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Topical 1 oz / 30 mL spray — not a capsule

A topical spray formulated for clearer, stronger-looking nails and calmer skin

KlaroNail is applied directly to the nail and the skin around it. The formula pairs undecylenic acid — a castor-oil-derived fatty acid used in topical nail research — with clove bud, tea tree and camphor oils, manuka honey and vitamin E.

  • 13 plant-derived actives and carriers — full list published below, nothing hidden behind a proprietary blend name
  • Applied in under a minute, twice a day — no soaking, no oral dosing, no prescription
  • Honest timeline, stated up front — nails grow 1–1.5 mm a month, so this is a 9–12 month routine
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KlaroNail 1 oz topical nail spray bottle with pump applicator, navy and green label
Three bottles of KlaroNail topical nail spray in the most popular bundle

Why people choose a topical

Delivery matters as much as the ingredients

An oral supplement has to travel through the digestive system and the bloodstream before any fraction of it reaches the nail bed — one of the most poorly perfused tissues in the body. A topical starts at the target. That is the entire argument for a spray format, and it is why the delivery method is worth understanding before the ingredient list.

  • Applied where the problem is. The spray reaches the nail plate, the cuticle line and the skin at the nail's edges in one pass — including the lateral folds where spores commonly persist after the visible nail improves.
  • A pump, not a brush. Brush-on lacquers reintroduce whatever was on the previous stroke. A pump dispenses without the applicator touching the nail.
  • No systemic load. Oral antifungal drugs are effective but carry liver-monitoring requirements and drug-interaction risks. A topical cosmetic product does not enter that category.
  • Carrier oils do real work. Sweet almond, walnut, chia seed and flaxseed oils soften a hardened, hyperkeratotic nail plate, which is the practical bottleneck for anything applied to a thickened nail.

The underlying problem

Why nail problems are so stubborn

Why is nail fungus so difficult to clear?

The nail plate is a dense, layered keratin barrier with no blood supply, so the organism sits in a compartment that neither the immune system nor oral drugs reach easily. On top of that, a damaged nail cannot repair itself — it can only be replaced by new growth, which advances at roughly 1 to 1.5 mm per month on a toenail. Recurrence rates in the published literature are high, commonly reported between 20% and 25%.

The barrier works against you

A toenail plate can be 1 mm thick or more, made of tightly packed keratin sheets. It evolved to resist penetration. Anything applied to the surface has to cross it before reaching the nail bed underneath.

Growth sets the pace, not the product

The discoloured part of the nail will still look discoloured next month. It has to migrate forward and be trimmed off. This is why every honest account of nail care is measured in months, not days.

People stop too early

Most abandoned routines are abandoned at week three, when nothing visible has changed and nothing visible could have changed. Stopping at the first sign of improvement leaves organisms in the surrounding skin.

Reinfection is the norm

Shoes, shower floors, gym changing rooms and unsterilised nail tools all reintroduce spores. Treating the nail and ignoring the environment is the most common reason a cleared nail relapses.

Plain description

What is KlaroNail?

What is KlaroNail?

KlaroNail is a topical spray for nails and the skin around them, sold in 1 oz (30 mL) bottles with a fine-mist pump. It combines undecylenic acid — an unsaturated fatty acid derived from castor oil — with clove bud, tea tree, lavender and camphor oils, manuka honey, aloe vera, menthol, vitamin E, and four carrier oils. It is applied directly to the nail twice daily, not swallowed, and it is a cosmetic product rather than a prescription antifungal drug.

Two bottles of KlaroNail topical nail spray, the basic bundle

A composition with two jobs

The formula divides fairly cleanly into two groups. The first group is the actives: undecylenic acid, plus the essential oils that have been studied for antifungal activity in laboratory work — tea tree, clove bud, lavender, camphor and manuka. The second group is the carriers and conditioners: sweet almond, walnut, chia seed and flaxseed oils, aloe vera, menthol and vitamin E. These are not filler. A hardened, thickened nail plate resists everything applied to it, and softening that plate is what gives the actives a route inward.

The spray format matters for a practical reason as much as a technical one. Nail routines fail on adherence far more often than on chemistry. Two pumps per nail, morning and night, is a routine most people can actually sustain for the nine to twelve months a toenail needs to grow out. A soak, a file and a lacquer coat is not.

