Dysbiosis or lack of beneficial bacteria leads to nail fungus. Trenev Trio , Primal Defense and Nature's Biotic can solve this problem. The latter is an amino acid from which hair and nails are largely made. MSM is also reputed to help with nail growth. Biotin , a B vitamin, is also useful.
Several studies show an improvement in firmness, hardness and thickness with frail or brittle nails.
Six months of between 2.5 and 10 mg of Biotin daily often completely solved the problem. Nail fungus can best be eradicated with NonyX Nail Gel .