The Effects of Microplastics on Your Health & How to Reduce Them
Andrew Huberman discusses the pervasive nature of microplastics and nanoplastics, their presence in human tissues, and potential health impacts. He provides actionable strategies to minimize exposure to these plastics and endocrine disruptors like BPA, BPS, phthalates, and PFAS, while also enhancing the body's detoxification processes.
Deep Dive Analysis
18 Topic Outline
Microplastics: Pervasiveness and Potential Health Impacts
Defining Microplastics and Nanoplastics; Ingestion Concerns
Microplastics Found in Human Tissues and Biological Barriers
Limiting Exposure: Avoiding Plastic Water Bottles and Filtering Water
Limiting Exposure: Choosing Non-Marine Salt Sources
Limiting Exposure: Avoiding Canned Soups and BPA/BPS
Limiting Exposure: Safe Microwave Practices and Paper Cup Alternatives
Advancements in Microplastic and Nanoplastic Measurement
Correlative Health Impacts: IBS and Gut Microplastics
Correlative Health Impacts: Phthalates, Testosterone, and Reproductive Health
Correlative Health Impacts: Polyethylene in Arterial Plaques and PFAS
Enhancing Detoxification: Liver Phase One and Phase Two Processes
Enhancing Detoxification: Sulforaphane from Cruciferous Vegetables
Enhancing Detoxification: Fiber Intake, Cookware Choices, and Carbonated Water
Enhancing Detoxification: The Role of Sweating
Limiting Exposure: Packaged Foods and Sustainable Clothing Practices
Limiting Exposure: Microwave Popcorn, Toothpastes, and Receipts
Microplastics and the Developing Brain: Autism and ADHD (Rebuttal)
8 Key Concepts
Microplastics
Small plastic particles ranging from one micron (one one-thousandth of a millimeter) up to five millimeters in diameter, found ubiquitously in the environment and human body. They are durable and not easily biodegradable, posing potential health concerns.
Nanoplastics
Plastic particles smaller than one micron in diameter, which are particularly concerning due to their ability to cross stringent biological barriers like the blood-brain barrier and lodge in sensitive tissues. They are found in high abundance in bottled water and human tissues.
Blood-Brain Barrier (BBB)
A protective barrier that prevents many molecules from entering the brain tissue, designed to safeguard neurons. Microplastics and nanoplastics, especially the latter, have been shown to cross this barrier and accumulate in the brain.
Endocrine Disruptors (BPA, BPS, Phthalates)
Chemicals like bisphenol A (BPA), bisphenol S (BPS), and phthalates that interfere with the body's hormone systems. They can mimic or block natural hormones like estrogen and testosterone, potentially affecting reproductive function, development, and increasing cancer risk.
PFAS ("Forever Chemicals")
Per- and polyfluoroalkyl substances, a group of long-lasting chemicals that are very persistent in the environment and human body. They are known to cause liver damage and immune system issues, and are found in various products including some carbonated waters.
Phase One Liver Detoxification
Also known as the oxidation phase, this liver process uses cytochrome P450 enzymes to convert toxins into less harmful components. It works in conjunction with Phase Two detoxification to prepare substances for excretion.
Phase Two Liver Detoxification
Also known as the conjugation phase, this liver process attaches molecules to broken-down toxins, making them water-soluble and easier to excrete from the body, primarily through urine. It is thought to play a primary role in removing microplastics and associated endocrine disruptors.
Sulforaphane
A compound found in cruciferous vegetables like broccoli and cauliflower, known to enhance Phase Two liver detoxification processes. Increasing its intake, either through diet or supplementation, may help the body excrete toxins and endocrine disruptors.
12 Questions Answered
Microplastics are small plastic particles ranging from 1 micron to 5 millimeters, while nanoplastics are even smaller, less than 1 micron in diameter. They are ubiquitous in the environment and can enter the human body.
They are found in virtually every human tissue and organ, including the brain, testes, follicles, liver, lungs, bloodstream, placenta, and even in a baby's first stool (meconium).
While an earlier study suggested a credit card's worth of plastic is ingested weekly, a newer analysis claims this was an overestimate by a million-fold, suggesting it would take 23,000 years to consume that much.
Avoiding plastic water bottles, especially those that have been heated, and using a reverse osmosis filter for tap water are effective strategies to significantly reduce microplastic and nanoplastic ingestion.
Yes, sea salt contains microplastics due to the prevalence of plastic pollution in the ocean. It is recommended to use non-marine salt sources like pink Himalayan salt to reduce exposure.
Yes, a study showed that consuming one serving of canned soup daily for five days led to over a 1,000% increase in urinary Bisphenol A (BPA), a known endocrine disruptor, likely from the can lining.
