Don’t buy cheap eggs. The plastic is introduced via the feed, through vectors like expired bread products. There’s nothing wrong with using expired baked goods. The issue comes when they don’t take off the plastic wrapping and just let everything be shredded into the feed.
I do not believe grass fed chickens have the same problem.
I strongly doubt they shred the plastic packaging into the feed. That said, plastic is already in everything. It's in our blood, in the placenta of fetuses. I think you'd be hard-pressed to find a chicken that doesn't have microplastics in its blood.
It's apparently not economical to separate the plastic packaging from expired product. I've seen the same happen to old packets of biscuits being shredded.
I always think environmental charities should prepare an advert against the practice with a family eating breakfast, then one person picking some plastic packaging from their teeth.
I may have not used the right video, I can remember watching a documentary in the UK where things weren't separated properly, and they showed pieces of blue wrapping still in the feed.
Some animals have more microplastics than others due to their environment and other living conditions. Factory farm animals literally have plastic in their feed.
But seriously, this does raise genuine concerns about what is the acceptable limit for microplastics in the egg whites initially, since microplastics have made way to everything we consume today.
