Fungal nails (medically: onychomycosis) are a fungal infection of the nail plate. They occur because dermatophytes break down the keratin in your nails. The result is a thick, brittle, yellow-brown nail. Treatment is possible, but it only works if the active ingredient actually reaches the fungus. This is exactly where most products fail.
Why does everyone keep applying products without result?
The nail is not skin. A nail plate is compact, rich in keratin, and barely permeable. The fungus is not on the nail, but in it: within the nail plate itself, and sometimes even deeper in the nail bed. Creams, oils, and standard nail polishes rarely penetrate deep enough to reach the infection.
What they do do: moisturize the nail, making it temporarily look a bit better. Less discolored, slightly less brittle. But the fungus continues to grow in the meantime.
The difference between looking better and being cured
This difference is systematically underestimated. If a nail looks slightly shinier after two weeks of application, that feels like progress. But cosmetic improvement is not a cure. As soon as you stop using the product, you quickly see that nothing has actually changed.
This also explains why so many products recommend "continuous" use. Not because the treatment needs to be completed, but because the nail immediately relapses without the product.
When does a treatment work?
Effective treatment of fungal nails requires three things:
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an effective antifungal substance in sufficient concentration
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penetration enhancers that actually open the nail plate
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daily, consistent application over several months
Without penetration enhancers, the agent remains on the surface. This is the case with most drugstore products: they are developed for skin fungus, not for the harder structure of a nail.
The role of the placebo effect
Research into over-the-counter fungal nail remedies shows that a significant portion of users report improvement, even with products containing few proven active ingredients. The daily ritual of treatment influences how we perceive the nail. Objectively, little changes.
This does not mean that treatment does not work. It means that the right remedy is crucial.
The Leuvine Fungal Nail Pen: treatment that penetrates the nail
The Leuvine Fungal Nail Pen was developed to solve the penetration problem. The formula contains penetration enhancers that temporarily open the nail plate, allowing the antifungal agent to reach the infection where it resides: inside the nail, not on the surface. Use is simple via the pen applicator. Results become visible as the healthy nail grows out.
Frequently asked questions about treating fungal nails
How long does it take to treat fungal nails?
A toenail grows about 1 to 1.5 mm per month. Treatment typically takes 6 to 12 months for a toenail to fully grow out and be healthy. The infection may be under control sooner, but you only see how healthy the nail truly is when it has fully grown out.
Do I need to see a doctor for fungal nails?
Not always. The NHG guideline states that fungal nails in otherwise healthy people do not necessarily need to be treated, unless there are complaints. A local treatment is a logical first step. Only if no improvement is visible after three months is a doctor's visit advisable.
Can I treat fungal nails preventively?
Yes. Dry feet after showering, breathable footwear, and avoiding bare feet on damp public floors significantly reduce the chance of infection.
