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Microplastics in Foods Intended for Health Purposes: From Dietary Supplements to Clinical Nutrition Products
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This review pulls together existing research showing that tiny plastic particles have been found in health products like supplements, infant formula, herbal remedies, and even hospital feeding formulas — the very products meant to support people who are sick, very young, or otherwise vulnerable. This matters because these populations may be more sensitive to contaminants and often depend on these products daily, yet scientists still don't fully understand the health risks, so more consistent testing and research is needed to figure out how concerned we should be.
Microplastics (MPs) are pervasive contaminants that have been detected throughout the food chain. Their presence raises concerns in foods intended for health-related purposes, as these products are often consumed by vulnerable populations such as infants, older adults, and patients requiring clinical nutrition support. These groups may be more susceptible to contaminant exposure and may rely heavily on specialized foods. Therefore, understanding the occurrence and potential risks of MPs in such products is important. This review summarizes the current state of knowledge regarding the presence, sources, and health implications of plastic particles in several categories of health-oriented foods, including dietary supplements, medicinal herbs, plant-based beverages, honey, infant formulas, and clinical nutrition products, including enteral and parenteral formulations. Microplastics have been reported across these matrices. Fibers and fragments dominate, and common polymers include polyamide, polyethylene, polypropylene, and poly(ethylene terephthalate). These particles can originate from polluted water, soil, and air, as well as from production processes, packaging wear, and clinical delivery systems. Current evidence suggests that improving methodological consistency and expanding targeted toxicological research relevant to vulnerable populations will be crucial for strengthening risk assessment.
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First occurrence and risk assessment of microplastics in enteral nutrition formulas
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For the first time, researchers tested enteral nutrition formulas (liquid nutrition given to hospital patients through a tube) and found an average of 45 microplastic particles per liter. Patients could be ingesting 24 to 76 microplastic particles per day depending on their formula intake, with some polymers carrying high hazard risk scores. This is particularly concerning because these products are given to people who are already in vulnerable health conditions.
Microplastic contamination in oral pharmaceuticals for pregnant women and children: A neglected direct exposure pathway
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Researchers found tiny plastic particles (microplastics) in common oral medicines and vitamins made for pregnant women and children, including capsules and pediatric vitamin drops. Some products, especially children's soft vitamin capsules, contained a wide mix of plastic types and dozens of particles per dose, while plain starch-based capsules had none detected. Since these medications are meant for the most vulnerable groups, this suggests drug manufacturing could be an overlooked source of microplastic exposure — and the study's authors argue drug makers should start testing for and limiting plastic contamination during production.
A Scoping Review of Microplastic Contamination in Infant Foods: Exposure Pathways and Implications for Nutrition and Health of Children
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Researchers reviewed 28 existing studies and found that tiny plastic particles called microplastics show up in baby formula, breast milk, feeding bottles, and even in babies' first bowel movements — meaning infants are exposed before birth and through their earliest meals. While scientists don't yet know exactly how this affects babies' health long-term, the widespread presence of these particles in infant nutrition is concerning enough that researchers are calling for more safety research and cautious steps to limit exposure in the meantime.
Marine Microplastics and Infant Health
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This review examines the accumulation of marine microplastics and their potential implications for infant health, a uniquely vulnerable population. The authors discuss exposure pathways including breast milk and formula and highlight the need for targeted research on developmental health effects given the limited body of evidence in young children and infants.
Micro problems with Macro Consequences: Accumulation of Persistent Organic Pollutants and Microplastics in Human Breast Milk and in Human Milk Substitutes
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This review examines the co-occurrence of persistent organic pollutants (POPs) and microplastics in human breast milk and infant formula, highlighting that infants — one of the most vulnerable populations — may be exposed to both chemical and particle-based contaminants through feeding. The authors stress that the health effects of microplastic ingestion in early life remain largely unknown, making this a critical gap in understanding long-term developmental risks.
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