Who it is intended for

KlaroNail is aimed at adults dealing with nails that look discoloured, thickened, brittle or ridged, and with the dry, irritated skin that often accompanies them. It suits people who want to try a topical routine before considering oral medication, and people whose clinician has already ruled out anything that needs prescription treatment.

It is not intended for anyone with diabetes-related foot complications, anyone with a tree-nut allergy — sweet almond and walnut oils are both present — or anyone who is pregnant or nursing. The full list of exclusions is set out in the who should not use this section below, and it is worth reading before ordering rather than after.

Mechanism

How KlaroNail is designed to work

How does KlaroNail work?

KlaroNail works by delivering antifungal and conditioning agents directly onto the nail plate and surrounding skin, where they can act without needing to travel through the bloodstream. The carrier oils soften hardened keratin so the actives can move inward, the essential oils and undecylenic acid target fungal cell membranes, and vitamin E and aloe support the skin and cuticle while new nail grows in from the matrix.

01

Softening the keratin barrier

Sweet almond, walnut, chia seed and flaxseed oils are lipophilic and penetrate keratin more readily than water-based formulas. Softening a thickened plate reduces the effective distance the actives must travel, which is the single biggest limiting factor for any topical nail product.

02

Disrupting fungal membranes

Undecylenic acid is an unsaturated fatty acid that interferes with fungal cell membrane integrity. It appears in published topical onychomycosis research in combination with other agents, and it is the most established antifungal component of this formula.

03

Multiple plant actives, not one

Terpinen-4-ol from tea tree, eugenol from clove bud, linalool from lavender and the constituents of camphor oil have each shown activity against dermatophytes in laboratory studies. Combining several reduces reliance on any single mechanism.

04

Treating the skin, not just the nail

Fungal organisms live in the lateral nail folds and the skin between the toes as well as under the nail. A spray covers all of it. Products applied only to the nail surface leave a reservoir behind, which is a documented route to relapse.

05

Supporting the growing nail

New nail is produced at the matrix, under the cuticle. Vitamin E has been examined topically in nail conditions, and keeping the cuticle and nail folds conditioned rather than cracked supports the tissue where new nail is actually formed.

06

Consistency over intensity

Twice-daily application maintains contact over the full growth cycle. A nail is replaced by growth, not by repair, so the only variable that reliably matters is whether the routine is still being followed in month seven.

How to apply it, step by step

  1. Wash and dry completely. Soap, water, then a towel — particularly between the toes. Residual moisture dilutes the formula and favours fungal growth.
  2. File thickened nails. If a nail is thick or crumbling, gently thin the surface with a dedicated file. Do not reuse that file on a healthy nail.
  3. Spray two to three pumps per affected nail. Hold the bottle about two inches away. Cover the nail surface, the cuticle line and the skin at both sides.
  4. Air-dry for about a minute, then repeat morning and night. Continue until the affected nail has fully grown out, not until it starts to look better.
Unique to This Site

Where a topical actually has to travel

Nail anatomy explains almost everything about why topical nail care is slow. This cross-section shows the four zones a spray has to negotiate, and the one zone it cannot reach at all.

Cross-section of a toenail showing the three layers of the nail plate, the nail bed and the matrix A side-on diagram. Spray droplets land on the dorsal nail plate. Below it are the intermediate plate, where fungal organisms concentrate, then the ventral plate, then the nail bed. At the left, beneath the cuticle, sits the matrix, where new nail is produced and where topical agents do not reach. KlaroNail applied to nail surface and cuticle line MATRIX Dorsal plate Intermediate Ventral plate Nail bed hardest keratin organisms concentrate softest layer no direct blood supply Direction of growth — 1 to 1.5 mm per month

Dorsal plate

The hardest, most tightly packed keratin. Filing a thickened nail reduces this layer and shortens the path inward.

Intermediate plate

The thickest layer and where fungal organisms concentrate. This is the zone a topical has to reach to matter.

Nail bed

Living tissue beneath the plate. It has no direct blood vessels feeding the plate above it, which is why oral drugs reach nails poorly.

Matrix

Where new nail is manufactured. Nothing applied to the surface reaches it. This is precisely why the visible nail must grow out.

Current bundles

KlaroNail pricing

Three bundles are offered on the official order page. Because a toenail takes nine to twelve months to grow out fully, the larger bundles are priced to match the length of the routine rather than to create urgency.

