Plastic ingress in food & drink

Grade the worry, not just the exposure. Microplastic health effects in humans are Emerging — the exposure is well-documented, the consequences much less so. The high-risk items below are worth changing because the swaps are trivial, not because any single one is known to harm you. How this sits against other exposures.

Heating — plastic activated by heat

10 items · 7 high

Microwaving, boiling or steaming food in or near plastic releases particles rapidly

High Microwave ready meals Thin PET/PP trays shed particles when microwaved

High Boil-in-bag rice Nylon or PE bags release millions of particles per litre

High Plastic-mesh tea bags Nylon/PET mesh releases billions of particles per steep

High Coffee pods (plastic) Hot water through PP capsule under pressure

High Instant noodle pots Polystyrene cups + hot water = significant leaching

Moderate Soup cartons (hot-fill) Polyethylene inner lining contacted by hot liquid

Moderate Frozen veg in steam bags Perforated PE bags microwaved from frozen

High Baby formula (PP bottles) PP bottles release up to 16M particles/litre when sterilised

Moderate Jar lids (plastic-lined) Plastisol seal contacts hot food during pasteurisation

High Laminated paper cups LDPE inner lining releases trillions of nanoparticles

Drinking — bottles, caps & cartons

10 items · 4 high

Opening, closing and squeezing creates friction-based shedding directly into liquid

High Bottled water (plastic) PET bottle + cap friction adds particles with every opening

High Soft drinks (plastic bottle) PET bottles, especially if reused or warm-stored

Moderate Milk (plastic bottle) HDPE bottle; cap thread abrasion on every pour

Moderate Orange juice carton Polyethylene lining; cap friction on opening

High Sports / energy drinks PET + polypropylene sports caps shed with squeeze

Low Beer (plastic-cap glass) Cap liner contacts beer; glass safer but cap is not

Low Wine (plastic stopper) Polyethylene or composite cork sheds on removal

Moderate Flavoured water (plastic) Same PET/cap mechanism as bottled water

Moderate Squash & cordial Flexible LDPE bottle body sheds on squeezing

High Infant feeding bottle PP/silicone; formula + heat = major exposure route

Storage & packaging — wrapping and sealing

18 items · 3 high

Cling film, plastic trays and sealed pouches all contact food directly during shelf life

High Pre-wrapped red meat Thin PET/LDPE stretch film tears and sheds on opening

High Deli meat (sliced) Layered plastic film; particles shed during unwrapping

Moderate Pre-packaged cheese Plastic film + modified atmosphere packaging

Moderate Bagged salad BOPP or PE bag; particles detected inside bags

Low Bagged bread LDPE bag; particles found in contact face of loaf

Moderate Yogurt pots (plastic) PP tub + foil seal; peeling foil creates friction

Moderate Cream / crème fraîche PP pot; fat content accelerates chemical leaching

Moderate Smoked salmon (pouch) Multilayer plastic pouch; fatty food = higher migration

Low Pre-packed fruit Rigid PET clam-shell or LDPE bag

Moderate Margarine / spread PP tub; fat content increases plasticiser leaching

Moderate Peanut butter (plastic jar) Flexible LDPE; phthalates migrate into fats

Moderate Ketchup (plastic bottle) Squeezable LDPE; phthalates + fatty/acidic content

Moderate Ready-to-eat meals (chilled) PP trays, plastic lids; long dwell time increases migration

Moderate Table salt (plastic bag) Salt itself accumulates MPs from marine/environmental sources

Low Sugar (plastic bag) MPs found at low levels in commercial white sugar

High Cooking oil (plastic bottle) PET bottle; oil is a potent plasticiser solvent

Moderate Canned fish (ring-pull) BPA/BPS epoxy lining contacts contents; omega-3 fats accelerate

Moderate Honey (plastic squeezy) MPs found in honey; LDPE bottle adds further contamination

Production — processing equipment contact

10 items · 5 high

Plastic conveyor belts, pipes, cutting surfaces and sieves shed particles during manufacture

High Ultra-processed foods More production steps = more plastic equipment contact time

High Processed meat products Sausages, burgers: plastic mincers, extruders, casings

Moderate White bread / rolls Plastic dough mixers, prooving trays, conveyors

Moderate Breakfast cereals Plastic conveyor belts and coating drums in factory

Low Beer / lager Plastic fermentation vessels and pipework

High Farmed seafood MPs in water ingested by fish; accumulate in flesh

High Shellfish (mussels/oysters) Filter feeders; highest marine microplastic accumulation

High Sea salt Harvested from seawater; highest observed MP concentration

Moderate Tap water (used in food) Water treatment pipes; plastic fittings throughout supply

Moderate Bottled sauces Long plastic-contact dwell time in factory and storage

Plastic type — highest-risk packaging codes

10 items · 5 high

Check the recycling number in the triangle on packaging — certain resins carry specific chemical risks

High Code 3 — PVC Phthalate plasticisers; found on cling film, some blister packs

High Code 6 — Polystyrene Styrene monomer leaches especially with hot or fatty food

High Code 7 — Other May include BPA polycarbonates; baby bottles, water coolers

Moderate Code 1 — PET Single-use; antimony catalyst leaches; never reuse or heat

Moderate Code 4 — LDPE Flexible films and squeezy bottles; phthalates possible

Low Code 5 — PP Generally safer but sheds MPs under heat or repeated washing

Low Code 2 — HDPE Relatively stable; still sheds particles mechanically

High Nylon (unlabelled) Used in mesh tea bags, baking bags; high-temp shedding

High Recycled plastic (rPET) Contamination from recycling stream increases particle load

Moderate BPA-lined cans Older stock; epoxy BPA lining contacts food directly