Studies have shown that improper use, prolonged use, and use by individuals with allergies can damage natural nails with traditional gel nail polish. The main reasons are the presence of irritating chemicals, improper application/removal techniques, and exposure to ultraviolet light. While the currently popular "European and American standard" formulations (free of HEMA, TPO, and TMPTA) aim to reduce allergic reactions and toxicity risks, they are not entirely risk-free.