Packaging says this brush-on product helps stop brittle nails from breaking, peeling and chipping so that nails can grow. Directions say to apply over clean nails, cuticles and under nail tips and to massage until completely absorbed. It does moisturize (water is the first ingredient) and thus strengthen my dry nails. I've used it on my fingernails and toenails, and if used twice a day as recommended, my nails don't look dry and seem stronger.
As with all Nutra Nail products, it doesn't contain formaldehyde, toluene, or DBP.