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Purelieve® Antifungal Nail Pen — 25% Undecylenic Acid + Tea Tree
4 mL · ~30-day supply per pen · Clinical-strength topical formula
✓
Visibly Clearer Nails
Restored clarity, week after week
✓
Max-Strength Formula
25% undecylenic acid, the highest dose available
✓
Precision Brush Tip
Targeted application, no mess, no waste
$67 in recovery guides — free with every order today.
(3 items)
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90 Day Money Back Guarantee | FREE Shipping to USA
90-Day Nail Recovery Guarantee
Nails grow slow, so we give you the full 90 days. Don't see clearer new growth coming in at the base? Email us, keep the pen, get your money back.
Watch Out For Generic Antifungal Pens
Most "antifungal pens" online use 10–15% undecylenic acid
diluted with fillers. Purelieve is one of the only formulas
delivering the full 25% clinical concentration.
Look At How Others Are Loving Their Product!
Real Reviews From Real People
Four Ingredients. One Pen. One Result.
Each ingredient chosen for one specific role in clearing nail fungus from the source. No filler. No proprietary mystery. Just the clinical active dermatologists trust — finally formulated at maximum strength in a precision pen.
THE CLINICAL ACTIVE Source: Castor oil-derived fatty acid
If your nail treatment had a signature ingredient, this would
be it. Undecylenic acid has been the cornerstone of clinical
antifungal nail protocols for over four decades. It's the one
ingredient sophisticated readers of treatment labels recognize
as genuinely antifungal — not a generic "nail care" botanical.
At 25%, Purelieve delivers the maximum concentration available
without a prescription. Most drugstore antifungal pens contain
10–15%. The 25% concentration is what allows the formula to
actually penetrate the nail bed and reach the fungus where it
lives — instead of sitting on the surface where it can't work.
This is what makes the rest of the formula matter.
THE BOTANICAL SUPPORT Source: Melaleuca alternifolia leaf extract
Tea tree has been used for natural antifungal support for
generations, long before clinical research caught up. Modern
studies have documented its terpinen-4-ol content as the
compound that gives tea tree its antifungal action.
Purelieve uses tea tree to complement the undecylenic acid —
extending the active spectrum and supporting the surface
skin around the nail where fungal spores often spread first.
THE COMFORT LAYER Source: Plant-derived menthol crystals
Undecylenic acid is strong. Without something to soothe,
twice-daily application would feel harsh on the skin around
the nail.
Menthol cools the application site on contact and reduces
the mild stinging some users experience in the first week.
It's the reason Purelieve feels comfortable to use daily,
even on sensitive cuticles.
THE HYDRATION SUPPORT Source: Plant-derived glycerin
Treating fungus dries the nail bed out. Without rehydration,
the nail grows back brittle and prone to splitting — even after
the fungus clears.
Glycerin holds moisture in the nail bed during the treatment
window, so when your healthy nail grows back, it grows back
strong. This is what other antifungal treatments leave out —
and why their results often look worse than the original
problem.
The Science Behind Undecylenic Acid
We're not making medical claims. What we are doing is formulating against decades of well-documented research on topical antifungal therapy — and one truth most "natural nail care" brands won't put on a homepage.
Toenail fungus doesn't live on the surface of the nail. It lives underneath, in the nail bed, where most over-the-counter treatments simply can't reach. This is why mouthwash soaks, vinegar, and basic tea tree oil rarely deliver visible results — they never make contact with the actual fungal colony.
Undecylenic acid is one of the few topical antifungal compounds documented to penetrate the keratin layer of the nail and reach the bed beneath. At low concentrations (10–15%), penetration is limited and results are slow. At 25%, the concentration crosses the threshold where the formula actually delivers — which is why podiatrists have used 25% formulations in clinical practice for decades.
The challenge has always been making 25% concentration tolerable for daily use. Most strong formulas burn, sting, or dry out the skin so badly people quit using them. Purelieve solves this with the supporting layer — tea tree, menthol, glycerin — that makes twice-daily use sustainable for the 8–12 weeks results require.
How Purelieve Works
Most antifungal treatments stop at the surface. Purelieve runs the full sequence your nail actually needs to clear and stay clear.
