Why boiling food should not be covered with plastic or package hot food in plastic - The potential health threats, misconceptions and way to go

Covering boiling food with plastic, heating food in plastic, and packaging hot food in plastic: The potential health threats, the misconceptions, and the way to go



In recent times, concerns have been raised about the safety of covering boiling food with plastic, or heating food in plastic, and packaging hot food in plastic bags.

One common misconception is that all plastics are created equal and can withstand high temperatures.

However, chemicals from the plastic can leach into the food, posing a risk to human health.

Plastics have different melting points, ranging from around 110°C (230°F) for polyethylene (PE) to 160°C (320°F) for polypropylene (PP).

When using plastic bags for these purposes, consider the type of plastic used, the temperature of the food, and the duration of contact between food and plastic.

Some plastics, like PP and polyethylene terephthalate (PET), are generally considered safe for food contact below 100°C. Others, like polyvinyl chloride (PVC), may release chemicals when heated.




Debunking misconceptions:Not all plastics are safe for food contact, even if they are labeled "food-grade"
Heating food in plastic bags can cause chemical leaching, even if the plastic doesn't melt

Advice to manufacturers:

Clearly label your products with temperature guidelines, such as:"Safe up to 80°C (176°F)"
"Not for heating food above 50°C (122°F)"
"Food-grade, microwave-safe (up to 100°C/212°F)"

Public advisory:Avoid using grocery bags to package hot food, cover food while boiling, or heat food in plastic bags
Check labels for temperature guidelines
Opt for alternatives like paper bags, cloth wraps, glass, or stainless steel containers
Don't cover boiling food with plastic bags; use stainless steel or glass lids instead

Specific examples of safe plastics include:Polypropylene (PP)
Polyethylene terephthalate (PET)

Examples of plastics to avoid for hot food:Polyvinyl chloride (PVC)
Polystyrene (PS)

To identify food-grade plastics, look for:The "food-grade" label
The manufacturer's temperature guidelines
The type of plastic used (e.g., PP, PET)

Using alternative packaging materials like paper bags, cloth wraps, glass containers, or stainless steel containers can reduce potential health risks. These materials are generally safer and more durable than plastic bags.

By being mindful of the plastics you use and how you use them, you can reduce potential health risks. Make informed choices about food packaging and preparation.

Best practices for safer food handling:Use food-grade plastics
Avoid heating food in plastic bags
Choose alternative packaging
Follow manufacturer guidelines

The writers, Lawrence Sarpong, is a Medicinal Chemist (Organic Chemistry) and Hannah Dede Labi, is a Nurse Practitioner