Dr. Bryan Markinson: “A Polish to Fight Nail Fungus”
Fungus that attacks nails is everywhere—on locker-room floors, in shared bathrooms and even in your own shoes if you've had it before. It is easy to catch and easy to re-catch even after it has been treated either by laser therapy, which can cost $1000, or a long course of oral medication. Undecylenic acid does kill the types of fungus that infect nails—but the uncertainty lies in whether the polish will penetrate the hard surface of the nail, says Bryan C. Markinson, DPM, Assistant Professor of Orthopedics and Pathology at Icahn School of Medicine at Mount Sinai. "It probably does have some benefit as a preventative," he says, adding that debridement, which thins the nail and opens its pores, may help the acid penetrate. If patients apply the product at home, some doctors recommend that they sand the top of the nail with a file beforehand. Learn More

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