Rated 4.7/5 (1379 reviews)

25% Undecylenic Acid: Targets and destroys fungal spores deep within the nail once the biofilm is broken down.
Manuka Oil: Breaks through the biofilm barrier at a molecular level, allowing treatment to penetrate effectively.
Tea Tree Oil: Weakens and dismantles the biofilm that protects fungus from conventional remedies.
Clove: Calms irritation around the nail and supports natural healing.
Propolis: Speeds up nail regeneration and helps restore healthy appearance after fungal damage.
Our breakthrough formula first breaks through the fungus’s protective shield using powerful natural botanicals. Then, 25% Undecylenic Acid gets to work—destroying stubborn spores at their core.
With our Precision Pen Applicator, the treatment reaches deep beneath and around your nail, targeting the fungus exactly where it hides
All orders are processed within 1–2 business days and shipped straight to your doorstep.
Delivery typically takes 7–10 business days after shipping.
Once dispatched, you’ll receive a tracking link to monitor your order’s journey.
Thank you for your patience as your package makes its way to you!
We stand by the effectiveness of the AntiFungal Pen with a 60-day money-back guarantee.
Use it for 60 days, and if you don’t notice visible improvement, contact us at contact@astria.com for a full refund—no questions asked.
✅ Zero risk. Total confidence. Proven results.
I spent months trying vinegar soaks and over-the-counter creams with zero results. This pen actually worked—my nails are finally clear and healthy
When I say this product is a life changer, I truly mean it. I’ve been struggling with toenail fungus for about 15 years—especially on my big toes. The nails were thick, rough, and embarrassing. I had to file them down constantly and even use special clippers. I never wore open-toe shoes or let anyone see my feet.
After using this product just four times, I’m amazed — only one nail is still a bit thick, but it’s already growing out healthy and normal. I honestly can’t remember the last time my toes looked this good! I even booked my first pedicure and can’t wait to finally wear sandals in public. Nothing else I’ve tried, not even prescriptions or ointments, ever worked like this. Truly the best product ever!
- Alexandria W.
See the stunning transformations our products deliver — real results from real customers.
Powered by nature and science, our formula combines 25% Undecylenic Acid to eliminate fungal spores, while Manuka and Tea Tree Oils dissolve the protective biofilm barrier. Clove soothes inflamed nail beds, and Propolis supports rapid nail repair and restoration for healthier, clearer nails.
Follow these simple steps to get started
Wipe your feet after washing and ensure it's fully dry
Twist the base of the pen, with the brush pointing downward, until the product dispenses onto the brush tip
Brush the pen downwards towards your skin
Leave the substance on your nails until it has been fully absorbed
Wipe your feet after washing and ensure it's fully dry
Twist the base of the pen, with the brush pointing downward, until the product dispenses onto the brush tip
Brush the pen downwards towards your skin
Leave the substance on your nails until it has been fully absorbed
Find answers to common questions about our products, shipping, returns, and more.
The majority of customers notice relief from symptoms such as itching and irritation within the first few weeks.
In fact, 94% of those who completed the full treatment protocol report seeing results within this timeline:
Results may vary from person to person.
Yes you can. The functionality works the same for both your toes and your finger nails.
We will process the order and ship out within 48 hours of receiving the order.
Delivery will typically take between 7-10 days to be shipped to your door step.
We recommend applying on the affected areas twice a day. Once in the morning, once at night.
Most customers with sensitive skin report that the formula feels gentle and soothing, thanks to its botanical ingredients.
However, because it contains a potent 25% concentration of Undecylenic Acid—the active antifungal component—we recommend performing a test on a small area first, especially if you have known skin sensitivities.
We provide a 60-day money back guarantee for all our customers.
If you don't see any results after 60 days, simply write in to us at contact@astria.com for a refund.
We will process it for you immediately. No questions asked.