Unveiling the presence of MNPs within the human body

Micro and nanoplastics (MNPs) have emerged as critical contaminants of both the environment and human health. The current work synthesizes data from several studies to elucidate MNP occurrence in blood, saliva, and urine. Findings highlight polypropylene (PP), polyethylene terephthalate (PET), and polystyrene (PS) as frequently identified polymers of varied sizes and morphologies, with potential for systemic distribution and partial excretion. However, the lack of standardized extraction protocols and analytical procedures for their analysis hinders cross-study comparisons, underscoring the urgent need for uniform methodologies. Further exploration of additional biological matrices such as stool, cerumen, breast milk, and meconium, remains imperative to develop a comprehensive understanding of MNP exposure and associated health risks.