Treat the fungus behind it
25% undecylenic acid treats most athlete’s foot on the skin, including affected areas between the toes.
Itchy, burning feet?
Give the cause your attention.
Help calm the symptoms you feel
Relief for the itching, burning and scaling that can make your feet hard to ignore.
Know what you’re treating
Athlete’s foot affects the skin. An infection inside or underneath the nail needs a different treatment.
25% undecylenic acidAthlete’s foot relief
Antifungal Pen
Tired of the itch between your toes and the burn inside your shoes? Treat most athlete’s foot with 25% undecylenic acid—and help relieve the itching, burning and scaling that come with it.
- Treats most athlete’s foot
- Relieves itching & burning
- Helps relieve scaling & irritation
- Brush directly onto affected skin
For athlete’s foot on the skin, including affected skin between the toes. For external use only. Does not treat infection inside or underneath the toenail.
About the antifungal pen+
Athlete’s foot shouldn’t run your day.
The itch between your toes. The burning inside your shoes. The flaky skin you would rather keep covered. Nutralab brings targeted treatment to the skin that needs it, helping you work toward more comfortable feet.
With 25% undecylenic acid, the Antifungal Pen treats most athlete’s foot and helps relieve its associated itching, burning, scaling and irritation.
- Treats most athlete’s foot on the skin
- Helps relieve itching, burning and scaling
- Precision brush for direct application, including between the toes
- Available in 1-, 3- and 6-pen packs
Make treatment part of your routine
Clean the affected area, dry thoroughly and brush on a thin layer as directed on the label. Follow the full treatment course, even if discomfort eases earlier.
For external skin use only. Does not treat infection inside or underneath the toenail. Avoid the eyes. Stop use if irritation occurs and consult a healthcare professional if there is no improvement within 4 weeks or as directed on your label. Ask a healthcare professional before self-treating a foot problem if you have diabetes or poor circulation.
Active ingredient & botanicals+
Active: Undecylenic acid 25%.
Key supporting ingredients: Tea tree oil, oregano oil, manuka oil, clove bud oil, propolis extract, and vitamin E.
Read the product label for the complete ingredient list and warnings.
How to use+
Wash the affected skin and dry thoroughly, especially between your toes. Brush a thin layer onto affected skin, following the frequency and full treatment period on your product label. Avoid contact with the eyes. Stop use if irritation occurs; consult a healthcare professional if there is no improvement within 4 weeks or as directed on your label.
Shipping & returns+
Shipping options and charges appear at checkout. Review our shipping and return policies for processing, delivery, and eligibility details.
Shipping policyReturn policyYour athlete’s foot treatment routine starts here.
Clean, dry skin. Targeted application. Consistent treatment as directed.
Know the concern
Itchy, scaly skin between the toes can be athlete’s foot. If you’re unsure what’s causing it, ask a pharmacist or healthcare professional.
Wash. Dry thoroughly.
Clean the affected skin and dry it carefully, including between the toes, before applying treatment.
Brush onto affected skin
Apply a thin layer using the brush. Follow your product label for how often to apply it.
Follow the full course
Keep going for the full labeled treatment period. Stop if irritation occurs, and seek advice if the condition is not improving.
Athlete’s foot treatment.
With a clear purpose.
Treat the cause of the itch
Undecylenic acid 25%
An antifungal active for athlete’s foot.
Athlete’s foot is a fungal skin infection. Undecylenic acid works against the fungus and helps relieve its associated itching, burning and scaling. Nutralab contains 25% undecylenic acid in a formula you brush onto affected skin. Use as directed.
25%Antifungal active
Skin between the toes
Targeted brush application
Know what goes on your skin
One formula. A clear role for each part.
Undecylenic acid is the antifungal active. The formula also contains tea tree, oregano, manuka and clove bud oils, propolis and vitamin E as supporting ingredients. Read the full label before use so you know what you’re applying.
Check the complete label before use, especially if you have known sensitivities to botanical oils or bee-derived ingredients.
Less distraction. More everyday comfort.
Your feet deserve care that’s focused on what’s getting in your way.
When my feet itch, it’s hard to think about anything else. What I want is straightforward care I can make part of my routine, so my day isn’t built around the discomfort.
I want to sit down after a busy day and actually relax. Taking care of the itchy skin on my feet is something I’d like to stop putting off.
I’m looking for care that focuses on the affected skin. Being able to see where I’m applying it, and follow a clear routine, matters to me.
