The larger microplastic particles generally arenāt a huge concern from a biological standpointātheyāre too big to be absorbed, so most of them just pass through your digestive system and get excreted.
The real concern is with much smaller particles, especially at the micro- and nano-scale. These can potentially cross the gut lining, enter the bloodstream, and circulate to different organs. Thatās where the discussion about possible health effects comes in.
That said, itās important not to overstate the risk. Scientists have detected microplastics in places like blood and even placental tissue, but the concentrations are low, and we still donāt have clear evidence showing that typical exposure levels cause specific health problems in humans.
So the current understanding is:
Bigger particles: mostly harmless and pass through
Smaller particles: biologically active and worth studying
Actual health impact: still uncertain and under investigation
A legitimate concern, but the science isnāt settled yet.