More or Less Do we eat a credit card's worth of microplastic each week?
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Aug 24, 2024 
Professor Jamie Woodward, a researcher from the University of Manchester, dives into the striking statistic claiming we consume 5.5 grams of microplastic weekly—akin to a credit card's weight. He unpacks the study's origins, revealing the vast range of ingestion estimates that span from 0.1 to 5.5 grams. Woodward critiques media sensationalism around these numbers, discusses the challenges of measuring microplastics accurately, and emphasizes the importance of particle size over mere quantity when assessing health risks.
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Professor Uses "Credit Card" Stat
- Jamie Woodward heard an eminent professor present the "credit card" statistic.
- A groan went through the room when the professor showed it.
Origin of the Claim
- The "credit card" statistic originated from a World Wildlife Fund-commissioned study.
- This study aimed to estimate microplastic ingestion, not calculate it precisely.
Media's Role in Distortion
- The Australian study presented a range of microplastic consumption (0.1g - 5.5g).
- Media outlets, seeking a dramatic narrative, emphasized the upper limit (5.5g), comparing it to a credit card's weight.