It’s the little things I miss—wearing my usual shoes and getting on with my plans. That’s the comfort I want my foot-care routine to work toward.
Dry, flaky skin can make me feel self-conscious. I want to give my feet consistent care instead of covering them up and hoping the problem goes away.
I’m looking for a simple way to care for irritated skin, with instructions I can understand. I want to know what the product is for and how to use it.
I’d like to feel more comfortable looking after my feet. A focused routine feels more manageable to me than adding several different steps.
I want to stop ignoring those uncomfortable patches of skin. For me, the first step is finding the right care for the concern I actually have.
I want to enjoy a walk, time in the garden, or an afternoon out without my feet always being on my mind. Everyday comfort is the reason I’m looking for care.
My goal is to feel more at ease in my usual routine. I want foot care that’s clear enough to follow consistently, even on a busy day.
I want to feel comfortable in the shoes I choose and confident getting on with my plans. Those ordinary moments matter more to me than a complicated routine.
Being able to focus on family, hobbies, and the day ahead is what I’m working toward. I want my foot-care routine to fit into that life.
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Know what to expect before you start
Your athlete’s foot questions, answered.
Straight answers about treatment, symptoms and getting your routine right.
Contact our teamWill this help with athlete’s foot?+
Nutralab contains 25% undecylenic acid to treat most athlete’s foot and help relieve its associated itching, burning, scaling and irritation. Apply only to the skin and areas listed on your product label, and follow the directions through the full course.
Will it treat fungus inside my toenails?+
No. The pen treats fungal infection on the skin. It does not treat infection inside or underneath the toenail. Thickened, discolored or brittle nails may need a different treatment; a healthcare professional can help identify the problem.
How do I use it for athlete’s foot?+
Wash the affected skin and dry it thoroughly, especially between the toes. Brush on a thin layer as directed on your product label. Follow the label for application frequency and the full treatment period. For external use only; avoid contact with the eyes.
How soon should I expect a difference?+
Treatment takes time, and response varies. Follow the complete course on your label, even if symptoms ease earlier. Stop use if irritation develops. If there is no improvement within 4 weeks, or your label advises sooner, consult a healthcare professional.
What is the active ingredient?+
The active ingredient is undecylenic acid 25%. The formula also contains tea tree, oregano, manuka and clove bud oils, propolis extract and vitamin E. Read your product label for the complete ingredient list and warnings.
Can I use it if I have diabetes or poor circulation?+
Speak with your healthcare professional before treating a foot concern yourself if you have diabetes, poor circulation, reduced sensation or an open wound. Get medical advice for a very painful, hot, swollen or spreading foot problem.
What if my skin is sensitive?+
Check the complete ingredient list before use, especially if you react to botanical oils or bee-derived ingredients such as propolis. Follow the label’s warnings. Stop use if the product irritates your skin.
Should I choose 1, 3 or 6 pens?+
Choose the quantity that suits your needs. The larger packs lower the price per pen compared with buying single pens separately. Pack size does not guarantee a treatment duration or a faster result.
Will my order repeat automatically?+
The pen page offers a subscription by default when available, with a One Time Purchase option beneath Add to Cart. A subscription repeats according to the selected plan until cancelled. Check the displayed price and renewal terms before ordering. Choose One Time Purchase for one order without recurring charges.
Where can I check shipping and returns?+
Available shipping options and charges appear at checkout. Our shipping and return policies explain delivery information, return eligibility and how to get help with an order.
Can athlete’s foot come back?+
Yes, athlete’s foot can recur. Alongside treatment, dry carefully between your toes, wear fresh socks, let shoes dry between wears, and avoid sharing towels or footwear. These habits support foot hygiene; the pen is not a promise against future infections.
Treats most athlete’s foot
Relieves itching & burning
Helps relieve scaling & irritation
An antifungal active. A targeted way to apply it.
| Feature | Antifungal Pen |
 Non-medicated oils |
|---|---|---|
| 25% undecylenic acid | ||
| Antifungal active + botanicals | ||
| Built-in precision brush | ||
| Twist-to-dispense applicator | ||
| No DIY oil blending | ||
| Athlete’s foot treatment directions |
Your next step toward comfortable feet
Ready to do something about athlete’s foot?
Choose your pen pack and start targeted treatment for the itching, burning and scaling that keep getting in your way. Use as directed.
Shop Athlete’s Foot Relief