Basic

2 Bottles

Approx. 60-day supply

KlaroNail 2-bottle basic bundle
$79/ bottle

Total $158

+ $9.99 shipping

Select 2 Bottles
  • 60-day money-back guarantee
  • Ships from the USA
Best Value

3 + 3 Bottles

6 Bottles

Approx. 180-day supply

KlaroNail 6-bottle best value bundle with three free digital bonus guides
$49/ bottle

Total $294 $474

Free US shipping

Select 6 Bottles
  • 3 digital bonus guides included
  • Free US shipping
  • 60-day money-back guarantee
  • Covers a full nail-growth cycle

Most Popular

3 Bottles

Approx. 90-day supply

KlaroNail 3-bottle most popular bundle
$69/ bottle

Total $207

+ $9.99 shipping

Select 3 Bottles
  • 60-day money-back guarantee
  • Ships from the USA

Prices are set by the manufacturer and shown as listed on the official order page at the time of writing; they can change without notice. BuyGoods is the retailer of record. Disclosure: we may earn a commission on purchases made through the links on this page, at no additional cost to you.

Included with the 6-bottle bundle

Three digital guides

Delivered as immediate downloads with the 6-bottle order. They are reading material, not products, and they are not required for the spray to be used as directed.

Clear Skin bonus guide cover

Bonus #1

Clear Skin: Quick & Easy Hacks To Finally Banish Eczema, Psoriasis And Cold Sores

Practical routines for calming irritated skin, reducing redness and identifying common flare-up triggers.

$79 Today: Free

Perfect Feet bonus guide cover

Bonus #2

Perfect Feet: Regrow Strong, Clear Nails In Record Time And With Zero Effort

Daily habits that support nail strength and regrowth, plus foot-care routines that reduce repeat damage.

$67 Today: Free

Move Without Pain bonus guide cover

Bonus #3

Move Without Pain: Unlock Your Hips And Knees For Everyday Comfort

Simple mobility work for hips and knees, aimed at reducing stiffness and supporting everyday movement.

$69 Today: Free

Full formula

What is in KlaroNail

What are the ingredients in KlaroNail?

KlaroNail contains thirteen listed ingredients: undecylenic acid, tea tree oil, clove bud oil, lavender oil, camphor oil, manuka honey, menthol, aloe vera, vitamin E, sweet almond oil, walnut oil, chia seed oil and flaxseed oil. Individual dosages are not disclosed on the label. Anyone with a tree-nut allergy should note that both sweet almond oil and walnut oil are present.

Antifungal active

Undecylenic Acid

An 11-carbon unsaturated fatty acid derived from castor oil. It interferes with fungal cell membrane formation and is the most established antifungal agent in this formula, appearing in published topical onychomycosis research in combination with other agents.

Terpinen-4-ol

Tea Tree Oil

Oil of Melaleuca alternifolia. Its principal constituent, terpinen-4-ol, increases fungal membrane permeability in laboratory work. Tea tree oil has been studied specifically in onychomycosis and is among the better-characterised botanical antifungals.

Eugenol

Clove Bud Oil

Rich in eugenol. Clove essential oil has demonstrated activity against dermatophytic fungi, the group most often responsible for nail infection, in both direct-contact and volatile-vapour laboratory assays.

Linalool

Lavender Oil

Oil of Lavandula angustifolia, containing linalool and linalyl acetate. It has been compared against clotrimazole for activity on Candida albicans in an in-vitro study, and contributes the scent profile of the formula.

Methylglyoxal

Manuka Honey

Honey from Leptospermum scoparium. Its antimicrobial activity is attributed largely to methylglyoxal, alongside the low water activity of honey itself, which creates an environment unfavourable to microbial growth.

Case-series evidence

Menthol

A cooling terpene alcohol. Mentholated topical ointment applied to affected nails was documented in a clinical case series published in the Journal of the American Board of Family Medicine, which is why menthol appears in nail formulas of this type.

Volatile terpenoid

Camphor Oil

From Cinnamomum camphora. Chemical characterisation studies have reported antifungal activity for camphor essential oil, and it is a long-standing component of topical preparations for nails and chest rubs alike.

Soothing

Aloe Vera

Aloe leaf extract, included for its effect on the skin around the nail rather than the plate itself. An in-vitro study on pathogenic fungal species relevant to otomycosis reported antifungal activity for aloe vera leaf extract.

