A new study has found evidence of microplastics in the part of the brain responsible for smell.
Microplastics have been found in other parts of the body such as the bloodstream, other organs and even in the placenta.
These tiny particles are everywhere, but scientists are still not quite sure what it means in terms of human health threats.
Scientists in Brazil have found more evidence of microplastics infiltrating the human body.
While it has been previously reported that microplastics were found in human brain tissue, this recent study discovered these tiny particles in the olfactory bulbs of the brain which are responsible for processing smells.
Microplastics from clothes and packaging
Fifteen human cadavers were observed in the study and of those 15, eight had evidence of microplastics in their brain tissue, researchers said.
The most common types of microplastics that were found came from common items such as clothing and packaging materials.
This recent evidence further confirms the nose is an "important entry site for environmental air pollutants," researchers said.