How Microplastics Are Ruining Your Health - Dr Rhonda Patrick - #907
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⚡Myth Buster· 1
⚡Myth Buster98:30
Added Sugar Rapidly Lowers Testosterone
Consuming 75 grams of added sugar causes a 25% drop in circulating testosterone within two hours. This effect is transient but concerning for those with high-sugar diets.
75 grams of added sugar (e.g., doughnut and soda) reduces testosterone by 25% in 2 hours.
The effect is temporary but repeated exposure may have long-term impacts.
This applies to all age groups, from young men to older adults.
Chronic sugar intake contributes to hormonal imbalance.
“Men... if they consumed 75 grams of added sugar... this caused a 25% decrease in their circulating testosterone within a 2-hour range.”
What Are Microplastics and How They Enter the Body
Microplastics are tiny plastic particles ranging from 5 micrometers down to 100 nanometers in size. They enter the body primarily through ingestion of contaminated food and water, and inhalation from the air. Common sources include plastic-packaged foods, bottled water, and airborne particles from clothing and tires.
Microplastics range from visible particles (like a grain of rice) to nanoplastics too small to see.
They enter the body via food, beverages, and inhalation.
Water treatment plants do not filter out microplastics, so tap and bottled water are both contaminated.
Clothing made of polyester and nylon sheds microplastics when washed or dried.
“Microplastics themselves are getting into food... as we consume whatever food they're contained in.”
Microplastics Accumulate in the Brain 10–20x More Than Other Organs
Studies show microplastics accumulate in the brain at levels 10 to 20 times higher than in other organs. This is likely due to inhalation, as nanoparticles can bypass the blood-brain barrier via olfactory neurons, in addition to entering through the bloodstream after ingestion.
Microplastics are found in the brain, heart, liver, kidneys, lungs, and reproductive organs.
Inhalation allows direct access to the brain via the olfactory pathway.
Nanoplastics are small enough to cross the blood-brain barrier.
A study found people with dementia had 10 times more microplastics in their brains than those without.
“Microplastics seem to accumulate in the brain 10 to 20 times more than other organs.”
“People with dementia had 10 times more microplastics in their brains than people that did not have dementia.”
BPA and Other Chemicals in Plastics Disrupt Hormones
Bisphenol A (BPA), phthalates, and BPS are endocrine-disrupting chemicals found in plastics. They mimic estrogen, interfere with hormone receptors, and are linked to lower testosterone, reproductive issues, and developmental problems in children.
BPA and phthalates are known as xenoestrogens because they mimic estrogen.
They bind to estrogen and androgen receptors, disrupting hormone signaling.
BPA-free products often contain BPS, which behaves similarly to BPA.
Exposure is linked to lower testosterone, sperm abnormalities, and developmental issues.
“BPA, BPS... these are chemicals that are often referred to as xenoestrogens because they mimic estrogen in the body.”
Major sources of microplastic exposure include bottled water, unfiltered tap water, heating food in plastic containers, to-go coffee cups, tea bags, and black plastic containers made from recycled electronics containing carcinogens.
Bottled water and unfiltered tap water are significant sources.
Heating plastic increases microplastic shedding by breaking down the material.
To-go coffee cups and tea bags release millions of particles when hot water is added.
Black plastic containers often contain carcinogenic flame retardants from recycled electronics.
“Tea bags themselves are made of either polypropylene, they're made of nylon... you can get anywhere between millions to billions of microplastic particles per milliliter.”
Both fermentable and non-fermentable dietary fiber help reduce microplastic absorption. Fermentable fiber forms a gel that traps microplastics, while non-fermentable fiber speeds transit time, promoting excretion through feces.
Fermentable fiber (from fruits, vegetables) forms a viscous gel that encapsulates microplastics.
Non-fermentable fiber moves contents through the intestines faster.
Both types help prevent microplastics from being absorbed into the bloodstream.
Animal studies suggest up to 2.5% of ingested microplastics are absorbed.
“Fermentable fiber... is fermented into like this viscous gel that encapsulates microplastics and nanoplastics and stops them from being absorbed.”
#fiber#gut-health#microplastics#digestion#diet
✶Explainer92:00
Ultra-Processed Foods Cause Overeating and Weight Gain
A NIH study found people on an ultra-processed diet consumed 500 more calories per day and gained 2 pounds in two weeks, while those on a whole foods diet lost weight. This is due to poor satiety, disrupted hormones, and the protein leverage hypothesis.
Ultra-processed foods lead to overeating due to poor satiety signals.
Added sugar disrupts leptin and ghrelin, hormones that regulate hunger.
The protein leverage hypothesis suggests people overeat to meet protein needs.
Fiber content in whole foods helps regulate appetite and digestion.
“When they were eating the ultra-processed foods, people on average ate 500 calories more... and they ended up gaining 2 lbs more.”
Consumer Reports found high levels of PFAS (forever chemicals) in organic milk and dairy products. These chemicals come from sludge used as fertilizer on farms, which contaminates both organic and non-organic produce.
PFAS are not filtered out by wastewater treatment plants.
Sludge from wastewater is used as fertilizer, contaminating soil and crops.
Organic farms near conventional farms can be affected by runoff.
Cows excrete PFAS through milk, making dairy a key exposure route.
“Consumer Report found that lots of products including the organic ones had much much higher levels of PFAS than are considered safe.”
Thermal paper receipts are coated with BPA, which can be absorbed through the skin, especially when hands are moist or greasy. Cashiers and others who handle receipts frequently are at higher risk and should wear nitrile gloves.
Thermal receipts have a white coating containing BPA.
BPA can be absorbed through the skin, especially with hand sanitizer or lotion.
Nitrile gloves block absorption; latex does not.
Frequent handling increases exposure risk.
“Receipts are coated with BPA because there's a thermal reaction that happens when heat is applied to the BPA it prints text on the receipt…”
Key strategies include using reverse osmosis water filters, avoiding plastic bottles and heating plastic, choosing glass or stainless steel containers, using HEPA air filters, and minimizing use of personal care products with 'fragrance' or 'parfum' on the label.
Use reverse osmosis filtration to remove microplastics and chemicals from water.
Avoid heating food in plastic containers or using plastic utensils.
Choose glass, stainless steel, or ceramic cookware and storage.
Use HEPA filters to reduce airborne microplastics.
Avoid personal care products with 'fragrance' or 'parfum' due to phthalates.