OPI Nail Envy Original Nail Strengthener -Ideal for weak, damaged nails. Supplies maximum strengthening with hydrolyzed wheat protein and calcium for tougher, longer, stronger, natural nails! Weak, damaged nails are not any match for OPI Nail Envy NAIL STRENGTHENER! Way to added calcium and protein, OPI Nail Envy NAIL TREATMENTS build nail cropping-able nails which can be tougher, longer and stronger than ever before. All Nail Envy products can be utilized as a stand-on my own remedy or as a base coat alternative.