Microplastics and Your Body: 7 Possible Health Risks You Should Know

Medical Writer: Oke Ikpekpe, MSc (PH)

Medical Reviewer: Nnenna Chiloli, MBBS, MPH

Highlights

• Microplastics are very small bits of plastic. They can get into your body from the food you eat, the water you drink, the air you breathe, and maybe from your skin too.
• These microplastics have been found in blood, lungs, stool, the placenta, and breast milk of humans.
• Scientists are still studying what these findings mean for long-term health.
• Some possible health effects include gut irritation, inflammation, hormone disruption, breathing problems, and reproductive effects.
• Pregnant women, infants, and young children may need special attention because early-life exposure is still being studied.
• Small lifestyle adjustments, such as drinking less water from plastic bottles or not heating food in plastic containers, can help reduce exposure.

Introduction

Plastic is everywhere now. We use it every single day in our daily lives. In the water you drink, the food you eat, the air, and even the wrap around your takeout meal. It might surprise you to learn that the plastic we use every day doesn't just disappear. It breaks down into tiny, often invisible pieces that have now been found in human blood, lungs, stool, placenta, and breast milk [1-4]. 

So, what are microplastics doing to our health?The honest answer? We are still learning, and early research has found some possible health effects worth knowing about.

In this article, we will walk you through what microplastics are, how they enter your body, potential problems they may cause, and the ways to reduce exposure.

What Are Microplastics?

Microplastics are very small bits of plastic. Most are smaller than a sesame seed. Some are so tiny you cannot see them with your eyes [2,3,4]. 

They come from two main places:

• First, bits that are made small on purpose. These are called primary microplastics. They are used in some face scrubs, toothpaste, makeup, and cleaning products [2,3]. 
• Second, bits that come from larger plastic break down. This is called secondary microplastics. It happens when plastic bottles, bags, food wrappers, synthetic clothes, fishing nets, and other plastic items slowly fall apart [3]. 

How do they break down? Sunlight, heat, rubbing, and weather all help break plastic into smaller and smaller pieces over time [2,3].

How Do Microplastics Enter Your Body?

There are three main ways these plastic bits can get inside you.

• The most common way is through food and drink. 

Microplastics have been found in seafood, tap water, bottled water, salt, honey, and milk [2,3].

• Through the air. 

Every time we walk across synthetic carpets, fold polyester or nylon clothes, or move around the house, tiny plastic fibres break off and can float in the air. You can breathe them in without knowing it [3,4].

• Through your skin. 

Although this pathway is not very clear. Larger bits probably do not go through healthy skin. But microscopic plastic dust or ingredients found in certain cosmetics can settle on the skin surface, which might occasionally cause mild skin irritation [5,6].

7 Possible Health Risks of Microplastics

Although science has not proven that microplastics directly cause chronic diseases or specific illnesses in humans. However, some of the possible health effects include

1. Digestive Irritation and Gut Changes

Since many plastic bits enter through food and drink, the stomach and gut are often the first places affected. Microplastics can bother the lining of your gut. They may also change the balance of good and bad bacteria living in your gut [2,3,5].

2. Inflammation and Cell Stress

Some studies suggest that microplastics may increase inflammation and oxidative stress [5]. This means that they may irritate tissues, cause swelling, and place stress on the body’s cells. If this happens repeatedly over time, it may affect how well cells work.

3. Hormone Disruption

Some plastics contain chemicals such as bisphenols and phthalates, which may interfere with hormones [2,5]. Hormones are like the body’s messengers. They help in controlling vital processes like how you grow, burn energy, and develop. So when chemicals disturb hormone signals, several body processes may be affected.

4. Possible Weight and Metabolic Effects

Some researchers are studying whether microplastics and certain plastic additives may act as “obesogens.” These are substances that could affect how your body stores fat and uses energy [6].This does not mean microplastics cause obesity. But early studies suggest they may be one environmental factor worth studying.

5. Breathing Problems

Tiny plastic fibres float in the air, especially inside our homes. When you breathe them in, some can settle in your airways or lungs [3,4].For most people, this is probably not a big problem. But for workers in some jobs, like making synthetic fabrics or plastic products, long-term exposure has been linked to coughing, wheezing, and lung disease [4,6].

6. Fertility, Pregnancy, and Early-Life Concerns

This is one area that worries many people, and for good reason.  Scientists have found microplastics in the placenta and in breast milk [1,5,6]. That means babies may be exposed to plastic before they are even born.Infants may also have a higher "plastic load" than adults. One study showed that making baby formula in polypropylene plastic bottles can release millions of tiny plastic bits into the milk [6]. 

7. Possible Effects on the Brain and Nerves

The smallest plastic bits, called nanoplastics, may act differently in the body than larger bits.Some animal studies suggest these very tiny bits can reach the brain. They may affect how nerves talk to each other. They might even affect learning or memory [4,5].

