This stuff is amazing. I had gel nails for about 3 years, and by the time I decided to get rid of them, my natural nails were in ROUGH SHAPE, to say the least. My mom bought me a bottle of Nail Envy by OPI
18 Tips to Prevent Nails from Breaking, Splitting, Peeling, Chipping
Cracked or split nails - Dry, brittle nails that frequently crack or split have been linked to thyroid disease. Cracking or splitting combined with a yellowish hue is more likely due to fungal infection.