Mózg geriatryka zawiera 0,5% plastiku a z Alzheimerem 5%

I od razu jest znana przyczyna Alzheimera.
5% plastiku w mózgu
I wszysyko jasne.
300.000 kobiet diagnozowanych w Stanach z rakiem piersi rocznie
to kobiety z plastikiem w piersiach.
Plastik nie jest metabolizowany, ani rozpuszczany, a jedynie odkłada
się, odkłada, aż zaczyna wywoływać raka piersi
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Microplastics in Every Human Placenta, New UNM Health Sciences Research
Discovers
A flurry of recent studies has found that microplastics are present in
virtually everything we consume, from bottled water to meat and
plant-based food. Now, University of New Mexico Health Sciences
researchers have used a new analytical tool to measure the microplastics
present in human placentas.
In a study published February 17 in the journal Toxicological Sciences,
a team led by Matthew Campen, PhD, Regents’ Professor in the UNM
Department of Pharmaceutical Sciences, reported finding microplastics in
all 62 of the placenta samples tested, with concentrations ranging from
6.5 to 790 micrograms per gram of tissue.
Although those numbers may seem small (a microgram is a millionth of a
gram), Campen is worried about the health effects of a steadily rising
volume of microplastics in the environment.
Matthew Campen, PhD
    If we’re seeing effects on placentas, then all mammalian life on
this planet could be impacted. That’s not good.
— Matthew Campen, PhD, Regents’ Professor in the UNM Department of
Pharmaceutical Sciences
For toxicologists, “dose makes the poison,” he said. “If the dose keeps
going up, we start to worry. If we’re seeing effects on placentas, then
all mammalian life on this planet could be impacted. That’s not good.”
In the study, Campen and his team, partnering with colleagues at the
Baylor College of Medicine and Oklahoma State University, analyzed
donated placenta tissue. In a process called saponification, they
chemically treated the samples to “digest” the fat and proteins into a
kind of soap.
Then, they spun each sample in an ultracentrifuge, which left a small
nugget of plastic at the bottom of a tube. Next, using a technique
called pyrolysis, they put the plastic pellet in a metal cup and heated
it to 600 degrees Celsius, then captured gas emissions as different
types of plastic combusted at specific temperatures.
“The gas emission goes into a mass spectrometer and gives you a specific
fingerprint,” Campen said. “It’s really cool.”
The researchers found the most prevalent polymer in placental tissue was
polyethylene, which is used to make plastic bags and bottles. It
accounted for 54% of the total plastics. Polyvinyl chloride (better
known as PVC) and nylon each represented about 10% of the total, with
the remainder consisting of nine other polymers.
Marcus Garcia, PharmD, a postdoctoral fellow in Campen’s lab who
performed many of the experiments, said that until now, it has been
difficult to quantify how much microplastic was present in human tissue.
Typically, researchers would simply count the number of particles
visible under a microscope, even though some particles are too small to
be seen.
With the new analytical method, he said, “We can take it to that next
step to be able to adequately quantify it and say, ‘This is how many
micrograms or milligrams,’ depending on the plastics that we have.”
Plastic use worldwide has grown exponentially since the early 1950s,
producing a metric ton of plastic waste for every person on the planet.
About a third of the plastic that has been produced is still in use, but
most of the rest has been discarded or sent to landfills, where it
starts to break down from exposure to ultraviolet radiation present in
sunlight.
“That ends up in groundwater, and sometimes it aerosolizes and ends up
in our environment,” Garcia said. “We’re not only getting it from
ingestion but also through inhalation as well. It not only affects us as
humans, but all off our animals – chickens, livestock – and all of our
plants. We’re seeing it in everything.”
Campen points out that many plastics have a long half-life – the amount
of time needed for half of a sample to degrade. “So, the half-life of
some things is 300 years and the half-life of others is 50 years, but
between now and 300 years some of that plastic gets degraded,” he said.
“Those microplastics that we’re seeing in the environment are probably
40 or 50 years old.”
While microplastics are already present in our bodies, it is unclear
what health effects they might have, if any. Traditionally, plastics
have been assumed to be biologically inert, but some microplastics so
small they are measured in nanometers – a billionth of a meter – and are
capable of crossing cell membranes, he said.
Campen said the growing concentration of microplastics in human tissue
might explain puzzling increases in some types of health problems, such
as inflammatory bowel disease and colon cancer in people under 50, as
well as declining sperm counts.
The concentration of microplastics in placentas is particularly
troubling, he said, because the tissue has only been growing for eight
months (it starts to form about a month into a pregnancy). “Other organs
of your body are accumulating over much longer periods of time.”
Campen and his colleagues are planning further research to answer some
of these questions, but in the meantime he is deeply concerned by the
growing production of plastics worldwide.
“It’s only getting worse, and the trajectory is it will double every 10
to 15 years,” he said. “So, even if we were to stop it today, in 2050
there will be three times as much plastic in the background as there is
now. And we’re not going to stop it today.”