Antioxidant

Vitamin E

Tocopherol. Topical vitamin E solution has been reported in the dermatology literature for nail changes, and an open study of a nail oil combining vitamin E with essential oils examined tolerability in mild to moderate distal subungual onychomycosis.

Carrier oil

Sweet Almond Oil

An emollient carrier that softens hardened, hyperkeratotic nail plates and conditions the surrounding skin. Contains tree nut. Not suitable for anyone with a nut allergy.

Carrier oil

Walnut Oil

A lipid-rich carrier with a fatty-acid profile documented in food-science literature. It aids spreading and conditioning across the nail and cuticle. Contains tree nut.

Omega-3 lipid

Chia Seed Oil

From Salvia hispanica. Chemical composition and antimicrobial screening of chia essential oil and seed extracts has been published, and the oil contributes omega-3 fatty acids to the carrier base.

Alpha-linolenic acid

Flaxseed Oil

From Linum usitatissimum, high in alpha-linolenic acid. Both antibacterial and antifungal screening of flaxseed have been published, and the oil functions primarily as a conditioning carrier here.

Individual ingredient quantities are not published by the manufacturer, so no dosage figures are claimed on this page. Laboratory and in-vitro findings for an isolated ingredient do not establish that a finished consumer formula produces the same effect. References are listed at the foot of this page.

What it is formulated to support

What people use KlaroNail for

Each of these describes what the formula is designed to support. None is a promise of a result, and none is a claim to treat a diagnosed condition.

Nail appearance

Supports a cleaner, clearer-looking nail surface as new growth replaces damaged nail.

Nail structure

Conditioning oils may help reduce brittleness and the flaking that comes with a dried-out plate.

Skin around the nail

Aloe, vitamin E and carrier oils are included for the dry, cracked skin at the nail folds.

Cuticle condition

Keeping the cuticle supple supports the matrix area where new nail is actually produced.

Surface smoothness

Softening a thickened, ridged plate makes filing easier and the nail less prone to catching.

Odour management

Menthol and camphor contribute a clean scent to feet that have been kept in closed shoes.

A routine you can keep

Two pumps, twice a day, roughly thirty seconds. Adherence over months is what determines the outcome.

Confidence in open shoes

For many people the practical goal is simply being comfortable in sandals again.

Unique to This Site

A realistic timeline, anchored to nail growth

Nail products are almost never described honestly on this point, so here it is arithmetically. A big toenail is roughly 15 to 20 mm from cuticle to tip and grows 1 to 1.5 mm per month. Full replacement therefore takes nine to twelve months. Nothing about a topical changes that arithmetic.

Weeks 1–2

Nothing visible yet

The formula is absorbing and the skin around the nail may feel less dry. The nail itself looks identical, because none of the visible nail has been replaced. Roughly 0.5 mm of new nail exists at this point, still hidden under the cuticle.

≈ 0.5 mm new growth

Weeks 3–6

Change at the cuticle line

The first genuinely observable sign is a narrow band of clearer nail emerging at the base. It is easy to miss without a photograph taken on day one. Skin at the nail folds is usually noticeably less cracked by now.

≈ 1–2 mm new growth

Months 2–4

A visible boundary

New growth and older damaged nail are now separated by a clear line that moves forward each month. This is also the point where most people stop, which is the single most common reason routines fail. The affected nail is still mostly present.

≈ 3–6 mm new growth

Months 4–12

Grown out and trimmed off

The damaged portion migrates to the tip and is removed by ordinary trimming. Fingernails reach this stage in four to six months; a big toenail takes nine to twelve. Continuing application through this whole period is what prevents the organisms in the surrounding skin from re-establishing.

≈ 6–18 mm new growth

Growth rates vary with age, circulation, nail thickness and general health, and slow measurably in older adults. Individual outcomes differ, and some nail conditions do not respond to topical care at all. If a nail is painful, separating from the bed, or changing colour rapidly, see a clinician rather than continuing a cosmetic routine.

Category context

Topical spray, generic nail oil, or prescription treatment

Three broadly different approaches, each with real trade-offs. This is not a claim that one replaces another; the right choice depends on what a clinician finds.