How to Reduce Your Exposure 

You cannot avoid plastic completely. It is everywhere, and exposure to plastic is also bigger than personal choices. The COVID-19 pandemic increased the use of disposable masks, gloves, and other single-use plastics. That said, you can still reduce your exposure to plastic by making these small practical changes: 

1. Reduce Bottling Water in Plastic Containers Where Possible 

Use glass or stainless-steel bottles when practical. If safe tap water is available, it may reduce exposure compared with drinking only bottled water. 

2. Avoid Heating Food in Plastic Containers 

Heat can make more plastic bits and chemicals get into your food [2,6]. Move your food to a glass or ceramic plate or bowl before microwaving. 

3. Be Careful With Plastic Tea Bags 

Choose loose-leaf tea or paper-based tea bags where possible, especially when using very hot water. 

4. Reduce Heavily Packaged Foods 

Fresh food often has less plastic packaging than processed food. Choosing more fresh food can help reduce unnecessary plastic packaging. 

5. Choose Personal Care Products Carefully 

Some face scrubs, body washes, and toothpastes have tiny plastic beads in them. Look for words like polyethylene or polypropylene on the label. Those are plastics. Avoid such products. 

6. Reduce Indoor Dust 

Plastic fibres from clothes and carpets end up in your house dust. Vacuum with a good filter. Wet mop your floors and open your windows when you can [4,6]. 

7. Handle Synthetic Textiles Mindfully 

Polyester, nylon, and acrylic shed tiny plastic fibres when you wash and wear them. You can reduce shedding by washing clothes less aggressively, using microfiber-catching laundry bags or filters, and choosing natural fibres when practical. 

Conclusion 

Microplastics are a reminder that the things that make life easier can sometimes leave traces we do not see. One plastic bottle or one takeaway pack is not the problem by itself. The bigger issue is how often plastic shows up in daily life, in the water we drink, the food we buy, the clothes we wear, and even the dust in our homes.

There is still a lot scientists are trying to understand. We do not yet know exactly how much exposure is too much, or what years of repeated exposure may mean for human health. But waiting for every answer does not mean doing nothing. You do not have to be afraid of plastic. Just be more intentional with it.

Frequently Asked Questions (FAQs) 

1. Are microplastics and nanoplastics the same? 

No. Microplastics are tiny plastic pieces smaller than 5 millimetres. Nanoplastics are even smaller, so researchers are studying whether they can move more easily through the body. 

2. Can the body remove microplastics naturally? 

Some microplastics can leave the body through stool. But very tiny particles may enter the bloodstream or body tissues. 

3. Does boiling water remove microplastics? 

No. Boiling does not destroy plastic. Although some studies suggest boiling and filtering might help a little, more research is needed. 

4. Should I stop eating seafood? 

No. Seafood still provides protein and healthy fats. But because microplastics have been found in some seafood, especially shellfish, it is wise to eat a varied diet and choose seafood from trusted sources. 

5. Why are plastic takeaway containers and baby bottles a concern? 

Heat can make some plastics release tiny particles and chemicals into food or drinks. You can reduce this by using glass bottles or by letting the formula cool in a glass container first. 

References

1. Mishra A, Modak S, Bhattacharjee S, Vishwanaath R, Mohan A, Kumar B. The invisible threat: microplastics in human blood and placenta. J Drug Deliv Ther [Internet]. 2024 Dec 15 [cited 2026 May 26];14(12):202-5. Available from: https://jddtonline.info/index.php/jddt/article/view/6923/6497
2. Ziani K, Ioniță-Mîndrican CB, Mititelu M, Neacșu SM, Negrei C, Moroșan E, et al. Microplastics: a real global threat for environment and food safety: a state of the art review. Nutrients [Internet]. 2023 [cited 2026 May 26];15(3):617. Available from: https://www.mdpi.com/2072-6643/15/3/617 doi:10.3390/nu15030617
3. Emenike EC, Okorie CJ, Ojeyemi T, Egbemhenghe A, Iwuozor KO, Saliu OD, et al. From oceans to dinner plates: the impact of microplastics on human health. Heliyon [Internet]. 2023 Sep 26 [cited 2026 May 26];9(10):e20440. Available from: https://www.sciencedirect.com/science/article/pii/S240584402307648X doi:10.1016/j.heliyon.2023.e20440
4. Lee Y, Cho J, Sohn J, Kim C. Health effects of microplastic exposures: current issues and perspectives in South Korea. Yonsei Med J [Internet]. 2023 May [cited 2026 May 26];64(5):301-8. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC10151227/ doi:10.3349/ymj.2023.0048
5. Li Y, Tao L, Wang Q, Wang F, Li G, Song M. Potential health impact of microplastics: a review of environmental distribution, human exposure, and toxic effects. Environ Health [Internet]. 2023 Aug 10 [cited 2026 May 26];1(4):249-57. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC11504192/ doi:10.1021/envhealth.3c00052
6. Kannan K, Vimalkumar K. A review of human exposure to microplastics and insights into microplastics as obesogens. Front Endocrinol (Lausanne) [Internet]. 2021 Aug 18 [cited 2026 May 26];12:724989. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC8416353/ doi:10.3389/fendo.2021.724989

Disclaimer:
The information provided on this website is for general educational and informational purposes only. It is not intended to replace professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

Published May 30, 2026