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Byrdie / Jessica Juliao
Acrylics, gel manicures, cold weather, or age can compromise nail health and lead to flimsy, peeling, and breaking nails. Infused with a host of essential vitamins and proteins, nail treatments can make nails harder, stronger, and healthier.
Byrdie Researched & Approved
Our best overall pick is Duri Rejuvacote 1, which contains two different proteins, calcium, and keratin to strengthen, stimulate growth, and remedy dryness and peeling. For a more affordable option, consider the drugstore favorite Sally Hansen Mega Strength Hardener with a fortifying diamond powder to keep your tips extra strong.
We conducted hours of research on the best nail strengtheners, evaluating formulas on active ingredients, ease of application, and results. Our team then combined these results with nail artist-recommended picks to create this list.
Ahead, find the best nail strengtheners to make brittle nails healthy again.
Best Overall
duri Rejuvacote 1 Original Maximum Strength Nail Growth System
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Courtesy of Amazon
Dries quickly
Seals in moisture
Minimizes dryness
Might peel for some
When it comes to nail strengtheners, this one can't be beaten. The tag line for this product reads "from dying nails to nails to die for," and we couldn't agree more. We reach for it time and time again, whether to use it as a rehab treatment post gels, as a base coat, or whenever our nails are bare and looking kind of blah. (To that point, it works as a solo treatment, as well as base and topcoat.)
What makes this product so magical? Two different proteins plus added calcium and keratin, which work together to stimulate growth. The formula also effectively seals in the moisture and fatty acids naturally produced by your nail plate to minimize dryness and peeling.
Price at time of publish: $14
Active Ingredients: Ethyl acetate, butyl acetate, keratin | Dosage: Once per day for a week | Size: 0.6 fl. oz. | Cruelty-Free: Yes | Byrdie Clean: No
Best Drugstore
Sally Hansen Mega Strength Hardener
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Various colors to choose from
Great brush
Affordable
Might dry and streak for some
Sally Hansen pretty much owns the drugstore nail category, so it's no surprise that they offer a few different nail strengtheners. This one gets our vote, infused with a fortifying diamond powder to keep your tips extra strong. Bonus points for the extra-wide brush that makes application a breeze, as well as the wallet-friendly price.
Price at time of publish: $9
Active Ingredients: Ethyl acetate, butyl acetate, diamond powder | Dosage: Two coats | Size: 0.4 fl. oz | Cruelty-Free: No | Byrdie Clean: No
Best Drugstore, Runner-Up
Orly Nail Defense Nail Strengthener
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Ulta
Great brush
Affordable
Adds shine
May take some time to work
Affordable and effective, this is a protein-packed treatment that happy reviewers say helps their nails grow and not peel or split. It works as a base coat, although the extra shiny finish of this means it looks like you're wearing a clear polish if you do want to sport it solo. It also has the brand's special grippy brush that makes precise swiping a breeze.
Price at time of publish: $13
Active Ingredients: Ethyl acetate, butyl acetate, horsetail extract | Size: 0.6 fl. oz. | Cruelty-Free: Yes | Byrdie Clean: No
Best for Peeling Nails
Nails Inc. Nailkale Superfood Base Coat
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Courtesy of Sephora
Minimizes dryness
Adds shine
Promotes nail growth
Strong scent
True to its name, it does contain kale extract. Coupled with other antioxidant-rich botanical extracts plus strengthening keratin, the formula delivers five different benefits: hardening, hydrating, and nourishing nails, while also stimulating growth and preventing breakage. While it has a minty tint in the bottle, the base coat goes on clear, imparting nails with a healthy, glass-like sheen.
Price at time of publish: $20
Active Ingredients: Butyl acetate, ethyl acetate, pomegranate extract | Dosage: Two coats three times per week | Size: 0.5 fl. oz | Cruelty-Free: Yes | Byrdie Clean: No
Best for Natural Nails
OPI Natural Nail Strengthener
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Courtesy of Ulta
Dries quickly
Prevents staining and discoloration
Applies smoothly
Might peel for some
Strong scent
If you like to keep things simple, aren't sporting acrylics or lots of gels, and just want something to make your natural nails look that much better, try this formula. Along with protecting nails to ensure long, strong growth, it also pulls double duty as a great base coat, preventing staining and discoloration while helping color adhere better.
