trichologist Shab Caspara recommends Nulastin’s fast-absorbing formula. Powered by the brand’s Elastaplex technology, the treatment combines proteins and signal peptides designed to help anchor hair follicles and reinforce them at the root.

Best Splurge: The Scalp Treatment by Augustinus Bader, $93

If luxury scalp care is on your radar, Yates points to Augustinus Bader’s cult-favorite treatment for its science-backed formula and skin-care approach to hair health. “It supports follicle health and helps maintain moisture balance on the scalp,” she explains.

Formulated with antioxidants to defend against environmental stressors, it treats the scalp with the same level of care typically reserved for facial skin.

Best Overnight Treatment: Aveda Overnight Scalp Renewal Serum, $42

Designed to work while you sleep, this lightweight treatment helps maintain a healthy scalp microbiome while soothing irritation and supporting proper moisture balance. Yates notes that it’s suitable for all hair types and appreciates that the formula has been reviewed by a dermatologist, making it a reliable option for anyone looking to strengthen their scalp-care routine overnight.

Best for Follicle Support: SpoiledChild A22 Biotin Boost Hair + Scalp Serum, $66

Think of this vitamin-packed formula as a daily multivitamin for your scalp. According to Yates, the serum’s blend of biotin and supportive nutrients is designed to promote a healthy hair life cycle while strengthening follicle function—an important factor for anyone experiencing thinning or fragile strands.

Best Soothing Formula: Privé Scalp Reboot Serum, $19

For anyone dealing with sensitivity or irritation, this vegan scalp serum delivers a calming blend of natural ingredients designed to reduce inflammation and rebalance the scalp environment. Yates also loves that it comes with a dedicated scalp-massaging brush, making it easier to distribute the formula while stimulating circulation.

Best Peptide Treatment: Snow Fox Tetrapeptide & Ginseng Hair and Scalp Serum, $88

Another standout option for those experiencing thinning or compromised follicles is Snow Fox’s peptide-powered treatment. “The formula combines peptides with natural actives to support optimal scalp health and follicle fitness,” Yates says.

It’s easy to apply, relatively cost-effective and designed to be used consistently—though she notes that most users should allow up to 90 days to see noticeable improvements.

Best All-Natural Solution: Kilgour MD Scalp Serum, $60

Seeking hair replacement solutions without a lot of scary chemicals involved? Caspara co-signs Kilgour MD’s Scalp Serum for its ability to combat hair thinning, while replenishing sparse areas.

“The perfect unmedicated, all-natural replacement to hair loss medications like finasteride, spironolactone and dutasteride,” she says, noting that its clinically studied active ingredients support 200%+ hair follicle growth, with no side effects reported in a peer-reviewed trial.

Another bonus? It’s ideal for men dealing with pattern baldness at the hairline and crown areas who want to stop using medications or have not had success with them.

Best Science-Backed Topical: Plated Hair Serum, $379

Caspara calls this potent vial a true next-generation treatment, powered by platelet-derived exosomes and proprietary Renewosome technology to deliver visibly thicker, fuller-looking hair while supporting overall follicle function.

The formula is further enhanced with biotin to reinforce the scalp barrier, hyaluronic acid to deeply hydrate and soothe and panthenol (vitamin B5) to improve strength and flexibility. “It also contains nourishing ingredients to preserve scalp health,” she explains.

Use once daily for those experiencing active or chronic thinning.

Best Budget: Pure Australian Emu Oil, $15

When it comes to affordable yet effective hair growth solutions, pure Australian emu oil stands out as a powerful contender. According to celebrity trichologist William Gaunitz, FWTS, emu oil is one of the most effective oils for supporting hair regrowth due to its unique ability to deeply penetrate the scalp—especially when its warmed to room temperature.

“I’ve used it in my clinics for multiple inflammatory scalp conditions and to support hair growth,” Gaunitz explains, highlighting its versatility and clinical credibility.

Best Hair Oil Cocktail: Forest and Shore Hair Growth Oil, $29

“This oil has many fantastic ingredients for supporting hair growth,” says Gaunitz, pointing to the inclusion of caffeine and biotin alongside castor and rosemary oils, which help support overall scalp health and encourage regrowth.

Together, this well-rounded blend works to energize the scalp, strengthen strands and create a more balanced environment for consistent growth over time. It’s an easy, all-in-one option for anyone looking to streamline their routine without sacrificing performance.

Best Scalp Serum: Advanced Trichology HairStem Serum, $50 

While not a traditional hair oil, this scalp-focused serum delivers many of the same benefits—thanks to a potent concentration of essential oils at the core of its formula.

The blend is carried in an alcohol-based herbal tincture, designed to enhance absorption and deliver active ingredients directly to the scalp. From a clinical standpoint, it helps minimize the impact of DHT, reduce inflammation and create a healthier environment for hair growth. The inclusion of essential oils also supports the topical delivery of key nutrients, including vitamin D3 and vitamin B5, to nourish the follicles.

