No Vitamin D all winter or continuously having your nails covered with nail polish can leave them looking, dull, brittle and even yellow!!! A quick, inexpensive and natural fix is Lemon! Simply cut a lemon in half, microwave or heat in the oven for 15 seconds then twist each finger around in the center of the fruit. Lemons natural acids have a gentle bleaching action, and its pulp will puff away stains. Enjoy!!