Are We Eating a Credit Card's Worth of Plastic Each Week?

How Microplastics Are Sneaking Into Our Diet – And What We Can Do

As a pediatric endocrinologist, I’ve spent years studying how environmental factors impact children’s health. But one of the most alarming discoveries in recent years isn’t a new disease—it’s the fact that we may be eating a credit card’s worth of plastic every week.

Yes, really. A study by Newcastle University estimates that the average person ingests 5 grams of microplastics weekly—roughly the weight of a credit card (Newcastle University, 2019).

These microscopic plastic particles aren’t just in our food—they’re in our drinking water, seafood, packaged goods, and even the air we breathe. And the scariest part? We don’t yet fully understand their long-term health effects.

Let’s break down how microplastics enter our bodies, their potential risks, and what we can do to reduce exposure.

What Are Microplastics?

Microplastics are tiny plastic particles, less than 5 millimeters in size, that either come from broken-down plastic waste or are intentionally added to products (like exfoliating beads in skincare). Because they’re so small, they easily infiltrate food, water, and the air we breathe.

How Are We Consuming Microplastics?

1. Bottled & Tap Water

• A study by Orb Media found that 93% of bottled water brands contain microplastics (Mason et al., 2018).
• Tap water isn’t exempt—plastic particles have been found in municipal water supplies worldwide.

2. Processed & Packaged Foods

• Plastic packaging can leach microplastics into food, especially when heated.
• Microplastics have been detected in salt, sugar, and even fruits and vegetables (Conti et al., 2020).

3. Seafood & Fish

• Plastic waste pollutes the ocean, and marine animals ingest these particles.
• If you eat fish or seafood, you may be consuming microplastics, too (Rochman et al., 2015).

4. Baby Bottles & Plastic Sippy Cups

• Heating formula in plastic bottles releases millions of microplastic particles per liter (Li et al., 2020).
• Infants may ingest more microplastics than adults due to formula preparation methods.

5. Household Dust & Airborne Particles

• Microplastics are in the air, meaning we breathe them in daily.
• Indoor dust contains synthetic fibers from carpets, furniture, and clothing (Prata et al., 2020).

Are Microplastics Harmful to Our Health?

Although research is still ongoing, studies suggest microplastics may have serious health consequences, particularly for children.

🔴 Hormone Disruption (Endocrine Effects)

Many plastics contain endocrine-disrupting chemicals like BPA and phthalates, which can affect puberty, metabolism, and growth (Gore et al., 2015).

🔴 Gut & Immune System Damage

Microplastics may disrupt gut bacteria and cause inflammation, potentially leading to chronic issues like IBS or autoimmune conditions (Schwabl et al., 2018).

🔴 Neurodevelopmental Concerns

Some research suggests microplastics carry toxic heavy metals that may affect brain development in children (Campanale et al., 2020).

How to Reduce Microplastic Exposure

While we can’t avoid microplastics entirely, these steps can help limit exposure:

✅ Switch to Glass or Stainless Steel

• Avoid heating food in plastic containers, baby bottles, or sippy cups.

✅ Filter Your Drinking Water

• Use a reverse osmosis filter to remove microplastics from tap water.

✅ Limit Processed & Packaged Foods

• Fresh, whole foods have lower microplastic contamination than packaged meals.

✅ Vacuum & Dust Regularly

• Microplastics accumulate in household dust, so keeping floors clean helps.

✅ Be Mindful of Seafood Consumption

• Smaller fish (like sardines) may contain fewer microplastics than larger species (like tuna).

Frequently Asked Questions (FAQ)

1. Is it true that we eat a credit card’s worth of plastic each week?

Yes, according to Newcastle University, the average person ingests up to 5 grams of microplastics per week—the weight of a credit card (Newcastle University, 2019).

2. Are microplastics harmful to children?

Early research suggests microplastics may disrupt hormones, gut health, and immune function, making children particularly vulnerable (Gore et al., 2015).

3. Can microplastics be removed from drinking water?

Yes! Reverse osmosis filters are one of the best ways to reduce microplastics in tap water.

4. Do plastic baby bottles release microplastics?

Yes, when heated, plastic baby bottles release millions of microplastic particles per liter (Li et al., 2020). Switching to glass bottles is a safer option.

Final Thoughts From our Pediatric Endocrinologist

As a doctor, I see firsthand how environmental toxins impact children’s health. While microplastics are a growing concern, small changes—like switching to glass containers, filtering water, and choosing fresh foods—can help reduce exposure.

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