Evidence reading guide

Microplastics by Product Category: How to Compare Evidence

MicroPlastics Research Desk · Originally published July 27, 2026 · Reviewed October 6, 2026

Correction, October 6, 2026: We withdrew the previous category scan counts, app medians, per-serving particle ranges and exposure ranking because this page did not provide reproducible supporting records. The Dataset markup and dataset licence claim are also removed. This replacement is an evidence guide, not a public measurement dataset. We have not performed a new laboratory assay.

A useful comparison starts with the question a source actually answers. A bag's material, particles in an experimental extraction, a sampled beverage and a model interpretation are different endpoints. Combining them in one numeric league table hides those differences. This page helps you choose the relevant guide and keep missing information visible.

Start with the product question

These links lead to source questions and editorial guides. Inclusion is not a ranking of exposure or health. Some linked historical guides remain under review; read each page's correction and source scope.

Eight categories, their evidence questions and limits

Category: Drinking waterWater evidence guide
Question to ask: Which exact water samples, packaging and particle-size range were studied?
Interpretation limit: Selected samples do not establish every brand, lot or a universal bottle dose.

Category: Tea bags and loose teaReviewed tea materials and studies
Question to ask: What are this bag and seal made of, and how was the experimental sample prepared?
Interpretation limit: The disputed 2019 count is not a normal cup dose. Disclosed materials do not rank clinical safety.

Category: Coffee and podsReviewed coffee evidence
Question to ask: Did the study test brewed coffee, an extracted capsule, or a different hot-contact product?
Interpretation limit: Tea-bag and cup experiments cannot supply a K-Cup or machine-specific dose.

Category: Food storageVessel and closure comparison
Question to ask: Which vessel, lid, seal, food and heating conditions match the source?
Interpretation limit: A material name or recycling mark does not measure a meal or validate a percentage reduction.

Category: Cookware and utensilsProduct contact and source explorer
Question to ask: Is the cited finding about this coating or utensil under these use conditions?
Interpretation limit: Wear, coating chemistry and particles in a finished meal require separate evidence.

Category: Baby feeding equipmentPregnancy and baby reading hub
Question to ask: Do test preparation and the specific parts match the feeding equipment?
Interpretation limit: Preserve feeding and hygiene instructions. A materials comparison is not a clinical safety ranking.

Category: Cosmetics and ingredientsReviewed ingredient-name checker
Question to ask: What does the complete ingredient name identify, and what formulation details remain unknown?
Interpretation limit: An ingredient-name match cannot determine concentration, physical form or finished-product compliance.

Category: Household materialsMaterial and source explorer
Question to ask: Is this an ingestion, inhalation, wear or environmental-release question?
Interpretation limit: Different routes and analytical methods cannot be summed into a daily exposure total.

Eight categories, their evidence questions and limits
Category	Question to ask	Interpretation limit
Drinking waterWater evidence guide	Which exact water samples, packaging and particle-size range were studied?	Selected samples do not establish every brand, lot or a universal bottle dose.
Tea bags and loose teaReviewed tea materials and studies	What are this bag and seal made of, and how was the experimental sample prepared?	The disputed 2019 count is not a normal cup dose. Disclosed materials do not rank clinical safety.
Coffee and podsReviewed coffee evidence	Did the study test brewed coffee, an extracted capsule, or a different hot-contact product?	Tea-bag and cup experiments cannot supply a K-Cup or machine-specific dose.
Food storageVessel and closure comparison	Which vessel, lid, seal, food and heating conditions match the source?	A material name or recycling mark does not measure a meal or validate a percentage reduction.
Cookware and utensilsProduct contact and source explorer	Is the cited finding about this coating or utensil under these use conditions?	Wear, coating chemistry and particles in a finished meal require separate evidence.
Baby feeding equipmentPregnancy and baby reading hub	Do test preparation and the specific parts match the feeding equipment?	Preserve feeding and hygiene instructions. A materials comparison is not a clinical safety ranking.
Cosmetics and ingredientsReviewed ingredient-name checker	What does the complete ingredient name identify, and what formulation details remain unknown?	An ingredient-name match cannot determine concentration, physical form or finished-product compliance.
Household materialsMaterial and source explorer	Is this an ingestion, inhalation, wear or environmental-release question?	Different routes and analytical methods cannot be summed into a daily exposure total.

Before putting two numbers side by side

Match the endpoint. A count, polymer mass, migration test and model score cannot be treated as interchangeable units.
Match the sample. Identify brand, product, lot, market and preparation. A generic material statement is not testing of the finished product.
Match particle sizes and identification. Record detection limits and whether the method establishes polymer identity. A method that sees smaller particles can return a larger count.
Read preparation and controls. Extraction, drying, concentration and laboratory blanks affect interpretation. Keep those conditions attached to the result.
Keep uncertainty visible. Unknown release remains unknown. It does not become zero because a surface is metal or glass, or harmful because a component is plastic.

The FDA's food overview explains why measurement standardization and quality controls matter. For tea specifically, the 2026 systematic review also describes methodological variability. Neither provides a validated daily exposure ranking for this website's categories.

How to use app and product-model output

A readable product photo can record visible information and help formulate a research question. It cannot assay particles, identify every hidden component or validate a personal health score. Our methodology explains the editorial contact/evidence index and its assumptions. Treat a model output as an interpretation to check against exact documents.

A publishable aggregate would need documented collection dates, inclusion rules, denominators, deduplication, model version and uncertainty. No reproducible category export meeting those requirements is provided here. We will not restore numeric scan medians or a dataset designation without supporting records.

Choose the next source to read

Use the category table for a specific product question. If several routines matter to you, the eight-question web review orders relevant reading by your preferences and leaves skipped or unresolved topics visible.

Build a routine reading plan →