Early-life exposure to 50nm polystyrene nanoplastics at environmentally relevant concentrations (1 µg/L for 72 hours) triggered premature healthspan decline in C. elegans without affecting lifespan. The exposed organisms showed diminished locomotion and pharyngeal pumping—key markers of healthy aging—accompanied by global upregulation of circular RNAs from longevity-regulating genes. This represents a concerning paradigm shift in our understanding of environmental contamination's health impacts. Unlike traditional toxicology focused on acute lethality, this research reveals how ubiquitous plastic pollution may be subtly accelerating biological aging processes through epigenetic mechanisms. The circular RNA dysregulation mirrors patterns seen in natural aging, suggesting nanoplastics essentially hijack normal aging pathways. Given that humans are increasingly exposed to similar nanoplastic concentrations through food, water, and air, these findings raise profound questions about whether environmental plastic pollution is contributing to premature healthspan deterioration in human populations. The study's limitation is its restriction to nematodes, but the conservation of aging pathways across species makes these findings highly translatable. This work positions circular RNA monitoring as a potential early warning system for environmental aging acceleration.