Knowledge Base

Everything You Need to Go Deeper.

Articles, research summaries, a TEDx talk, frequently asked questions, media appearances, and downloadable guides — all in one place.

From the Blog

Latest Articles

FEATURE · HEALTH SCIENCE

The 2024 NEJM Study That Should Have Changed Everything We Know About Microplastics

A landmark New England Journal of Medicine study found that patients with microplastics in their arterial plaques faced a 4.5× higher rate of cardiovascular events. We break down what the study found, what it means, and why it matters to you right now.

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WATER · 8 MIN READ

Is Bottled Water Worse Than Tap? What the Microplastic Data Actually Shows

Studies consistently find higher microplastic concentrations in bottled water than in filtered tap water — often by a factor of 22. Here is what you need to know.

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PARENTING · 10 MIN READ

Microplastics in Infant Feeding: What Parents Need to Know Right Now

Microplastics have been detected in breast milk, placental tissue, and baby formula prepared in polypropylene bottles. A physician's guide for parents.

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ENDOCRINOLOGY · 7 MIN READ

BPA-Free Doesn't Mean Safe: The New Generation of Plastic Endocrine Disruptors

BPS and BPF — the plasticizers used to replace BPA — exhibit similar or greater hormonal disruption in emerging studies. What you need to know.

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NEUROLOGY · 9 MIN READ

Plastic in the Brain: What We Know About Nanoplastics and Neurological Risk

Nanoplastics have been confirmed in human brain tissue. We examine what the current science says and what it does — and does not — imply about neurological health.

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ENVIRONMENT · 6 MIN READ

From Ocean to Organ: How Environmental Plastic Contamination Becomes Human Health Crisis

The environmental and human health dimensions of microplastics are not separate problems. We trace the pathway from ocean pollution to human exposure.

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NUTRITION · 8 MIN READ

The Plastic in Your Diet: A Category-by-Category Guide to Dietary Microplastic Sources

From sea salt to tea bags to canned goods — a systematic breakdown of where microplastics enter the food supply and what you can do at each step.

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TEDx Talk

Watch: "What Plastic Is Doing to the Human Body"

Dr. Elie R. Haddad delivers a physician's-eye view of the microplastic crisis — covering what the research shows, why it matters now, and what individuals and societies can do in response.

The biology of microplastic exposure
Landmark findings from 2021–2024
Why precautionary action is justified
Practical steps individuals can take today

Elie R. Haddad, MD

"What Plastic Is Doing to the Human Body"

