The potential negative health effects of micro- and nanoplastic pollution are attracting increasing attention among health professionals, policymakers, scientists, and consumers. Ubiquitous in modern environments, microplastics arise from food packaging, textiles, cosmetics, industrial materials, and other synthetic products. These persistent particles now pervade air, water, and soil, with lifespans of hundreds to thousands of years.
Microplastic particles have been detected across trophic levels, accumulating in plants, animals, and humans. In humans, exposure occurs primarily through ingestion (e.g, bottled water, seafood, salt, and processed food) and secondarily through inhalation. A recent review of human studies confirmed the presence of microplastics in eight of twelve major organ systems, as well as in breast milk, meconium, semen, sputum, urine, and stool.
Mounting evidence links microplastics to a growing array of pathological outcomes. In the digestive system, microplastics can induce intestinal barrier dysfunction and gut dysbiosis, potentially contributing to inflammatory bowel disease, food allergies, and cancer. Inhaled microplastic particles can accumulate in the lungs, promoting hypersensitivity, bronchiolitis, and other respiratory issues. The endocrine, reproductive, and neurological systems may also be negatively affected. Specifically, microplastic exposure is associated with decreased fertility, neurodegeneration, hormonal imbalance, cognitive impairment, and immune dysfunction
These effects stem from a combination of physical, chemical, and biological interactions. Microplastics possess a large surface-to-volume ratio and tend to be hydrophobic, allowing them to adsorb, concentrate, and transport environmental toxins such as heavy metals, endocrine disruptors, and persistent organic pollutants. Smaller particles can penetrate biological membranes and enter cells, thereby interfering with normal physiological functions. Microplastics have been shown to consistently trigger oxidative stress, lipid peroxidation, mitochondrial dysfunction, genotoxicity, inflammation, and endoplasmic reticulum stress.
Notably, these are precisely the pathophysiological disturbances that molecular hydrogen (H2) has been shown to attenuate. Over 1500 studies have been published to date on the biochemical effects and applications of molecular hydrogen in cellular, animal, and human models. Regardless of the condition under study, molecular hydrogen exhibits certain consistent biological effects, including selective ROS scavenging (both directly and indirectly), lipid peroxidation suppression, mitochondrial support, anti-inflammation, and endoplasmic reticulum stress reduction.
Several in vivo studies demonstrate the ability of molecular hydrogen to mitigate industrial toxin-induced cellular and organ damage via these pathways. For example, mice fed melamine-tainted feed and hydrogen-rich water were better able to excrete melamine in their urine than those fed tap water; hydrogen-rich water was able to suppress methylparaben-induced oxidative DNA damage in human dermal fibroblasts; and inhalation of hydrogen gas has been found to protect mice against neurotoxicity and cognitive impairment associated with trimethyltin exposure. In addition, hydrogen administration has shown promise in mitigating the damaging effects associated with exposure to particulate matter (e.g., PM2.5) and smog. Together, these studies suggest that molecular hydrogen is likely to mitigate similar damage arising from microplastic exposure. While these results are promising, no studies to date have directly examined whether molecular hydrogen can prevent or reverse the toxic effects of micro- or nanoplastics in any biological model.
Given the apparent ubiquity of microplastic pollution and the lack of scalable remediation strategies, molecular hydrogen therapy could offer a practical, biologically-plausible, and globally-accessible countermeasure. The toxic effects associated with microplastic exposure (e.g., oxidative stress, inflammation, mitochondrial dysfunction, etc.) are mediated through cellular pathways that molecular hydrogen has repeatedly been shown to modulate. With its favorable safety profile, ease of administration, and natural alignment with the body’s antioxidant and anti-inflammatory defenses, molecular hydrogen is uniquely positioned as an egalitarian therapeutic candidate. As microplastic research shifts from detection to intervention, molecular hydrogen deserves serious consideration as a mechanistically-targeted, low-risk strategy worthy of immediate scientific attention.
References
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