The Ultimate Nail Strengthener Nail Optimizer is a natural solution for all types of problem nails. Nail Optimizer will grow healthy, strong nails when used regularly—guaranteed. It is toluene and DBP free. Nail Optimizer is a blend of six different types of calcium, keratin and protein creates a formula that will nourish and strengthen nails naturally, giving you optimum performance. When used as part of your normal nail care routine, Nail Optimizer’s protein and calcium enriched formula will end: * splitting nails * peeling * weak nails * dry, brittle nails * chipping nails