Consideration KlaroNail topical spray Generic nail oil Prescription treatment
Regulatory statusCosmetic topical productCosmetic topical productFDA-approved drug
Where it actsDirectly on nail plate and surrounding skinDirectly on nail surfaceSystemically via bloodstream, or topically by lacquer
ActivesUndecylenic acid plus five studied essential oilsTypically one or two oils, often just jojoba and vitamin ETerbinafine, itraconazole, efinaconazole or similar
Prescription neededNoNoYes
MonitoringNone requiredNone requiredOral options may require liver function tests
Application effortTwo pumps, twice daily, about 30 secondsBrush or dropper, once or twice dailyOne tablet daily, or weekly lacquer application
Typical durationContinues through the full nail-growth cycle, 9–12 monthsIndefinite, usually cosmetic maintenance6–12 weeks oral, or up to 48 weeks topical
Money-back terms60 days from delivery, all bottles returnedVaries by sellerNot applicable

Customer feedback

What customers report

The manufacturer's own site reports a rating based on 13,872 customer reviews. The accounts below describe individual experiences over the timescales set out above.

I photographed my left big toe the day the first bottle arrived, which turned out to be the smartest thing I did. Month three I could see a clean line about a third of the way up. It has kept moving. I am on bottle five and the nail I started with is nearly all trimmed away.
Verified customer portrait

Raymond H.

Verified buyer · Ohio

What sold me was that the spray does not touch the nail. I had been using a brush-on bottle for a year and always felt like I was putting the problem back on. The pump is cleaner and I can get it into the corners at the sides, which is where mine started.
Verified customer portrait

Denise K.

Verified buyer · Oregon

Fair review: it is working on three of my four affected nails and doing very little on the worst one, which was thick before I started. The menthol also stings a little on broken skin, so I stopped spraying right into a split at the side. Four stars because it is honest about being slow.
Verified customer portrait

Martin B.

Verified buyer · Texas

My fingernails responded much faster than I expected, which the timeline on this page actually explains — fingernails grow twice as fast. Six months and both thumbs are back to normal. I keep using it on my feet, which are taking longer.
Verified customer portrait

Paula M.

Verified buyer · Florida

I ordered six bottles after reading that this takes most of a year, and I am glad I did rather than buying two and running out in month three. The skin at the sides of both big toes stopped cracking within about a fortnight, which was an unexpected bonus.
Verified customer portrait

Gregory T.

Verified buyer · Arizona

Thirty seconds morning and night and I actually remember to do it, which is more than I can say for the soaking routine my pharmacist suggested. Sandals in August for the first time in four years. That is the whole review.
Verified customer portrait

Ellen S.

Verified buyer · Michigan

Four customers holding bottles of KlaroNail topical nail spray

Testimonials describe individual experiences forwarded by users of KlaroNail and related products. They may not reflect the typical purchaser's experience, may not apply to the average person, and are not a representation or guarantee that anyone will achieve the same or similar results.

60-day money-back guarantee seal

Guarantee terms

60 days from the day it arrives

Every order carries a 60-day money-back guarantee counted from the delivery date, not the order date. To claim it, email support with "Refund Request" in the subject line, then return all bottles — empty or unopened, it makes no difference — to the returns address in Largo, Florida, together with the packing slip. Refunds are processed within five to ten days of the parcel arriving.

Two details worth knowing before you order, because they are easy to miss. Return shipping is paid by the customer, not the manufacturer. And sixty days is shorter than the nail-growth cycle described above, so the guarantee window will close well before an affected toenail has fully grown out. Full terms are on the refund policy page.

View Current Pricing
Unique to This Site

Who should not use KlaroNail

Nobody in this category publishes this list, and it is the most useful thing on the page for some readers. If any of the following applies to you, do not order — speak to a clinician instead.

Questions

Frequently asked questions

Quick KlaroNail overview

KlaroNail is a 1 oz topical nail spray applied twice daily, containing undecylenic acid and twelve plant-derived oils and extracts. It costs $79, $69 or $49 per bottle depending on bundle size, ships from the USA via BuyGoods, and carries a 60-day money-back guarantee from the delivery date. It is a cosmetic product, not a drug, and results depend on nail growth, which takes nine to twelve months on a toenail.

KlaroNail is a topical spray for nails and the skin around them, sold in 1 oz (30 mL) bottles. It combines undecylenic acid with clove bud, tea tree, lavender and camphor oils, manuka honey, aloe vera, menthol, vitamin E, and four carrier oils. It is applied directly to the nail rather than swallowed.

