Excellent 4.8 | 1,790 reviews

Eliminate fungal infections and prevent nail damage with swiss biolabs.

verified Targets stubborn nail fungus at the root

verified Promotes clear, healthy nail regrowth

verified Improves nail strength and color fast

verified Recommended by Dermatologists

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"For optimal, long-term results, we recommend a 6-month supply, as full toenail renewal can take 4–6 months, ensuring complete restoration and lasting protection against reinfection."

Maria H. Wener  - Medical Doctor (MD)

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Antifungal Nail Pen – Maximum Strength Therapy with 25% Undecylenic Acid

Antifungal Nail Pen – Maximum Strength Therapy with 25% Undecylenic Acid

$45.00
$45.00 $72.00
SAVE 37% Sold out
info WARNING: Low Stock Notice

This product sold out 12 times this year. We encourage you to take advantage of the limited sale and buy now.

PS: Only available here, don’t buy fakes on Amazon/eBay

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Swiss Biolabs Customer Transformations

  • “I was embarrassed to wear sandals because of my nails. This treatment made a huge difference — the discoloration faded, and my nails finally look normal again. I feel confident showing my feet now.”

    — James, USA

  • “I had yellow, brittle toenails that just wouldn’t clear up no matter what I tried. After using this for a few weeks, I can actually see new healthy nail growing in. It’s the first thing that really worked for me.”

    — Sophie, Switzerland

  • “I’d dealt with nail fungus for years and didn’t think anything would help. After consistent use, my nails are smooth, clear, and strong again. It honestly feels amazing to see that transformation.”

    — Laura, UK

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    OUR RETURN POLICY IS SIMPLE, HEALTHY NAILS WILL RETURN!*

    Heal Resistant Fungus Naturally—No Surgery, No Pills

    Prescription antifungal medications can be harsh on the liver, require constant monitoring, and still fail in over 50% of cases.

    Topical creams often can’t penetrate deep enough to reach the infection under the nail, leaving fungus to regrow stronger than before.

    This pen offers a smarter, more effective alternative. Its precision applicator delivers a high-potency antifungal formula directly to the nail bed — where fungus actually lives — targeting discoloration, brittleness, and thickened nails from the inside out.

    No prescriptions. No harsh chemicals. No side effects.

    Most users begin to see visible improvement within 4–6 weeks — clearer nail color, smoother texture, and stronger regrowth — with full restoration typically achieved after 3–6 months of consistent use, all from the comfort of home.

    Our customers tell it better than we do

    Excellent 4.8 / 5

    • "I truggled with ugly toenails for years"

      I tried everything... finally swiss biolabs delivered! Had to be patient but it definitely paid off.

      Henry B.

    • Podiatrists couldn't believe how fast my nails improved

      Don't waste time with other products or medication like I did... I've tried countless creams, polishes, and medications, but they only masked why this pen finally helped me get rid of the root cause.

      Emily W.

    • "No more hiding my feet"

      No more hiding my feet! I thought I'd be stuck hiding my feet forever. But finally wearing sandals again after years :)

      Anna L.

      Results demonstrated after 90 days

      In a third-party study, participants using the treatment daily showed the following results:

      94%

      noticed a visible reduction in nail discoloration

      89%

      experienced softer, smoother, and healthier-looking nails

      82%

      showed clear regrowth from the nail base

      76%

      reported no recurrence of fungus after consistent use

      No mess, easy to use

      Say goodbye to spills and complicated applications.

      • Precision tip for targeted application
      • No rubbing required - just apply and go
      • Quick-drying formula for mess-free use
      • Compact design for easy portability

      Targeted Formula With Clinically Supported Ingredients

      • Undecylenic Acid (25%)

        A clinically recognized antifungal agent that penetrates deep into the nail bed to eliminate fungus at the source and prevent future infections.

      • Tea Tree Oil

        A powerful natural antiseptic known to combat fungal and bacterial growth while soothing irritation and supporting healthy nail recovery.

      • Manuka Oil

        Sourced from New Zealand’s Manuka tree, this rare oil offers intense antimicrobial and anti-inflammatory properties that accelerate visible healing and renewal.

      • Clove Bud Oil

        Contains natural eugenol, a compound that helps disinfect the nail surface, calm inflammation, and restore comfort to irritated skin.

