In 2022, scientists published a landmark study finding microplastics in human blood for the first time. Since then, researchers have found them in human lungs, placentas, breast milk, and even brain tissue. Microplastics, tiny plastic fragments less than 5mm in size, are everywhere, and your kitchen may be one of the biggest sources of daily exposure.
Here's what the science says, and practical steps you can take to significantly reduce the amount of plastic entering your body through your food.
What Are Microplastics?
Microplastics are tiny fragments that result from the breakdown of larger plastic items. They come in two forms:
- Primary microplastics: Manufactured at a small size, like microbeads in personal care products
- Secondary microplastics: Created when larger plastic items degrade due to UV exposure, heat, or physical wear
Both types are now found throughout the global environment, in oceans, soil, drinking water, and the food we eat.
How Microplastics Get Into Your Food
The kitchen is a surprisingly significant source of microplastic exposure. Here's how they get into your meals:
Plastic Food Containers and Bags
Every time you heat food in a plastic container, wash a plastic container in the dishwasher, or store acidic foods like tomatoes in plastic, the plastic degrades slightly and releases particles into your food. Scratched or worn plastic containers shed significantly more microplastics than new ones.
The fix: Switch to glass food storage. Glass is completely inert, it doesn't react with food under any conditions and doesn't shed particles. Our Glass Food Storage Jars with Wood Lids are a direct, effective replacement for plastic containers.
Plastic Cutting Boards
A 2023 study estimated that cutting on a plastic cutting board releases millions of microplastic particles annually into food. Every knife stroke shaves tiny plastic fragments directly into whatever you're chopping.
The fix: Switch to a wood cutting board. Wood is a natural material that doesn't shed microplastics, has natural antibacterial properties, and lasts for decades with proper care. Our Walnut Wood Cutting Board is a beautiful, durable choice that will serve your kitchen for years.
Plastic Utensils
Plastic spatulas and spoons exposed to heat can release microplastic particles directly into your food while you cook. It's one of the most direct and overlooked sources of kitchen plastic exposure.
The fix: Replace plastic cooking utensils with a natural wood alternative. Our Natural Acacia Wood Kitchen Utensil Set covers all your daily cooking needs without a single piece of plastic.
Non-Stick Cookware
PTFE-coated non-stick pans release microparticles when scratched or overheated. Research suggests that a single scratch on a non-stick pan can release thousands of microplastic particles.
The fix: Switch to cast iron, stainless steel, or ceramic cookware. These materials are durable, non-toxic, and don't degrade into your food.
Plastic Wrap and Bags
Plastic wrap, zip-lock bags, and plastic produce bags all contribute to microplastic exposure, both through direct food contact and through environmental degradation.
The fix: Our Beeswax Food Wraps are a natural, washable alternative to plastic wrap and are fully compostable at the end of their life. For longer-term storage, glass containers are the most reliable plastic-free option.
Tea Bags
Many conventional tea bags are sealed with polypropylene plastic. A single plastic tea bag steeped in hot water can release billions of microplastic particles into your cup.
The fix: Look for loose-leaf tea with a stainless steel infuser, or brands that use plastic-free paper tea bags.
The Science: Should You Be Concerned?
Research into the health effects of microplastics is still developing, but early findings are concerning:
- A 2024 study found that people with microplastics in their arterial walls had a significantly higher risk of heart attack, stroke, and death
- Animal studies have linked microplastic exposure to inflammation, hormonal disruption, and damage to the gut microbiome
- The average person is estimated to ingest approximately 5 grams of plastic per week, roughly the weight of a credit card
While the full extent of health impacts isn't yet known, the precautionary principle suggests reducing exposure where possible, particularly through direct food contact.
How to Reduce Your Microplastic Exposure
You can't eliminate microplastic exposure entirely, since they're now present in the air, water, and food supply regardless of what you do. But you can significantly reduce your direct exposure through a few targeted swaps:
1. Replace plastic food storage with glass
This is the single highest-impact change you can make. Glass doesn't shed particles under any conditions. Our Glass Food Storage Jars are a beautiful, practical replacement.
2. Switch to a wood cutting board
Eliminate one of the most direct sources of microplastic ingestion in food preparation. Our Walnut Wood Cutting Board pairs beautifully with the rest of a natural kitchen setup.
3. Replace plastic cooking utensils
Our Natural Acacia Wood Kitchen Utensil Set is an easy, complete swap from plastic tools to natural ones.
4. Never heat food in plastic
If you haven't switched to glass storage yet, at minimum avoid microwaving food in plastic containers or covering hot food with plastic wrap.
5. Filter your tap water
Microplastics are present in most tap water. A quality water filter certified to remove microplastics can significantly reduce what you drink.
6. Replace worn plastic items immediately
Scratched, cloudy, or worn plastic containers and utensils shed far more microplastics than new ones. When in doubt, replace.
Small Swaps, Real Impact
The research on microplastics is still emerging, but the direction is clear: less plastic in your kitchen means less plastic in your body. The good news is that the alternatives to plastic are often better in every way, more durable, better looking, and free from the chemical concerns that come with plastic.
At Aster, every product we carry is chosen with exactly this in mind, natural materials, thoughtful design, and real utility. Explore our plastic-free kitchen collection and start reducing your microplastic exposure today.