Penetrate
The 25% undecylenic acid crosses the keratin barrier of the nail — reaching the fungal colony living in the nail bed where surface treatments never make contact. This is the step most OTC pens fail at.
Target
Once inside, the formula disrupts the fungal cell membrane — the mechanism that's made undecylenic acid the gold standard for topical antifungal treatment for over 40 years. Tea tree extends the action to the surface skin around the nail.
Protect
Menthol soothes the application site so daily use stays comfortable. Glycerin holds moisture in the nail bed so the nail doesn't grow back dry, brittle, or split.
Regrow
Healthy nail grows in from the base at roughly 1mm per month. As it grows, the damaged portion gets pushed forward and clipped away. Full clearing takes 3–6 months. Visible progress shows up much sooner.
Penetrate
The 25% undecylenic acid crosses the keratin barrier of the nail — reaching the fungal colony living in the nail bed where surface treatments never make contact. This is the step most OTC pens fail at.
Target
Once inside, the formula disrupts the fungal cell membrane — the mechanism that's made undecylenic acid the gold standard for topical antifungal treatment for over 40 years. Tea tree extends the action to the surface skin around the nail.
Protect
Menthol soothes the application site so daily use stays comfortable. Glycerin holds moisture in the nail bed so the nail doesn't grow back dry, brittle, or split.
Regrow
Healthy nail grows in from the base at roughly 1mm per month. As it grows, the damaged portion gets pushed forward and clipped away. Full clearing takes 3–6 months. Visible progress shows up much sooner.
The Difference You Can Trust
Maximum 25% Undecylenic Acid (No Diluted Formulas)
Most "antifungal pens" sold online contain 10–15% undecylenic acid — diluted to reduce cost and skin reactivity. Purelieve delivers the full 25% clinical concentration, the same strength used in podiatric protocols. This is the dose that actually penetrates the nail bed.
Four-Ingredient Formula (No Filler Blend)
Most antifungal products pad their ingredients with mystery "proprietary blends" and irrelevant botanicals. Purelieve contains only four — Undecylenic Acid, Tea Tree, Menthol, Glycerin — chosen because each plays a specific role in clearing fungus and protecting nail regrowth. Every drop is doing work.
Precision Brush-Tip Pen (No Greasy Creams)
Antifungal creams stain socks, sheets, and clothing. They're messy to apply, hard to dose, and waste product every time you open the tube. The Purelieve precision applicator paints the formula exactly where it needs to go in 10 seconds, dries in 30, and leaves no residue.
Formulated In USA, Lab-Tested For Purity
Our formula is developed in the United States by a team focused specifically on topical antifungal treatment. Every batch is third-party lab tested for purity and potency before shipping. No artificial dyes, no added fragrance, no parabens. Cruelty-free. Vegan. The kind of label that holds up to a sophisticated reader's audit.
Frequently Asked Questions
The honest answers — including the ones most antifungal brands won't give you.
Q: What exactly does Purelieve do?
+
A: Purelieve delivers 25% undecylenic acid — a clinical-strength
topical antifungal — directly to the nail bed where fungus
actually lives. The precision brush applies a thin layer across
the nail surface and into the cuticle in seconds. Used twice
daily over 8–12 weeks, the formula targets the fungal colony
while your healthy nail grows in from the base.
Q: How is this different from the antifungal cream I tried from the drugstore?
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A: Two things: concentration and delivery. Most drugstore
antifungal creams contain 10–15% active ingredient — not strong
enough to penetrate the nail. Creams also sit on the surface
of the nail and never reach the fungus underneath. Purelieve
uses 25% undecylenic acid (the maximum OTC concentration) in
a brush-tip pen that paints the formula thin enough to absorb
through the nail.
Q: How long until I see results?
+
A: Visible clearing typically begins around week 3–6 — you'll
see a clearer "stripe" of new nail emerging from the cuticle.
Full clearing takes 3–6 months because that's how long it
takes for your healthy nail to grow out completely. The
formula works faster than the timeline suggests; nail regrowth
just has its own pace.
Q: How do I use it?
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A: Wash and fully dry your feet. Twist the bottom of the pen
until the liquid soaks the brush tip. Paint a thin layer
directly onto each affected nail, the surrounding skin, and
between toes. Let dry 30 seconds. Apply morning and night.
