Microplastics are turning up in tap water worldwide, and many people want them out. Here is what microplastics are, what science does and does not yet know about the health effects, and which filters genuinely reduce them.
The honest status
Widespread, with health effects still being studied. The science is evolving, so we avoid overstating risk — but reducing microplastics is reasonable, and filtration can qualify with a Letter of Medical Necessity where a provider supports it.
Microplastics are tiny plastic particles — from larger plastics breaking down, synthetic fibers, and manufacturing — now detected in oceans, soil, food, and drinking water. Sizes vary widely, from visible specks down to particles far smaller than a human hair.
This is an area of active research. Microplastics are widely present, and scientists are studying potential effects, but the health consequences of typical drinking-water exposure are not yet well established. We think the honest framing matters: reducing exposure is a reasonable precaution, not a proven medical necessity for most people. A provider decides whether your specific situation supports a Letter of Medical Necessity.
Pore size is the key spec — the smaller the rated micron level, the more it captures.
Microplastics enter water from degrading plastic waste, synthetic textile fibers, tire wear, and manufacturing, and have been detected in tap and bottled water worldwide. Reported concentrations vary widely between studies because measurement methods are still being standardized — there is, as yet, no federal drinking-water limit for microplastics, though some regulators (California among the first) have begun developing measurement requirements.
Major reviews to date conclude there is not yet enough evidence to say whether microplastics in drinking water harm health at the levels typically found, while emphasizing that research is ongoing and gaps remain. We think that warrants measured language: reducing exposure is a reasonable precaution, not an established medical necessity for most people. A provider decides whether your specific situation supports a Letter of Medical Necessity.
Removal comes down to how fine the filter is. A reverse osmosis membrane has openings far smaller than the smallest measured microplastics, making it highly effective at the drinking tap. Sub-micron mechanical filters capture larger particles; the lower the micron rating, the more they catch. Whole-house filtration with adequate stages reduces particles across the home, though independent certification specifically for microplastics is still emerging.
Reverse osmosis is the most effective at the drinking tap; whole-house adds coverage everywhere. Eligible via the TrueMed checkout.
See RO system → See whole-house filter →Because the health case is still emerging, be measured: a provider determines whether filtration is medically necessary for you. If it is, the usual process applies. Educational only, not medical advice.
Reverse osmosis is highly effective at the drinking tap, and fine sub-micron mechanical filtration captures larger particles. Pore size determines how much is removed.
The science is still developing. Microplastics are widespread, but the health effects of typical drinking-water exposure are not yet well established, so reducing them is a reasonable precaution rather than a proven necessity.
It can be, with a Letter of Medical Necessity, if a provider supports it for your situation. Given the evolving science, the determination is the provider's.
