Plastic Chemicals in Our Bodies: Surprising Changes in Just 7 Days

How Do These Chemicals Get Into Our Bodies?

According to researchers, common sources include:

– food packaged in plastic
– canned foods
– plastic bottles and food-storage containers
– heating food in plastic containers
– some cosmetics and personal-care products
– household dust and air

More than 16,000 different chemicals are used in plastic production, so completely avoiding exposure is nearly impossible.

How Was the Experiment Set Up?

Out of all study participants, 60 took part in a separate 7-day experiment. They were divided into five groups of 12.

Group 1: Food with less contact with plastic
Participants focused on reducing how much their food came into contact with plastic.

Group 2: Food with less contact with plastic + plastic-free kitchen tools
Along with reducing food contact with plastic, participants avoided plastic kitchen tools and containers.

Group 3: Personal-care products only
This group changed only their cosmetics, shampoo, hygiene products, and other personal-care items.

Group 4: Food with less contact with plastic + plastic-free kitchen tools + personal-care products
Participants reduced plastic exposure from several sources at the same time.

Group 5: Control group
These participants changed nothing. They continued eating as usual, using the same packaging and containers, and following their regular routines.

This allowed researchers to compare what happened when people changed everyday habits — and when they didn’t.

What Changes Did Participants Make?

The researchers looked at even the smallest details. For example:

– plastic kitchen tools were replaced with wooden, metal, or glass alternatives
– food was kept away from plastic where possible
– participants were encouraged to heat food in glass containers
– some plastic food-storage products were replaced

The goal was to reduce everyday contact with plastic as much as possible.

The Results Were Surprising

In just seven days, levels of some plastic-related chemicals dropped significantly.

The most striking findings:

– bisphenol F (BPF) levels dropped by up to 60%
– levels of some phthalates also decreased

This suggests that some of these chemicals may not stay in the body for long — and that their levels can respond fairly quickly to changes in our environment and daily habits.

What Had the Biggest Impact on Plastic Exposure?

When researchers looked at the results, they noticed some clear patterns.

Higher levels of plastic-related chemicals were more often linked to:

Ultra-processed foods
The more ultra-processed food people ate, the higher their exposure to some plastic-related chemicals tended to be.

Food packaged in plastic
Food packaging appeared to be one of the most important possible sources of exposure.

Canned foods
The inner lining of some cans may be linked to bisphenol exposure.

Frequent use of plastic in the kitchen
Food containers, plastic dishes, cutting boards, utensils, and other kitchen items were also linked to higher levels of plastic-related chemicals.

What About Cosmetics?

The study also found that levels of some phthalates were linked to the use of:

– cosmetics
– shampoos
– makeup products

Artificial fragrance, often listed as parfum or fragrance, can be one possible source of phthalates in these products.

What Happened in the Control Group?

Interestingly, in the group that made no changes, levels of some plastic-related chemicals increased rather than decreased.

Over one week, levels of two compounds — mono-n-butyl phthalate and monobenzyl phthalate — rose by around 40% and 55%.

This suggests that exposure to these chemicals is ongoing in everyday life.

What Can We Change in Everyday Life?

The goal isn’t to live completely plastic-free. Today, that’s nearly impossible.

But this study suggests that even small changes may help reduce exposure to some plastic-related chemicals.

The study authors suggest starting with simple steps:

– avoid heating food in plastic containers
– avoid plastic cutting boards
– choose glass or stainless-steel containers more often
– use a glass or metal water bottle
– eat fewer canned foods
– limit ultra-processed foods
– choose cosmetics and personal-care products with fewer artificial fragrances

The Study Has Limitations

While the findings are promising, the researchers also noted several important limitations.

The study could not:

– measure exactly how much exposure came from food in the control group
– show whether results were different for women and men, because the group was too small
– show a direct link between these chemicals and specific health conditions

So, these results should not be seen as proof that plastic directly causes specific diseases.

What Can We Take Away From This Study?

This study highlights two important things.

First, traces of chemicals used in plastic production can now be found in almost everyone’s bodies.

Second, even small everyday changes may lower levels of some of these chemicals in as little as one week.

This is not a reason to fear plastic or throw away every plastic item at home. But it is a reminder that everyday choices — how we store food, what we heat it in, and which personal-care products we use — may matter more than we once thought.