      • Propolis Extract

        A resin produced by bees, packed with antioxidants and antifungal compounds that shield nails from reinfection and promote rapid repair.

      • Tocopheryl Acetate (Vitamin E)

        A nourishing antioxidant that restores moisture, strengthens brittle nails, and supports smooth, healthy regrowth after fungal damage.

        Frequently Asked Questions

        How long until I see improvements in my skin?

        When used as directed on the skin around the nails, many customers report relief from symptoms like itching and irritation within the first few weeks. Individual experiences may vary.

        How much product do I get in each pen?

        One pen can be used to treat multiple affected areas of the skin, including the skin around multiple toes or fingers, depending on usage frequency.

        Can it prevent further fungal infections?

        Swiss Biolabs' formula is designed to treat common fungal skin infections like athlete's foot and ringworm. While it is not intended for prevention, maintaining proper hygiene and following usage directions can help support overall skin health.

        What’s the standard shipping time?

        Orders usually ship within 24-48 hours, and delivery typically takes 3–5 business days (domestic).

        What benefits can I expect?

        • Relief from itching, burning, and irritation caused by athlete's foot and ringworm
        • Support for skin comfort and hygeine around affected areas
        • Easy, targeted application for consistent use
        • Includes moisturizing botanicals to help maintain soft, smooth skin

        Is the pen chemical-free?

        We use a monograph-compliant antifungal active - 25% Undecylenic Acid - combined with skin-conditioning botanical oils. Our formula contains no parabens, artificial dyes, or synthetic fragrances.

        What benefits can I expect?

        We use a monograph-compliant antifungal active - 25% Undecylenic Acid - combined with skin-conditioning botanical oils. Our formula contains no parabens, artificial dyes, or synthetic fragrances.

        How often should I apply it?

        We recommend applying as directed on the label. Consistent use is important for full symptom relief and effective treatment of conditions like athlete's foot and ringworm.

        Is it suitable for use around nails?

        Yes. Our formula is intended for use on the skin around the nails and between the toes, as directed. It is not intended to treat fungal infections of the nail itself.

        Can I use the pen if I have a sensitive skin type?

        Many user with sensitive skin tolerate the formula well, as it includes soothing botanical ingredients. However, because the product contains a high concentration of Undecylenic Acid (an active antifungal drug),we recommend performing a patch test before full use - especially if you have known sensitivities.

        Is it suitable for men and women?

        Yes. Our antifungal formula is designed for adult use and may be used by both men and women to treat common fungal infections like athlete's foot, ringworm, and jock itch. As with any OTC drug, follow label directions and consult a healthcare provider if you have sensitive skin or underlying conditions.

        Can I integrate this into my existing foot-care regimen?

        Yes. Simply add the pen application after washing or soaking your feet. It complements most foot-care routines.

        What is the full ingredient list?

        Undecylenic Acid (25%), Tea Tree Oil, Oregano Oil, Manuka Oil, Clove Bud Oil, Propolis Extract, Tocopheryl Acetate (Vitamin E), plus other supporting ingredients for optimal penetration.

        What if I stop using the pen?

        For best results, it's important to use the product as directed for the full recommended treatment period - even if symptoms improve earlier. Stopping too soon may reduce the effectiveness of the treatment.

        Ready to treat common fungal skin infections like athlete's foot?

        Try out antifungal formula with 25% undecylenic acid - backed by a 90-day satisfaction guarantee. Take advantage and support your skin's comfort and hygiene starting today.

        If you don’t see results in 90 days, we’ll refund you

        Step 1: Document your progress

        Take a clear photo of your nails before starting treatment, then repeat every month.
        You’ll notice gradual improvements — less discoloration, smoother texture, and new healthy growth from the base.

        Step 2: Apply daily

        Use the pen twice a day, morning and night. Apply directly to the affected nail and surrounding skin.
        Consistency is crucial — skipping days can let the fungus return beneath the nail surface.

        Step 3: Stay consistent for 90 days

        Commit to at least 90 days of daily use for best results.
        Most users see visible improvement within 4–6 weeks, while full nail renewal typically takes 3–6 months, depending on nail growth speed.

        * When paired with consistent use.