The study combines data from 52 other studies, 33 of which specifically looked at the consumption of microplastics through food and beverages.
Plastic pollution is so widespread in the environment that you may be ingesting five grams a week, the equivalent of eating a credit card, a study commissioned by the environmental charity WWF International said on Wednesday.
It found that based on "conservative assumptions" people are consuming about 2000 tiny pieces of plastic each week.
"It is very clear that the issue of microplastics is a global one. If we don't want plastic in our bodies, we need to stop the millions of tonnes of plastic that continue leaking into nature every year".
Of the 2000 pieces of microplastic that the researchers calculated the average person consumes, they estimate that around 1769 of those pieces come from water, with 182 in shellfish, 11 in beer and 10 in salt. But there could be large regional variations.
Researchers found that water in the United States and Lebanon had on average 4.8 and 4.5 fibres per 500 millilitres respectively, compared to 1.9 fibres per 500 millilitres in both Europe and Indonesia.
A separate study this month found that Americans eat, drink and breathe between 74,000 and 121,000 microplastic particles each year, and those who exclusively drink bottled water rather than tap water can add up to 90,000 plastic particles to their yearly total. That is the last time I will say microplastics.
According to an article published in the International Journal of Environmental Research and Public Health, our understanding of the potential human health effects from exposure to microplastics 'constitutes major knowledge gaps'.
It collated the findings of 50 global research papers in an attempt to provide an accurate calculation of ingestion rates.
He said the next phase of their research will be to better understand the human health impact of ingesting plastics.
But if microplastics are shown to damage human health, it will be very hard to remove them from the environment.
According to the University of Newcastle, the amount of microplastics ingested by an individual still varies depending on a combination of parameters that include the characteristics of the microplastics, the person's age and size, geographical location and its demographics, nature of development as well as lifestyle options.
"If we're going to properly address the throwaway plastic pollution crisis, we need urgent action at government, business and consumer levels to tackle its root causes head on".
Globally, more than 330 million metric tons of plastic is produced each year, and global plastic production is expected to triple by 2050.