For Nails That Are Solid as a Rock Deborah Lippmann, manicurist to the stars, started out as a songstress and, as a result, many of her nail products are named after major pop icons, and other pop culture songs and figures. Before adding a pop of color, try her Hard Rock Hydrating nail hardener and base coat. If applied daily, it will help weak nails grow naturally, because of the inclusion of Aucoumea Klaineana extract " a natural resin from west African trees " in the formula. Aucoumea also helps to strengthen nails, and prevents ridges for smoother, healthier nail growth. This nail hardener also contains protein-building biotin (a cell regenerator) for strengthening, and hydrolyzed soy protein for hydration, to keep your nails strong yet pliable. Make wimpy, thin nails both stronger and longer. 0.5 fl. oz. Aucoumea Klaineana extract helps weak nails grow, and also strengthens nails and prevents ridges. Protein-building biotin strengthens nails. Hydrolyzed soy protein hydrates nails. Especially Suited For: All skin types. Essential Elements: This nail hardener and base coat contains Aucoumea Klaineana extract for strengthening nails, preventing ridges, and helping weak nails grow. The protein-building biotin also strengthens nails, and hydrolyzed soy protein hydrates them. Free of: Toluene, formaldehyde, DBP, animal testing. For Best Effect: Apply a light, single coat, and add one coat on top of another daily for a week. Then remove and begin again. If you have just removed artificial nails of any kind, you may also use Hard Rock daily. Start with it as a base coat, add two coats of color, and finish with Hard Rock as a top coat, while re-growing nails. Then, after about three months, just use it once or twice each week to keep nails strong and beautiful.