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Frequently Asked Questions

Clear Answers to Common Questions

The honest answer is: the evidence is concerning and growing rapidly, but not yet definitive for most specific health endpoints in humans. What we know: microplastics are present in virtually every human organ studied. The 2024 NEJM study found a significant association between arterial microplastics and cardiovascular events. Animal and cellular studies show inflammatory, endocrine-disrupting, and oxidative stress effects. The precautionary principle applies strongly here — especially given that exposure is ongoing and increasing. Waiting for complete certainty before reducing exposure may mean waiting too long.
Estimates vary, but a widely cited 2019 review estimated that the average adult ingests between 39,000 and 52,000 microplastic particles per year through food and water alone. When airborne inhalation is included, the figure rises to between 74,000 and 121,000. These are conservative estimates — detection and measurement technology has improved significantly since, and real-world numbers may be higher. The "credit card's worth of plastic per week" figure (approximately 5 grams) referenced in media coverage is a rough order-of-magnitude estimate, not a precise measurement.
Multiple studies have found higher microplastic concentrations in bottled water than in tap water — with some studies showing 22× the particle count. The plastic packaging itself is a source of leaching, particularly with temperature changes during shipping and storage. Filtered tap water using a certified carbon block or reverse osmosis system is generally the lower-exposure option. The recommendation from Homo Plasticus is to filter tap water rather than rely on bottled water.
The body eliminates some microplastics — particularly larger particles in the gastrointestinal tract — through normal excretion. However, nanoplastics and very small microplastics can cross biological barriers and accumulate in tissues. Studies have found plastics in organ tissue, blood, placenta, and brain. Whether the body has effective mechanisms for clearing these tissue deposits is not yet well understood. The practical implication: reducing ongoing exposure is more effective than assuming biological elimination will handle the accumulated burden.
Yes, there are several reasons for heightened concern in children. Their developing organ systems and immune responses may be more susceptible to disruption from endocrine-active chemicals associated with plastics. Higher food and water intake relative to body weight means higher per-kilogram exposure. Microplastics in breast milk and polypropylene baby bottles means exposure begins before solid food. Children also have more floor-level contact with household dust, which is a significant reservoir of microplastic fibers. The precautionary principle applies with greatest force for the youngest age groups.
As of 2025, consumer microplastic testing for individuals is not widely available in clinical practice. Research testing methods exist but are expensive, technically complex, and not standardized for clinical use. A small number of commercial labs have begun offering blood or stool testing, but interpretation guidelines and clinical reference ranges do not yet exist. The practical implication is that individual testing is not currently actionable in the way that, say, cholesterol testing is. The more productive focus remains on reducing ongoing exposure — which benefits everyone regardless of individual baseline.
If forced to choose one: filter your drinking water. Drinking water is among the most consistent daily exposure routes, and filtration is a well-validated, cost-effective, and immediately impactful intervention. A quality solid carbon block filter or reverse osmosis system reduces microplastic particle counts in drinking water significantly. The next highest-impact changes are: stop heating food in plastic, replace plastic food storage with glass or stainless, add a laundry microfiber filter, and improve indoor air filtration. These five steps together address the dominant exposure routes for most people.
Not necessarily. BPA (bisphenol A) was replaced in many products with BPS (bisphenol S) and BPF (bisphenol F) — compounds that emerging research suggests exhibit similar or greater endocrine-disrupting activity. This is a well-documented pattern in chemical substitution: when a harmful chemical is regulated out of a product, industry often replaces it with a structurally similar compound with comparable toxicological concerns. "BPA-free" labeling reduces one specific risk while potentially substituting another. The more reliable approach is to minimize plastic contact with food and drink altogether, regardless of BPA labeling.
In the Media

Interviews, Podcasts & Features

Dr. Haddad speaks and writes for audiences ranging from health professionals to the general public — bringing scientific rigor and communicative clarity to every appearance.

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Video Interview

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Media appearances are added as they are confirmed. Contact us for press and interview inquiries.

Free Downloads

Guides & Reference Materials

Concise, physician-reviewed materials you can save, share, and use.

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The 10-Point Plastic Exposure Audit

A quick self-assessment framework for identifying the highest-risk plastic exposure points in your daily routine. Free with newsletter signup.

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The Plastic-Free Grocery Guide

A room-by-room shopping guide for reducing plastic in your food supply — packaging choices, storage alternatives, and label-reading tips.

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Key Research Summary (2020–2024)

A curated summary of the most significant peer-reviewed findings on microplastics and human health published in the last four years.

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Photo of Dr. Haddad

The Founder

Elie R. Haddad, MD

"A physician whose work connects environmental exposure to human health."

Dr. Elie R. Haddad is a physician and health educator with a focus on the intersection of environmental medicine and human biology. Having tracked the rapidly evolving science of microplastic contamination in peer-reviewed literature, he founded Homo Plasticus to serve the gap between what research shows and what the public understands.

His approach is defined by scientific rigor and communicative clarity. He is committed to accurately representing the current state of evidence — including its limitations — rather than simplifying a complex story into a sensationalized one.

Dr. Haddad speaks nationally on microplastics and health, writes for both professional and public audiences, and believes that education is the first and most important form of preventive medicine.

For professional inquiries, media requests, or speaking engagements, please use the contact form below.

Work With Dr. Haddad

Speaking, Media & Press Inquiries

Dr. Haddad is available for keynote presentations, media interviews, podcast appearances, institutional consultations, and conference presentations on the science and public health implications of microplastic exposure.

Speaking Topics Include:

  • The State of the Science on Microplastics and Human Health
  • From Environmental Contamination to Medical Crisis
  • Practical Exposure Reduction: What the Evidence Supports
  • The Endocrine Disruption Problem and Plastic Chemistry
  • The Precautionary Principle in Environmental Medicine

Send an Inquiry

Or email directly: media@homoplasticus.com

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