Plants naturally pick up heavy metals from the soil they grow in, generally these are rather small amounts and both humans and animals can process them. There is almost no danger in consuming plants unless the soil is dangerously contaminated (generally an industrial source, or occasionally a fluke a geography).
The problem comes with the concentrated protein supplements, as it also concentrates the contaminants. Protein supplements are generally sourced from the fruit of the plant, e.g. the bean from soy or the pea from pea. This is also where much of the soil nutrients bioaccumulate, as the plant is sending a bunch of water to the fruit in order to make it grow. When millions of soybeans are then ground up and concentrated into protein powder, the lead/cadmium/arsenic/Mercury remain behind in the powder - still in low amounts, but enough that if someone is using large amounts of the supplement daily they can be ingesting a lot more heavy metals than they are aware of.
With animal-sourced proteins, contamination is generally lower (although plenty of brands still have concerning levels) simply because the protein is sourced from places where heavy metals don’t preferentially accumulate. E.g. lead bioaccumulates in bones and teeth, cow-sources protein is generally whey (from milk) or more rarely from the muscles - both places naturally lower in lead Owing to the cow’s biochemistry.
For the record, I am a vegetarian (vegan + eggs) and use vegan protein supplements. I buy from brands which publish third party testing results on heavy metals contamination by lot to help control this exposure risk.
Most of the plant-based protein on the market is sourced from China and seems to be contaminated with high levels of lead - probably due to poor processing controls, and far in excess of natural plant or animal sources.
Unfortunately Chinese manufacturers have a long history of using harmful fillers in consumables, even for the non-export market so it’s hard to tell how much is accidental and how much intentional.
They got the death penalty more for being dumb enough to get caught. Chinese goods - from aircraft parts and concrete to food and clothing have repeatedly been found to have dangerously cut corners and/or inadequately ensured product safety.
Oh, it’s so much worse than that - NotCo (the sponsor of the study, not just the source of the protein) is using an LLM to create plant-based alternatives to animal-based foods, such as milk, burgers, and mayonnaise. And just because they’re based in Chile, I wouldn’t take that to mean that’s where the plant protein is coming from, as they’re just the “designers” of these foods, not the manufacturers.
Don’t animals accumulate the heavy metals they consume from plants?
Plants naturally pick up heavy metals from the soil they grow in, generally these are rather small amounts and both humans and animals can process them. There is almost no danger in consuming plants unless the soil is dangerously contaminated (generally an industrial source, or occasionally a fluke a geography).
The problem comes with the concentrated protein supplements, as it also concentrates the contaminants. Protein supplements are generally sourced from the fruit of the plant, e.g. the bean from soy or the pea from pea. This is also where much of the soil nutrients bioaccumulate, as the plant is sending a bunch of water to the fruit in order to make it grow. When millions of soybeans are then ground up and concentrated into protein powder, the lead/cadmium/arsenic/Mercury remain behind in the powder - still in low amounts, but enough that if someone is using large amounts of the supplement daily they can be ingesting a lot more heavy metals than they are aware of.
With animal-sourced proteins, contamination is generally lower (although plenty of brands still have concerning levels) simply because the protein is sourced from places where heavy metals don’t preferentially accumulate. E.g. lead bioaccumulates in bones and teeth, cow-sources protein is generally whey (from milk) or more rarely from the muscles - both places naturally lower in lead Owing to the cow’s biochemistry.
For the record, I am a vegetarian (vegan + eggs) and use vegan protein supplements. I buy from brands which publish third party testing results on heavy metals contamination by lot to help control this exposure risk.
Most of the plant-based protein on the market is sourced from China and seems to be contaminated with high levels of lead - probably due to poor processing controls, and far in excess of natural plant or animal sources.
If it follows the chocolate heavy metal contaminants across brands, it’s likely the machinery used to grind things.
Unfortunately Chinese manufacturers have a long history of using harmful fillers in consumables, even for the non-export market so it’s hard to tell how much is accidental and how much intentional.
I dunno if I would consider that to be the norm…those people got the death penalty for what they did, after all.
They got the death penalty more for being dumb enough to get caught. Chinese goods - from aircraft parts and concrete to food and clothing have repeatedly been found to have dangerously cut corners and/or inadequately ensured product safety.
The study says they sourced their proteins from “Not Company LTDA”, which seems to be Chilean.
Oh, it’s so much worse than that - NotCo (the sponsor of the study, not just the source of the protein) is using an LLM to create plant-based alternatives to animal-based foods, such as milk, burgers, and mayonnaise. And just because they’re based in Chile, I wouldn’t take that to mean that’s where the plant protein is coming from, as they’re just the “designers” of these foods, not the manufacturers.
According to the research I read, in this community, for some reason it’s the plant protein supplements that have more