Price at time of publish: $12
Active Ingredients: Ethyl acetate, butyl acetate, camphor | Size: 0.5 fl. oz | Cruelty-Free: No | Byrdie Clean: No
Best Kit
Zoya Naked Manicure Women's Starter Kit
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Amazon
Dries quickly
Applies smoothly
Shiny finish
Might peel for some
Strong scent
To create the look of truly healthy nails—no matter how beat up they might be—reach for this four-step system. Step one is a nutrient-packed base coat full of vitamins, proteins, and amino acids that keeps nails both strong and flexible to ward off peeling and breakage. Follow that with the pink perfector, applied all over to instantly brighten nails and the tip perfector along the free edge to enhance the white tip. A shine-enhancing top coat seals the deal for a result that makes it look like you're not wearing any polish at all—just that you have the most natural, gorgeous nails ever.
Price at time of publish: $30
Active Ingredients: Ethyl acetate, butyl acetate, sunflower oil | Size: 0.5 fl. oz | Cruelty-Free: Yes | Byrdie Clean: No
Best Polish
Essie Treat Love & Color
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Courtesy of Ulta
Applies smoothly
Various colors to choose from
Fast results
Might dry and streak for some
For some people, the idea of sporting bare nails is simply unfathomable. We get it, and that's why we love that Essie offers this nail treatment polish. It can decrease peeling by 60% and breakage by 35% in just one week; credit collagen and camellia extract. Not to mention that it comes in 32 different hues, all offering a sheer wash of gorgeous color along with these benefits. Plus, you don't even need a base or topcoat with it.
Price at time of publish: $14
Active Ingredients: Ethyl acetate, butyl acetate, collagen | Dosage: Daily for one week | Size: 0.5 fl. oz | Cruelty-Free: No | Byrdie Clean: No
Best Base Coat
Butter London Horse Power Nail Rescue Base Coat
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Courtesy of Ulta
Protects against future damage
Dries quickly
Shiny finish
Runny texture
Slow results
If you like to have your nails polished at all times, then you're probably wearing a base coat at all times. And if you're doing that, you might as well make it a base coat with benefits, like this guy. There are four key ingredients in the formula: horsetail extract and biotin to promote healthy growth, plus vitamin B and calcium. If your nails are on the struggle bus, this will for sure help transform them, but if they're already in good shape, this will help keep them that way.
Price at time of publish: $19
Active Ingredients: Ethyl acetate, butyl acetate, biotin | Dosage: One coat | Size: 0.5 fl. oz | Cruelty-Free: Yes | Byrdie Clean: No
Best Base Coat, Runner-Up
Dr.'s Remedy Enrich Nail Polish Hydration Nail Moisture Treatment
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Dries quickly
Shiny finish
Hydrating
Might streak and peel for some
This effective formula, a favorite of celebrity nail artist Elle Gerstein, relies on biotin, wheat protein, and pentavitin to help keep nails long and strong. "I use this as a base coat, especially during the cold winter months, to help seal moisture into my nails," she says.
Price at time of publish: $25
Active Ingredients: Ethyl acetate, butyl acetate, biotin | Size: 0.5 fl. oz | Cruelty-Free: Yes
Best for Nail Biters
Barielle No Bite Pro Growth
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Prevents nail biting
Fragrance-free
Promotes nail growth
Bitter taste when eating finger food
For those who tend to nibble on their nails, this treatment is choice. While it goes on invisible and odorless, it has a nasty, bitter taste that will definitely discourage biting. It's also infused with ingredients to boost growth and strength, helping to transform your nails from bitten down and brittle to long and strong, all in one step.
Price at time of publish: $10
Active Ingredients: Ethyl acetate, butyl acetate, silica | Size: 0.5 fl. oz | Cruelty-Free: Yes | Byrdie Clean: No
Best Tinted
Pear Nova Enhance Nail Strengthener
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Pear Nova
Affordable
Subtle tint makes nails look healthy
Minimizes dryness
Brush could be a little denser
The aloe vera in this formula makes this a nice option for combating dryness. But it's the (super subtle) pink hue that gets us excited about this pick. It's not color—to that point, this can easily be layered under polish in place of a base coat—but it's just enough to make your nails look healthy and almost glowy. Think of it as the nail equivalent of a tinted moisturizer.
Price at time of publish: $14
Active Ingredients: Aloe | Size: 0.34 oz. | Cruelty-Free: Yes | Byrdie Clean: Yes
Best for All Nail Issues
Olive & June Nail Strengthener
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Olive & June
Addresses multiple nail issues
Easy to hold cap
Must be applied daily for best results
If your nails have breakage, peeling, white spots, or ridges, reach for this guy. Credit a variety of plant-based extracts, including celery seed extract, that help strengthen nails—up to a 77% increase in nail strength, according to the brand.
