It also crosses the sub-niches that include alternative health, natural remedy, and skin tightening. Additionally, he would have to wear slippers for work, which could allow the smell to spread freely. No matter what treatment route you choose, it will take some time before you see the full benefits of fungal nail treatments. Fungus can affect anyone of any age, but most often affects those who are older. Both undecylenate Zinc and undecylenic acid have been approved by FDA to treat toenail-fungus. This is rare since most companies do no accept liability for any reason after they have sold the product. Laser therapy is more successful than other treatments. Conventional treatments are not effective because they don't address the resistance that your skin and nails create.