“I use this product as my go-to scalp serum for most hair loss conditions,” says Gaunitz, underscoring its versatility and efficacy.

Best for Reduced Shedding: The Nue Co. Supa Thick Hair Serum, $44

While no topical can promise instant regrowth, the right formula can help support the scalp during periods of temporary shedding. “Growth oils may help with short-term hair loss caused by hormonal changes, stress, shifts in diet, illness or even anesthesia,” says Paglionico.

“I’m very particular about what I recommend and will only suggest The Nue Co. Supa Thick Hair Serum to my clients,” she adds, noting that the science-backed formula uses Redensyl, clary sage and lactic acid to support the scalp environment, while rosemary, peppermint and camellia oils help boost circulation.

Best Multi-Tasker: Viva Naturals Organic Coconut Oil, $10

A classic for a reason, Yates calls coconut oil a great natural emollient. “It’s the perfect partner for hair oiling treatments, when applied to wet hair,” she explains.

Not only does it detangle like a pro, but it helps prevent breakage and further hair loss, while instantly improving hair’s manageability, suppleness and shine.

Best for Fine Hair: Nutrafol Hair Serum, $49

Although Avery can attest to Nutrafol’s proven track record for encouraging new growth in sparse areas of fine hair, she warns that the most common mistake with this lightweight serum is overuse.

“Applying too much oil can weigh the hair down,” she cautions. “Instead of dropping oil directly onto the scalp, put a small amount in your hands, rub it between your fingers and gently massage a thin layer into the scalp. A little goes a long way.”

Best for Fuller-Looking Hair: Vegamour Gro Hair Serum for Hair Thinning, $64

On the more splurge-worthy end of the spectrum, this popular serum has earned a loyal following for its plant-based approach to thicker-looking hair. Avery highlights it as a standout: “It’s one of the higher-end options designed to support fuller-looking hair.”

The formula combines turmeric to help improve the appearance of density, caffeine to energize the scalp, and a proprietary blend of red clover and mung bean to nourish follicles and support healthier-looking strands.

Clean and vegan, the serum is designed to reduce the appearance of shedding and promote visibly thicker, fuller hair—with results often reported in as little as 90 days.

Best for Thinning Edges: Cécred Restoring Hair & Edge Drops, $56

The hairline is often the first area to show signs of stress, making targeted care essential. Cécred’s lightweight, nutrient-rich formula is designed to support fragile follicles, smooth breakage and promote healthier-looking edges over time—without weighing hair down.

Our experts emphasize that consistency is key with treatments like this. “All five of these options can support thinning at the crown when used consistently as natural topical treatments,” says Avery. “However, if thinning is advanced or progressive, it may be time to consult a dermatologist for a prescription-based or customized topical treatment.”

Best for Split Ends: Kerastase Nutritive Split Ends Hair Serum, $49

Kérastase’s Split Ends Serum is designed to nourish dry, damaged ends while helping reduce the appearance of thinning caused by breakage. As Gretchen Friese-Oligee, hairstylist, certified trichologist and hair loss expert, notes, strengthening fragile ends is key to maintaining fuller-looking hair.

When choosing a hair oil or serum, it’s important to consider your hair texture. “Fine hair typically benefits from lightweight formulas that won’t weigh it down, such as The Ordinary Multi-Peptide Serum for Hair Density or K18 Molecular Repair Hair Oil. Thicker or coarser hair, on the other hand, can handle richer, more nourishing options like Kérastase’s Nutri-Supplement Split Ends Serum for added smoothing and repair,” she says.

Best Lightweight: Keranique Radiant Repair Oil, $30

Many hair-growth oils can feel heavy or sticky—which is the last thing you want coming in contact with your pillow at night—but lightweight options do exist. “I like Keranique Radiant Repair Oil,” says Friese-Oligee. “It helps to moisturize and strengthen the hair, which reduces hair thinning due to breakage.”

For more targeted scalp care, she adds that BosleyMD Follicle Energizer is another option worth considering: “It contains caffeine and biotin to help areas of thinning when applied to the scalp.”

Up Next:

Related: The 11 Best Hair-Growth Shampoos for Thinning, Breakage and Shedding—Tested by Trichologists

Sources:

• Tesha Avery, certified trichologist at North Carolina Hair Loss Center
• Kerry E Yates, trichologist and founder of Colour Collective
• Marc Ballance, celebrity stylist at IGK Hair in New York City
• Shab Caspara, board-certified, NYC-based trichologist and hair growth expert
• Lauren Paglionico, master colorist and founder of LRN Beauty
• William Gaunitz, FWTS, celebrity trichologist and leader in the hair loss space with over 20 years of experience
• Gretchen Friese-Oligee, Bosley MD’s certified trichologist and go-to education authority on all things hair loss and hair thinning