These minute particles can enter the human bloodstream. As a result, they accumulate in the water and have the potential to disrupt organism and ecosystem health. They are polymers with the ability to attach to another molecule in the body.
These are few examples which helps you to general knowledge about risk of microplastics:
Particles inhaled may irritate and harm the lungs.
while the makeup of plastic particles varies, some are known to include compounds that interact with the body's hormones.
It can enter the fetus through the placenta and be ingested by newborns through breast milk.
The use of plastic feeding bottles and teething toys increases children's exposure to microplastics.
one of the health risks connected to microplastics is that these minute polymeric fragments enter into the food chain and, through a process of biomagnification are accumulated into fishes and predators normally used for human consumption. So, microplastics can become a risk for human health.