Microplastics in the Body: 9 Things We Actually Know, and What You Can Do About It

In little more than a decade, microplastics have gone from a marine-pollution footnote to a confirmed presence inside human blood, lungs, brain tissue, and the placentas of unborn children. This article separates what the current evidence actually establishes from what has been exaggerated in viral reporting, beginning with a precise definition of microplastics and nanoplastics and a verified accounting of where they have been detected in the human body, drawing on peer-reviewed studies published in Nature Medicine, JAMA Network Open, and other major journals through 2024 and 2025. It then directly addresses and corrects the widely repeated “credit card a week” ingestion claim, tracing it to a 2019 WWF-commissioned report whose methodology has since been shown, in multiple peer-reviewed critiques, to overestimate actual human ingestion by several orders of magnitude. It examines the three documented routes of entry into the body — ingestion, inhalation, and dermal contact — and then turns carefully to the central and still-evolving question of health risk, centering on a March 2024 New England Journal of Medicine study linking microplastics in carotid artery plaque to a 4.5-fold higher risk of cardiovascular events, while being explicit about the limits of current causal evidence. It examines India's own documented microplastic picture, including 2022 and 2025 research finding the Ganga River more heavily contaminated than major rivers on other continents, and a 2024 Toxics Link study finding microplastics in every tested Indian salt and sugar brand. It then reviews the specific, evidence-backed interventions available to reduce personal exposure, honestly separates these from popular but unproven “detox” claims, and closes with a historically grounded look at the Sushruta Samhita's ancient, entirely synthetic-material-free system of water purification and storage — not as a claim of ancient prophecy, but as a genuinely relevant precedent for what the current evidence recommends.