Nail polish has been around for a long time, but new formulas and techniques have taken nail painting to the next level. Or perhaps you read news about banned nail polish ingredients and have concerns. But gel polishes with TPO are still widely available in the U.S.Is nail polish bad for your nails, and what are the possible health effects? "Nail polish itself is not inherently bad for you," Dr. Nicole Weiler, a board-certified dermatologist at NYU Langone Health, tells TODAY.com. “I think everything is okay in moderation with nail polish,” Dr. Shari Lipner, a dermatologist at Weill Cornell Medical Center who researches nail conditions, tells TODAY.com.