Price at time of publish: $14
Active Ingredients: Ethyl acetate, celery seed extract | Cruelty-Free: Yes | Byrdie Clean: No
Best 17-Free
Ella + Mila First Aid Kiss Nail Strengthener
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Ulta
17-free
Affordable
Slow results
You've likely heard of 5-free and 7-free and even 8-free polishes. Buckle up because this formula is, wait for it, 17-free. It contains good-for-your-tips vitamin E and is great for weak, thin, and splitting nails. FYI, it's best when used for four weeks, which can feel a bit tedious, though the results are worth it.
Price at time of publish: $11
Active Ingredients: Ethyl acetate, butyl acetate | Cruelty-Free: Yes | Byrdie Clean: No
Best for the Entire Nail Area
CND RescueRXx Daily Keratin Treatment
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Courtesy: Ulta
Can use on skin and nails
No dry time
Can't use as a base coat
Think of this as a cuticle oil-nail strengthener hybrid. The base is jojoba and sweet almond oils, both of which impart tons of moisture not only to the nail but to the surrounding skin, too. But unlike a cuticle oil, there's protein-rich keratin in the mix to help bolster the strength of the nail. All you have to do is swipe it on (truly, as haphazardly as you want since you can't mess this up) and rub it into the nail and entire nail area. Do so daily and prepare to be amazed by how much better your nails look.
Price at time of publish: $21
Active Ingredients: Sweet almond oil, keratin | Size: 0.5 fl. oz. | Cruelty-Free: No | Byrdie Clean: Yes
Best Nontoxic
Lisa Lacquer Nail Strengthener
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Lisa Lacquer
Can used as a base coat
10-free
Slow results
All colors in this line are 10-free and contain no toxic ingredients. We love this strengthener, which can double as a base coat, for containing vitamin A, which has been found to be effective in treating splitting nails, making them grow healthier and stronger.
Price at time of publish: $10
Active Ingredients: Vitamin A | Size: 0.43 fl. oz. | Cruelty-Free: Yes | Byrdie Clean: Yes
Best for Cuticles
Peacci The GelBottle Oil
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Peacci
Nice smell
Absorbs quickly
Contains dyes
This formula softens cuticles and locks in moisture with a rich blend of natural oils. We especially love this treatment for those who have acrylics to use on cuticles, and on nails in between appointments. Reviewers note the non-greasy texture is fast-absorbing into nails and skin.
Price at time of publish: $13
Active Ingredients: Coconut oil, freesia, peach oil, tea tree Oil, | Size: 0.5 fl. oz. | Cruelty-Free: Yes | Byrdie Clean: No
Onyx Professional Hard as Hoof Nail Strengthening Cream
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Courtesy: Amazon
Price at time of publish: $8
ISDIN SI-NAILS Nail Strengthener
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Courtesy: Amazon
Price at time of publish: $32
Essie Strong Start Nail Treatment Base Coat
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Essie
Price at time of publish: $11
Sally Hansen Advanced Hard as Nails
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Courtesy: Walmart
Price at time of publish: $3
OPI Nail Envy, Nail Strengthener, Nail Treatment
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Price at time of publish: $19
Deborah Lippmann Hard Rock Hydrating Base and Top Coat
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Deborah Lippmann
Price at time of publish: $22
Final Verdict
Our best overall pick is Duri Rejuvacote 1, which contains two different proteins, calcium, and keratin to strengthen, stimulate growth, and remedy dryness and peeling. For a more affordable option, consider the drugstore favorite Sally Hansen Mega Strength Hardener with a fortifying diamond powder to keep your tips extra strong.
Meet the Expert
Celebrity nail artist Elle Gerstein is a media expert featured in top magazines for her knowledge of nail care.
What to Look For in a Nail Strengthener
Clinically-tested Products
Gerstein notes many products make lots of promises without any hard evidence to back up those claims. Do your research to see which companies have tested their products. It's the best way to know if you're getting something that contains key ingredients and is going to work, she says.
Proteins
To the ingredients point, it's ideal to seek out proteins in any nail strengthener like keratin and wheat protein since your nails are primarily made of protein.
Biotin
Biotin is another tried-and-true nail enhancing ingredient, great for helping to promote healthy nail growth.
Why Trust Byrdie
Byrdie contributor Melanie Rud has over a decade of experience in the beauty industry, writing for some of the biggest magazines and websites out there. She considered dozens of nail strengtheners for this roundup, evaluating each on its formula of active ingredients and results.