Answers from the Index

Guides

27Guides

Plain answers to the questions polish wearers actually ask: allergies and ingredient labels, removal without damage, and how to handle the salon. Written by Polish Index™, cited to real sources, and linked straight to the polishes in the Index.

01Gel polish allergy: signs, what to do, and how to keep polishingItching, redness, or lifting nails after gel? Learn the signs of a gel polish allergy, what to do next, and how to keep wearing color safely.Updated August 3, 2026 02What HEMA is and what HEMA-free actually meansHEMA is the most common gel polish allergen. Here is what it does, why it causes reactions, and what a HEMA-free label really promises.Updated August 1, 2026 03TPO, explained: the EU ban and what it means for your polishThe EU banned TPO in gel polish in September 2025. What TPO is, why regulators acted, what it means in the US, and how to find TPO-free gel.Updated August 3, 2026 04Acrylate allergy: the family of ingredients behind most nail reactionsGel, acrylics, and dip all rely on acrylates, the ingredient family behind most nail product allergies. What they are, who reacts, and what to do.Updated August 1, 2026 05Pregnancy and polish: what actually mattersCan you paint your nails while pregnant? What the evidence says about polish, gel, and salon visits during pregnancy, minus the fear-mongering.Updated August 1, 2026 063-free to 21-free: what the "free" numbers really mean3-free, 10-free, 21-free, non-toxic, clean: what nail polish labels actually promise, what is marketing, and how to pick the level that fits you.Updated August 1, 2026 07Kids and polish: what's safe at what ageWater-based peel-off for littles, regular polish for big kids, and why most experts say gel can wait. A calm, age-by-age guide for parents.Updated August 3, 2026 08What Vegan Nail Polish Actually MeansVegan polish means no animal-derived ingredients, and that is all it means. What is actually in the bottle, how vegan differs from cruelty-free and clean, and who certifies it.Updated August 3, 2026 09Is gel polish actually bad for your nails?Is gel actually bad for your nails? Mostly no, with real caveats. What the science says about damage, UV lamps, and allergies, and how to wear gel safely.Updated August 6, 2026 10Breathable and halal nail polish, explainedWhat breathable nail polish actually is, what makes a polish halal, how water-permeable formulas relate to wudu, and how the certifications really work.Updated August 6, 2026 11Weak, peeling, brittle nails: what actually helpsWeak, peeling, brittle nails are usually about moisture, not vitamins. What actually helps, how strengtheners and hardeners work, and when to see a doctor.Updated August 6, 2026