What we are going to tell you today may be a concerning risk: a simple dinner could expose you to the same cancer-causing chemical found in tobacco smoke. However, the reality is more complex than that. We are going to explain to you two different situations that happened almost at the same time: first, a warning about black plastic utensils, and then, a study about the air we breathe when we cook with gas stoves. so, let’s get started.
Black spatula
Everything started with a study published in Chemosphere, which analyzed 203 black plastic products sold in the U.S. Among them were kitchen utensils, hair accessories, and children’s toys.
Researchers found out that about 85% of these products contained flame retardants, which are chemicals that are normally used in electronic devices to avoid fires. The thing is that when these devices are not properly recycled some of these chemicals can end up in new plastic products, like spoons or spatulas.
Some of the chemicals found, like the BDE-209, are related to possible risks like: cancer, hormone alterations, and development issues. This started worrying headlines and many people decided to throw their black plastic utensils away.
Calculus mistake
After the study went viral, the authors themselves recognized they made an important mathematical mistake: they miscalculated the “safe” daily exposure level for one of the flame retardants by about a factor of ten. This means that what seemed to be closer to the safety limit was actually way less. So, the estimated exposure when using a black spatula was less than one-tenth of the safety limit set by the United States Environmental Protection Agency.
As a result, independent toxicologists stated that a black plastic spoon in good condition is basically safe for everyday cooking. Some experts still prefer to follow the “precautionary principle,” meaning that if it’s easy to switch to wood, stainless steel, or silicone, why not do so?
Air in the kitchen
While many people are worried about spatulas, another study, published in the Journal of Hazardous Materials, analyzed something different and probably more important: the air we breathe when cooking with gas stoves.
Researchers studied benzene, a chemical also found in tobacco smoke and also known to be a human carcinogen. It easily evaporates into the air and can be inhaled. The World Health Organization states that there is no completely safe long-term exposure level for benzene.
Researchers collected real-world measurements from 87 homes and used an indoor air model developed by the National Institute of Standards and Technology called CONTAM. They simulated how benzene from gas and propane stoves spreads through 24 typical home layouts representing a large portion of U.S. housing.
What did they find?
The study estimated that about 6.3 million people live in houses with gas stoves that emit high levels of benzene. In small or poorly ventilated homes, heavy use of burners and ovens increased benzene levels above California’s eight-hour reference level. And importantly, benzene did not remain only in the kitchen. It could spread into living rooms and bedrooms and remain there for hours.
Short-term and long-term risk
The study found that symptoms like headaches or irritation were unlikely. The levels stayed below the threshold that typically causes immediate effects. However, the concern is long-term cancer risk.
Using standard risk assessment methods from the U.S. Environmental Protection Agency, the researchers found that lifetime cancer risk in these homes often exceeded the commonly used benchmark of concern (more than one in a million). For children, the modeled cancer risk was about 1.85 times higher than for adults in many medium- and high-use scenarios.
In the worst situations, the researchers estimated between 16 and 69 additional leukemia cases per year among those 6.3 million people if stoves are heavily used without ventilation.
What can we do?
Some simple actions are suggested:
- Always use a vent hood that exhausts air outdoors while cooking.
- Keep it running for a while after finishing.
- If the hood only recirculates air, open a window when possible.
- In small apartments, keep children out of closed kitchens during long cooking sessions.
- Consider electric or induction stoves when replacing appliances.
So…
This is not about being scared , it’s about awareness. So, understanding how materials, recycling systems, and energy choices affect indoor air can help you make informed decisions and avoid some risks.