Nov 14 β€’ 9 tweets β€’ 3 min read Twitter logo Read on Twitter
People sometimes ask me, "Is there anything worse than plastic?" My answer would be, "Of course!" One thing that's definitely worse than plastic is... recycled plastic, as this new study shows. πŸ‘‡ Image
Experts believe there may be as many as 13,000 different chemicals involved in the manufacture of plastics, the vast majority of which are totally unknown to us in terms of their safety and potential toxicity.

But plastics can also be contaminated with other chemicals, including pesticides, pharmaceuticals & industrial chemicals, at various stages of their lifecycles. If these contaminated plastics are then recycled, humans can then be exposed to these harmful substances. Image
Researchers tested plastic pellets from recycling plants in 13 different plants across the world. They found 491 readily identifiable organic compounds, with a further 170 tentatively identified. As you can see from the table below, they span a wide variety of chemical classes. Image
As well as being harmful to the workers handling them, recycled plastics are also potentially harmful to consumers who use them. Recycled plastics have a wide variety of applications, from toys and furniture to clothing.
Recycled plastic clothing, like these t-shirts from the brand Oceanness, are advertised as the height of ethical consumerism, but in reality if you wear such clothing, you may be exposing your body, through your skin and through inhalation of fibres to some horrible chemicals... Image
that you wouldn't find in "virgin" plastic.

And look, here are 100% recycled plastic toys for your little ones to chew on all day long... Image
This new study makes it pretty clear, as far as I can see, that recycling plastic is a bad idea. We already know that recycling produces massive quantities of microplastic waste as well. What we really need to be doing is phasing out our use of plastics, full stop. And now.
Here's a link to the new study:


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More from @Babygravy9

Nov 8

A worrying new study suggests combined oral contraceptives shrink a region of the brain associated with regulating emotions and processing fear signals. 150+ million women worldwide use oral contraceptives. πŸ‘‡ Image
The research is published in the journal Frontiers of Endocrinology. Existing studies had already suggested that oral contraception might tamper with fear processing in women, but more rigorous research was needed. The new study aims to provide this. Image
The study was small-scale, with around 200 participants, male and female. MRI imaging was used examine the brain and map volume and cortical thickness of particular regions associated with fear processing and emotional control. Image
Read 7 tweets
Nov 4

Per- and polyfluoro-alkyl substances (PFAS), often referred to as "forever chemicals", are associated with a substantially increased risk of thyroid cancer (56%) according to a new study. πŸ‘‡ Image
For a primer on PFAS pollution, try this thread:

Or read this essay I wrote for @theamgreatness:

Read 10 tweets
Oct 29

As well as being delicious, tea contains a wide variety of plant phenols with wonderous effects, including offering a temporary free testosterone boost, as a study in the journal Steroids reveals. πŸ‘‡ Image
One of the ways testosterone is rendered ineffective is through a process called glucuronidation, in which sugar molecules bind to it. The enzyme UGT2B17 is responsible for doing this. Substances that inhibit this enzyme, like diclofenac and ibuprofen can neutralise its effect. Image
Researchers suspected that polyphenols such as epicatechin and EGCG might have the same effect. These compounds are known to inhibit a variety of enzymes. Maximum levels of these compounds in the body are reached about 2 hours after consuming tea. Image
Read 7 tweets
Oct 25

Here's another reason to ditch craft beer: more and more brewers are using GMO yeast -- not that they'll tell you. This is yet another instance of food manufacturers sneaking GMO in to the food supply. πŸ‘‡ Image
Wired first reported this back in July. More and more craft beer makers in the US are adopting CRISPR-modified yeasts made by a biotech company called Berkeley Yeast. But why? Image
Because the technology allows them to do things like increase the stability of the flavours in the beer and also add novel flavours like guava, passionfruit, pineapple or "a tropical melange". The modified yeasts can also cut brewing times and prevent certain compounds forming.
Read 14 tweets
Oct 24

In a new independent study of America's 20 top-selling fast-food brands, 100% tested positive for glyphosate, the main ingredient in Monsanto's Roundup herbicide, and 76% tested positive for other pesticides as well. πŸ‘‡ Image
Moms Across America, a nationwide non-profit, had food from the top 20 fast-food brands in America tested for a wide variety of harmful chemicals and substances. Fast food is eaten by 85 million Americans a day, and many of these chains are also suppliers of school lunches. Image
Glyphosate, on the chemicals tested for, has been linked to a wide array of conditions in humans and animals. Most recently, it's been linked to reduced cognitive development in adolescents after a large-scale study in Ecuador.

Read 11 tweets
Oct 22
This is a crazy new study. Scientists transferred bacteria from the guts of Alzheimer's patients to mice and gave them symptoms of the disease too. Could Alzheimer's be caused by serious gut dysbiosis? πŸ‘‡ Image
Alzheimer's patients are known to have a higher abundance of inflammation-promoting species of bacteria in their gut. Image
Fecal transplants from Alzheimer's patients were given to mice and the mice were then subject to memory testing. The mice that had received the fecal transplants suffered cognitive impairments associated with function of the hippocampus.
Read 7 tweets

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