It is generally advised to avoid microwaving food in plastic containers, even if labeled 'microwave safe,' as they can leach microplastics and endocrine disruptors. Paper cups with hot liquids can also leach BPAs, BPSs, and microplastics from their linings.
PFAS (per- and polyfluoroalkyl substances) are a group of chemicals known as 'forever chemicals' because they are highly persistent and do not break down easily in the environment or the human body, posing risks like liver damage and immune system disruption.
The liver's Phase Two detoxification processes can be enhanced by increasing intake of sulforaphane (found in cruciferous vegetables or supplements) and ensuring adequate dietary fiber, which helps bind lipophilic molecules and facilitates their excretion through the bowel.
Yes, elevated levels of phthalate metabolites are associated with decreased serum testosterone levels in men, women, and children, with the strongest effects observed in individuals aged 40 to 60 years.
While some animal studies show neurological disruptions and some human correlative data exists, the evidence is currently very weak to conclude a causal role of microplastics or nanoplastics in autism, ADHD, or other neurodevelopmental disorders.
Yes, receipts are a rich source of BPAs, which can be absorbed through the skin, especially if hands are moisturized or if receipts are handled frequently. It's best to opt for electronic receipts or use nitrile gloves if handling them often.
24 Actionable Insights
1. Engage in Regular Therapy
Consider regular therapy as important as physical exercise for overall health, as it provides rapport, emotional support, directed guidance, and useful insights for personal and professional life.
2. Use Electrolyte Supplement
Dissolve one packet of Element (sodium, magnesium, potassium, no sugar) in 16-32 ounces of water first thing in the morning and during physical exercise, especially on hot days, to ensure proper hydration and electrolyte balance for optimal brain and bodily function.
3. Limit Microplastic Exposure (Pregnant/Children)
Pregnant individuals, young children, and those with young children should actively strive to limit their exposure to microplastics due to potential health concerns and documented exposure in fetuses and newborns.
4. Avoid Plastic Water Bottles
Limit exposure to microplastics and nanoplastics by avoiding drinking water from plastic bottles, especially those that may have been heated, as they contain significantly higher particle counts than previously thought.
5. Use Non-Plastic Water Vessels
Opt for reusable stainless steel, ceramic, or glass bottles and mugs for water consumption to reduce exposure to microplastics and nanoplastics and decrease waste.
6. Filter Tap Water (Reverse Osmosis)
Install a reverse osmosis filter for tap water to remove microplastics and nanoplastics, and ensure to remineralize the water afterward, which can be cost-effective compared to buying disposable bottled water.
7. Avoid Canned Soup
Avoid consuming canned soup, as its lining can lead to a significant increase (over 1000%) in urinary BPA; if consuming, ensure the product explicitly states ’no BPA’ and ideally no BPS or phthalates.
8. Avoid Microwaving Plastic
Do not microwave food in plastic containers, even if labeled ‘microwave safe,’ to prevent exposure to microplastics, nanoplastics, BPAs, BPSs, and phthalates leaching into your food.
9. Avoid Hot Liquids in Paper Cups
Do not put hot liquids into paper cups with plastic linings, as heat can leach microplastics, nanoplastics, BPAs, and BPSs; instead, transfer hot beverages to a ceramic or stainless steel mug.
10. Carry Reusable Mug
Carry a reusable ceramic or stainless steel travel mug for hot beverages to avoid exposure to microplastics and endocrine disruptors from paper cups and plastic lids, reducing waste and potentially saving costs.
11. Choose Non-Marine Salt
To lower exposure to microplastics and nanoplastics, use pink Himalayan salt or other non-marine salt sources instead of sea salt, which often contains microplastic particles.
12. Use Non-Toxic Cookware
Avoid nonstick pans and instead cook mainly with cast iron or ceramic cookware, ensuring they are explicitly BPA, BPS, and PFAS-free to reduce exposure to these harmful chemicals.
13. Avoid Microwave Popcorn
Avoid microwave popcorn and other food items in bags or containers with linings that prevent oily stains, as these are often rich sources of microplastics, nanoplastics, and endocrine disruptors.
14. Reduce Plastic-Packaged Food
Limit consumption of food packaged in plastic by shopping at farmer’s markets and bringing your own reusable bags or baskets to reduce exposure of fruits and vegetables to plastic.
15. Reuse Clothing Longer
Reduce the purchase and disposal of clothing, and instead reuse existing clothing for longer periods, as this helps diminish the release of microfibers and dyes into the environment, which are major sources of microplastics.
16. Use Microfiber Laundry Filters
Use laundry filters like a ‘guppy bag’ or install washing machine filters to trap microfibers shed from clothing during washing, preventing their release into the environment as microplastics.
