Do you eat biryani from black plastic containers? A hidden health risk explained

When you order biryani or curry on Swiggy or Zomato, it often arrives in a sturdy, glossy black plastic container. It looks neat, premium and durable. Many of us even wash and reuse these boxes at home, assuming they are perfectly safe.

But according to nutritionist Dr Nandita Iyer, these black plastic containers may not be as harmless as they appear. A recent post she shared on X has sparked concern about what these boxes are really made of.

Made from e-waste
Media sources claim that many black plastic food containers are manufactured using recycled electronic waste. Old computers, televisions, keyboards and other electronic items are processed and turned into plastic products. The problem is that electronic components often contain flame retardants and other chemicals designed to prevent fires.

When such materials are recycled without strict safety standards, traces of these chemicals can remain in the plastic. These substances were never meant to come into contact with food.

How toxins enter your food
Studies suggest that black plastic made from recycled e-waste can contain higher levels of chemical residues compared to regular food-grade plastic. The risk increases when hot food is served in these containers.

Biryani, curries and other oily dishes can accelerate the leaching process. Heat and fat together make it easier for harmful compounds to migrate from the plastic into the food. Reheating food in the same container, especially in a microwave, further increases this risk. Even keeping hot food sealed in the container for long periods can allow more chemicals to seep in.

Possible health concerns
The effects may not be immediate, but repeated exposure over time can pose serious health risks. Certain chemicals used in electronics are known to interfere with hormone function, including thyroid activity. Long-term exposure has been linked to reproductive issues and developmental concerns in children. Some studies also warn of a potential increase in cancer risk with continuous contact.

What you can do

• If you order takeaway food, transfer it to steel or glass containers as soon as it arrives.
• Avoid reheating food in black plastic boxes, even if they are labelled microwave safe.
• When ordering, you can request restaurants to use aluminium foil containers or paper-based packaging without plastic lining.
• If feasible, carry your own stainless steel container when picking up food.

The black takeaway box may look convenient and stylish, but when it comes to health, safer storage choices make all the difference.