A friend mentioned Nail Tek CITRA to me a few weeks ago when she saw my chipped nails. At the time, I was skeptical, but after using it for a week, I am a die-hard convert. My nails have stopped breaking and chipping so they grow longer and look healthier.

Choose from three levels of strengthening and conditioning: 1) for normal, healthy nails, 2) for soft, peeling nails, or 3) for dry, brittle nails. apply Nail Tek like you would a base coat.  Even better, Nail Tek CITRA (unlike its popular  cousin, Nailtiques) is formaldehyde-free made with natural aldehydes. So is it worth the $15? Let’s do the Fashion Math:

Although this special polish costs $15 a pop in your local drugstore ($13.50 if you buy online), the price is well worth the green. In fact, you could pay for each application with the loose change you find on the street. More importantly, you can wait longer between salon manicures (thus saving more cash) and your nails will stop chipping and cracking. Now isn’t that worth it?

To see more sales and deals, visit our Fashion Math archives to see what’s worth the splurge, and don’t forget to visit our buying guides and the best beauty products.