The frequency with which nail strengthener should be used varies from product to product. This is because some, such as those made with formaldehyde, are stronger and if used in excess can end up damaging instead of improving the nails.
Already the simpler strengtheners, which are those made with natural fibers, can be applied every day or whenever the nails are enameled. In turn, strengtheners that have a stronger action have a variable frequency of use and one should check the manufacturer's recommendations not to use them incorrectly.