Does Natural Nail Polish really exist? A natural nail polish that is not harmful, but even healthy? Many Nail Polishes in the Past Have Contained: Toluene– Developmental/reproductive toxicity, Ecotoxicology, Allergies/immunotoxicity, Contamination concerns, Irritation (skin, eyes, or lungs), Organ system toxicity (non-reproductive), Persistence and bioaccumulation Formaldehyde– Cancer, Ecotoxicology, Allergies/immunotoxicity, Irritation (skin, eyes, or lungs), Organ system...