That's it.
Q: Will it irritate my skin?
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A: Undecylenic acid at 25% is strong, but Purelieve includes
menthol and glycerin specifically to make daily use
comfortable. Most users experience zero irritation. A small
percentage notice mild cooling or tingling in the first week,
which subsides. If you have very sensitive skin, do a patch
test on a small area 24 hours before full use.
Q: Can I use it on fingernails too?
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A: Yes. The formula works on any nail — toenails or
fingernails. The brush-tip applicator was designed to work
on both. Many customers use it on fingernails damaged by
years of gel or acrylic application.
Q: What's actually in it? Why these four ingredients?
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A: Undecylenic Acid 25% (the clinical antifungal active,
castor oil-derived). Tea Tree extract (botanical antifungal
support). Menthol (soothes the application site). Glycerin
(keeps the nail bed hydrated during treatment). Plus
purified water and a small amount of alcohol as a carrier.
No artificial dyes, no fragrance, no parabens. That's the
full formula.
Q: Where is it formulated? Is it tested?
+
A: Formulated in the USA. Every batch is third-party lab
tested for purity and potency before shipping. Lab reports
available on request via support@purelieve.com.
Q: What if it doesn't work for me?
+
A: We back every order with a 90-day money-back guarantee.
If you've used Purelieve daily for 90 days and don't see
visible improvement, email us. We'll refund your full order,
no questions. (And no, you don't have to return the pen — keep using it.)
Q: Can I use it long-term?
+
A: Yes. Purelieve is formulated for the full 3–6 month
treatment window most nail fungus cases require. After
clearing, some users continue applying once a week as a
preventive — especially if they're prone to recurrence
(athletes, swimmers, post-pedicure exposure).
What Our Customers Are saying...
First time in 4 years I'm not hiding my feet.
My big toenail had been yellow and thick since 2020. Tried
every cream and soak from CVS, nothing worked. Found this
through a friend, 8 weeks in and I'm seeing actual clear
nail growing in from the base. Wore sandals to my daughter's
graduation last weekend. First time. Cannot believe this
worked.
Podiatrist couldn't do better.
I'm a nurse, on my feet 12 hours, fungus on three toes from
years of work shoes. Saw a podiatrist who quoted me $400 for
laser treatment. Tried this first because what did I have to
lose. Six weeks in: visible clear bands at the cuticle on all
three nails. Save your money, try this first.
Bought for my husband, ended up using it myself.
My husband had toenail fungus for over a decade and refused
to deal with it. Bought him this. Two months later his nails
are looking normal for the first time since we got married.
I started using it on my fingernails after gel polish wrecked
them — also working. Buying a third pen for my dad.
Works, but takes patience.
Wish I'd known going in that "results in weeks" actually
means "you'll see something at week 6, full clearing at
month 5." That's not the product's fault, that's how nails
grow. Four stars because the marketing makes it sound
faster than it is. But yes — it works. New nail growing in
clear. Going to finish the protocol.
The 90-Day Nail Recovery Guarantee
Nail fungus doesn't clear in a week. New nail grows in at 1mm per month — that's how biology works. We built the guarantee to match how the product actually works. Use Purelieve twice daily for 90 days. If you don't see clearer growth at the cuticle, visible improvement in nail color, or the start of a real recovery — email us. We'll refund your full order. No questions. No need to return the pen. Because if it doesn't work, you shouldn't pay. And if it does — you'll already know.
CLAIM NOW
90-Day Money-Back Guarantee
Free US Shipping
Secure checkout
The 90-Day Nail Recovery Guarantee
Nail fungus doesn't clear in a week. New nail grows in at 1mm per month — that's how biology works. We built the guarantee to match how the product actually works. Use Purelieve twice daily for 90 days. If you don't see clearer growth at the cuticle, visible improvement in nail color, or the start of a real recovery — email us. We'll refund your full order. No questions. No need to return the pen. Because if it doesn't work, you shouldn't pay. And if it does — you'll already know.
CLAIM NOW
90-Day Money-Back Guarantee
Free US Shipping
Secure checkout