17. Use Tooth Tablets (Plastic-Free)
To avoid ingesting microplastics and nanoplastics from traditional toothpaste tubes, consider using tooth tablets, especially those packaged in glass jars, which also offer convenience for travel.
18. Minimize Receipt Contact
Reduce exposure to BPAs from receipts by using nitrile gloves if handling them frequently for work, or opt for electronic receipts or no receipt when making purchases.
19. Avoid Lotions Before Handling Receipts
Do not apply sunscreen or lotions to your hands before handling receipts, as this can increase the absorption of BPAs from the receipts into your bloodstream.
20. Inspect Product Packaging
Actively inspect the packaging of cans (for drinks and food) and cookware to ensure they are free from BPAs, BPSs, and PFAS ‘forever chemicals,’ and make purchasing choices accordingly to limit exposure.
21. Increase Sulforaphane Intake
Enhance phase two liver detoxification processes, which help remove toxins like BPAs and BPSs, by increasing intake of sulforaphane found in cruciferous vegetables like raw or lightly cooked broccoli and cauliflower, or consider supplementing (e.g., 50mg/day).
22. Ensure Adequate Dietary Fiber
Increase dietary fiber intake through fruits, vegetables, and starches to help bind and excrete lipophilic molecules like microplastics, nanoplastics, BPAs, BPSs, phthalates, and PFASs from the body via the bowel.
23. Induce Sweating Regularly
Engage in activities that induce robust sweating, such as sauna, hot baths, hot yoga, or intense exercise, at least once a week, as sweating may help remove endocrine disruptors attached to microplastics and nanoplastics.
24. Choose Low-PFAS Carbonated Water
If consuming carbonated water, opt for brands with lower PFAS levels like San Pellegrino (0.31 ppt) or Perrier (1.1 ppt) over those with higher levels like Topo Chico (9.76 ppt, even after reduction), to limit exposure to ‘forever chemicals’.
5 Key Quotes
Microplastics are indeed everywhere.
Andrew Huberman
You have microplastics in essentially every organ and tissue of your body right now.
Andrew Huberman
The argument based on what seemed to be a pretty high quality publication that you may have heard is that every single week we ingest up to a credit card's worth of microplastics and nanoplastics. ... This newer analysis of the same data claims that the credit card's worth of plastic that it was argued we consume every week, well, that was an overestimate by a million fold.
Andrew Huberman
consumption of one serving of canned soup daily over the course of five days... was associated with more than 1,000% increase in urinary BPA.
Andrew Huberman
Sweating is an incredible mechanism.
Andrew Huberman
2 Protocols
Protocol for Minimizing Microplastic and Endocrine Disruptor Exposure
Andrew Huberman- Avoid plastic water bottles and opt for stainless steel, ceramic, or glass bottles.
- Consider installing a reverse osmosis filter for tap water to remove microplastics, nanoplastics, and other contaminants, remineralizing if necessary.
- Choose non-marine salt sources like pink Himalayan salt to avoid ocean microplastics.
- Avoid canned soups and other foods packaged in plastic, especially those with oily or acidic contents, unless explicitly labeled as free of BPA, BPS, and phthalates.
- Do not microwave food in plastic containers, even if labeled 'microwave safe'; transfer food to glass or ceramic before microwaving.
- Use reusable ceramic or stainless steel mugs for hot coffee or tea instead of paper cups with plastic linings or plastic lids.
- Prioritize cooking with cast iron or ceramic pans that are certified BPA, BPS, and PFAS free, avoiding nonstick coatings.
- If consuming carbonated water, choose brands with lower detected levels of PFAS, such as San Pellegrino or Perrier, over those with higher levels like Topo Chico.
- Reduce clothing overconsumption by reusing existing clothing for longer periods to minimize microfiber shedding and environmental plastic waste.
- Avoid microwave popcorn, as the linings of microwave popcorn bags are a rich source of microplastics and endocrine disruptors.
- Use alternative toothpastes, such as tooth tablets in glass jars (e.g., with hydroxyapatite), to avoid plastic tubes and potential ingestion of microplastics.
- Opt for electronic receipts or use nitrile gloves if frequently handling thermal paper receipts, which are rich in BPAs.
Protocol for Enhancing Liver Detoxification and Toxin Excretion
Andrew Huberman- Increase sulforaphane intake by consuming cruciferous vegetables like broccoli and cauliflower (lightly cooked or raw) or consider supplementing with 50 milligrams of sulforaphane per day to enhance Phase Two liver detoxification.
- Ensure adequate dietary fiber intake from fruits, vegetables, and starches to help bind lipophilic molecules and facilitate their excretion through the bowel.
- Engage in deliberate sweating at least once a week through activities like sauna, hot baths, or intense exercise, as sweating can help remove some endocrine disruptors and other toxins attached to microplastics.