If I was a worry wort I'd be more concerned in what there feeding the chickens that make them egg laying machines.
We should all be concerned about what goes into the animals and vegetables that wind up on our tables. The factory farming that produces beef, pork and poultry uses medicated and hormone fortified feed to raise the animals as quickly as possible and to produce the highest yield in the shortest time.
Chickens used to produce eggs are kept in small cages. The feed has drugs to sedate the birds so they don't go nuts, drugs to keep disease down, drugs to make the birds lay more eggs.
And that **** is passed right through to the eggs.
Chickens raised to produce meat are raised in sheds. The feed has drugs to sedate them so they don't peck each other to death, drugs to keep disease down, and drugs to make them grow bigger and faster.
And that **** is in the meat that you buy in the store.
Beef cattle are fed feed that has drugs to keep disease down, drugs to make them grow faster and bigger.
And that **** is in the meat that you buy in the store.
Dairy cattle are fed feed that has drugs to keep disease down, and drugs to make them produce more milk.
And that **** is in the milk that you buy in the store.
Hogs are fed feed that has drugs to keep disease down, drugs to make them grow faster and bigger.
And that **** is in the meat that you buy in the store.
Same for vegetables. Companies like Monsanto produce seed that grows crops which will not produce viable seeds, so the farmers are forced to buy from them. The seed stock is genetically engineered to not be affected by RoundUp weed killer, so the farmers can have crop dusters spray the fields for weeds without killing the crop.
If farmers are caught trying to grow seed crops then they are forced out of business by the major seed companies like Monsanto.
And everything that goes into the animals and crops to get the "perfect" factory results winds up in the meat and produce that you put on your table and into your body.
Better living through chemistry.
Right.