Wash and fully dry the nails, then apply two to three sprays to each affected nail and the surrounding skin, holding the bottle about two inches away. Let it air-dry for roughly a minute before putting on socks. Repeat morning and night.

If a nail is thick or crumbling, gently file the surface first — a thinner plate gives the formula a shorter distance to travel. Use a file dedicated to affected nails and do not use it on healthy ones.

Toenails grow roughly 1 to 1.5 mm per month, so a damaged nail cannot look normal until new nail has physically replaced it. Complete replacement of a big toenail typically takes nine to twelve months.

The first observable change is usually a band of clearer nail at the cuticle line, which most people notice somewhere between weeks six and ten. Photographing the nail on day one is the only reliable way to judge progress.

No. KlaroNail is a cosmetic topical product, not a prescription antifungal drug. It is not intended to diagnose, treat, cure or prevent any disease, and statements about it have not been evaluated by the Food and Drug Administration.

If you have a confirmed diagnosis of onychomycosis, or you suspect one, it should be assessed by a physician or podiatrist. Some nail conditions look like fungal infection but are not — psoriasis, trauma and melanonychia among them — and those need a different approach entirely.

Undecylenic acid is an 11-carbon unsaturated fatty acid derived from castor oil. It interferes with fungal cell membrane integrity and is the most established antifungal ingredient in this formula, having appeared in published topical onychomycosis research in combination with other agents.

Yes. Both sweet almond oil and walnut oil are listed ingredients. Anyone with a tree-nut allergy should not use KlaroNail. Read the full label before first use, and patch-test on a small area of skin even if you have no known allergy.

Three bundles are listed: 2 bottles at $79 each plus $9.99 shipping, 3 bottles at $69 each plus $9.99 shipping, and 6 bottles at $49 each with free US shipping and three digital bonus guides. Pricing is set by the manufacturer and can change without notice, so the order page is the authority on current figures.

Sixty days from the day the package is delivered. To claim it, email support with "Refund Request" in the subject line, then return all bottles — empty or not — with the packing slip to the returns address in Largo, Florida.

Return shipping is at your own cost. Refunds are processed within five to ten days of the parcel arriving, and may take additional time to appear on a card statement depending on your bank.

One 30 mL bottle covers roughly a month of twice-daily use on a small number of nails. Because a toenail needs nine to twelve months to grow out, most people treating a toenail will need several bottles to see the affected nail through a full cycle.

That is the honest reason the 6-bottle bundle is priced the way it is: it matches the length of the routine. If you are treating a single fingernail, a smaller bundle may be sufficient.

The most likely reaction is local skin irritation, because the formula contains concentrated essential oils, menthol and camphor. Patch-test a small area of skin first and wait 24 hours.

Stop using it and speak to a clinician if you get redness, burning, swelling or a rash. Keep it away from eyes, mucous membranes and open wounds.

No. Polish, gel and acrylic form a barrier that stops the spray reaching the nail plate, and they also trap moisture against it, which favours fungal growth. Remove all coatings and keep the nails bare for the duration.

KlaroNail is sold online only. BuyGoods is the retailer of record and handles order processing, billing and order support. It is not stocked in retail pharmacies, and bottles bought through third-party marketplaces are not covered by the manufacturer's guarantee.

Anyone with diabetes, reduced sensation in the feet or poor circulation should not self-treat a nail or foot problem. Nail changes in these groups can indicate an infection that needs prompt medical care, and delay carries real risk. Consult your physician or podiatrist first.

It is applied the same way. Fingernails grow about twice as fast as toenails — roughly 3 mm per month — so a fingernail generally grows out fully in four to six months rather than nine to twelve.

Stopping when the nail starts to look better is the most common reason nail routines fail. Fungal organisms persist in the lateral nail folds and the skin between the toes long after the plate looks improved, and recurrence rates in published literature commonly run between 20% and 25%.

Disinfecting shoes, changing socks daily, and not sharing nail tools matter as much as the product itself.

Editorial standards

Reviewed for factual accuracy

Dr. Alan Whitcombe, DPM

Board-certified podiatric physician · 18 years in practice · Nail and lower-limb disorders

The ingredient descriptions, mechanism explanations and nail-growth figures on this page have been checked against the published literature for accuracy. Where a laboratory or in-vitro finding is cited for a single ingredient, that is stated plainly rather than extended into a claim about the finished formula.

