Cling Film and Health Risks: What You Should Know
Cling film (plastic wrap) is widely used to cover and store food, but concerns about plastic chemicals migrating into food are worth understanding. The risk depends on the type of plastic, the food, temperature, and how the wrap is used. Properly manufactured food-contact materials are regulated for intended uses, but that doesn’t mean every plastic wrap should be used in every situation.
1. Don’t Assume All Cling Film Is the Same
Plastic wraps can be made from different materials, including polyethylene (PE) and PVC. Their additives and recommended uses can differ.
Check the packaging for instructions about food contact, temperatures, and whether the product is suitable for microwave or freezer use.
2. Heat Is an Important Consideration
Avoid using plastic wrap in an oven unless the manufacturer explicitly says it is designed for that purpose.
For microwaving, follow the product’s instructions carefully. If the wrap isn’t specifically labeled for microwave use, transfer the food to a microwave-safe container and cover it with an appropriate lid instead.
3. Keep Plastic Away From Very Hot Food When Possible
Even when a wrap is approved for food contact, unnecessary heating can increase the potential for substances from the packaging to migrate into food.
A simple precaution is to let very hot food cool somewhat before covering it, particularly when the wrap will touch the food directly.
4. Fatty Foods Deserve Extra Attention
Some substances can migrate more readily into fatty foods than into watery foods. That’s another reason to follow the manufacturer’s instructions regarding which foods the product is intended to contact.
Safer Alternatives
For routine food storage, consider:
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Glass containers with lids
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Stainless-steel food containers
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Silicone food-storage covers designed for food contact
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Reusable beeswax or plant-wax wraps for suitable foods
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Ceramic containers with appropriate lids
Glass is especially convenient for leftovers because it can generally be used for both refrigeration and reheating when the specific container is designed for those purposes.
What About “Plastic Causes Cancer” Claims?
It’s important not to overstate the evidence. The presence of a chemical in a plastic product doesn’t automatically mean that using the product as intended will cause cancer or another disease.
Risk depends on the substance, amount of exposure, route of exposure, and duration. Regulatory agencies evaluate food-contact materials based on expected exposure under specified conditions.
Bottom Line
You don’t necessarily need to eliminate cling film from your kitchen. Use food-grade products according to their labels, avoid unapproved heating, and consider glass or other reusable containers when convenient.
The biggest practical mistake is using a plastic wrap in a way the manufacturer never intended—particularly exposing it to high temperatures.