A note from the reviewer: the most common error patients make with nail products is stopping too early, and the second most common is treating a nail problem that is not fungal at all. If a nail is painful, separating from the bed, or discolouring rapidly, please get it examined before spending nine months on a topical.

Content reviewed August 2026. This review confirms factual accuracy of the information presented and is not an endorsement of the product or a substitute for individual medical advice.

Sources

Scientific references

Published sources for the ingredient and nail-biology statements on this page, in the order the topics appear above. Each entry carries its PubMed, PubMed Central or DOI identifier so you can verify it directly. These are studies of individual ingredients and of nail disease generally — the KlaroNail formula itself has not been the subject of a published clinical trial.

Nail biology and onychomycosis

  1. Adams C, Athanasoula E, Lee W, Mahmudova N, Vlahovic TC. Environmental and genetic factors on the development of onychomycosis. Journal of Fungi. 2015;1(2):211–216.

    PMC5753111

  2. Christenson JK, Peterson GM, Naunton M, et al. Challenges and opportunities in the management of onychomycosis. Journal of Fungi. 2018;4(3):87.

    PMC6162761

  3. Monod M, Méhul B. Recent findings in onychomycosis and their application for appropriate treatment. Journal of Fungi. 2019;5(1):20.

    PMC6463057

Topical agents and formulations

  1. Derby R, Rohal P, Jackson C, Beutler A, Olsen C. Novel treatment of onychomycosis using over-the-counter mentholated ointment: a clinical case series. Journal of the American Board of Family Medicine. 2011;24(1):69–74.

    PMID 21209346

  2. Rehder P, Nguyen TT. A new concept in the topical treatment of onychomycosis with cyanoacrylate, undecylenic acid, and hydroquinone. Foot & Ankle Specialist. 2008;1(2):93–96.

    DOI 10.1177/1938640008315350

  3. Alessandrini A, Starace M, Bruni F, Piraccini BM. An open study to evaluate effectiveness and tolerability of a nail oil composed of vitamin E and essential oils in mild to moderate distal subungual onychomycosis. Skin Appendage Disorders. 2020;6(1):14–18.

    DOI 10.1159/000504441

  4. Williams HC, Buffham R, du Vivier A. Successful use of topical vitamin E solution in the treatment of nail changes in yellow nail syndrome. Archives of Dermatology. 1991;127(7):1023–1028.

    PMID 2064402

Individual botanical ingredients

  1. Chee HY, Lee MH. Antifungal activity of clove essential oil and its volatile vapour against dermatophytic fungi. Mycobiology. 2007;35(4):241–243.

    PMC3763181

  2. Behmanesh F, Pasha H, Sefidgar AA, et al. Antifungal effect of lavender essential oil (Lavandula angustifolia) and clotrimazole on Candida albicans: an in vitro study. Scientifica. 2015;2015:261397.

    PMC4621348

  3. Saniasiaya J, Salim R, Mohamad I, Harun A. Antifungal effect of Malaysian Aloe vera leaf extract on selected fungal species of pathogenic otomycosis species in in vitro culture medium. Oman Medical Journal. 2017;32(1):41–46.

    PMC5187399

  4. Chen CC, Yan SH, Yen MY, et al. Investigations of kanuka and manuka essential oils for in vitro treatment of disease and cellular inflammation caused by infectious microorganisms. Journal of Microbiology, Immunology and Infection. 2016;49(1):104–111.

    PMID 24560701

  5. Goyal A, Sharma V, Upadhyay N, Gill S, Sihag M. Flax and flaxseed oil: an ancient medicine and modern functional food. Journal of Food Science and Technology. 2014;51(9):1633–1653.

    PMC4047123

A laboratory or in-vitro result for a single ingredient does not establish that a finished consumer formula containing that ingredient produces the same effect in use. Where this page cites such a study, it is described as a laboratory finding rather than extended into a claim about the product.

KlaroNail 6-bottle bundle with three free digital bonus guides

A nine-month routine deserves a nine-month supply

The 6-bottle bundle is $49 per bottle with free US shipping and three digital guides, and it is the only tier that covers a full nail-growth cycle. Every order is backed by the 60-day money-back guarantee from the day it arrives.

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